Nick Karnik
parent
4aa4248204
commit
95d8473fef
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@ -40,7 +40,7 @@
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"<hr>",
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"Replace <code>var</code> with <code>let</code>"
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],
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"challengeSeed": [
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"challengeSeed": [
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"var catName;",
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"var quote;",
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"function catTalk() {",
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@ -81,10 +81,10 @@
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"Fix the code so that <code>i</code> declared in the if statement is a separate variable than <code>i</code> declared in the first line of the function. Be certain not to use the <code>var</code> keyword anywhere in your code.",
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"This exercise is designed to illustrate the difference between how <code>var</code> and <code>let</code> keywords assign scope to the declared variable. When programming a function similar to the one used in this exercise, it is often better to use different variable names to avoid confusion."
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],
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"challengeSeed": [
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"challengeSeed": [
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"",
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"function checkScope() {",
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"\"use strict\";",
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"\"use strict\";",
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" var i = \"function scope\";",
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" if (true) {",
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" i = \"block scope\";",
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@ -115,9 +115,9 @@
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"<hr>",
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"Change the code so that all variables are declared using <code>let</code> or <code>const</code>. Use <code>let</code> when you want the variable to change, and <code>const</code> when you want the variable to remain constant. Also, rename variables declared with <code>const</code> to conform to common practices, meaning constants should be in all caps"
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],
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"challengeSeed": [
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"challengeSeed": [
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"function printManyTimes(str) {",
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" \"use strict\";",
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" \"use strict\";",
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"",
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" // change code below this line",
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"",
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@ -153,10 +153,10 @@
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"<hr>",
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"An array is declared as <code>const s = [5, 7, 2]</code>. Change the array to <code>[2, 5, 7]</code> using various element assignment."
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],
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"challengeSeed": [
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"challengeSeed": [
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"const s = [5, 7, 2];",
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"function editInPlace() {",
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" \"use strict\";",
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" \"use strict\";",
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" // change code below this line",
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"",
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" // s = [2, 5, 7]; <- this is invalid",
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@ -186,7 +186,7 @@
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"<hr>",
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"In this challenge you are going to use <code>Object.freeze</code> to prevent mathematical constants from changing. You need to freeze <code>MATH_CONSTANTS</code> object so that noone is able alter the value of <code>PI</code> or add any more properties to it."
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],
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"challengeSeed": [
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"challengeSeed": [
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"function freezeObj() {",
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" \"use strict\";",
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" const MATH_CONSTANTS = {",
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@ -196,7 +196,7 @@
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"",
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"",
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" // change code above this line",
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" try {",
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" try {",
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" MATH_CONSTANTS.PI = 99;",
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" } catch( ex ) {",
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" console.log(ex);",
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@ -231,7 +231,7 @@
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"<hr>",
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"Rewrite the function assigned to the variable <code>magic</code> which returns a new <code>Date()</code> to use arrow function syntax. Also make sure nothing is defined using the keyword <code>var</code>."
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],
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"challengeSeed": [
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"challengeSeed": [
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"var magic = function() {",
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" \"use strict\";",
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" return new Date();",
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@ -259,7 +259,7 @@
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"<hr>",
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"Rewrite the <code>myConcat</code> function which appends contents of <code>arr2</code> to <code>arr1</code> so that the function uses arrow function syntax."
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],
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"challengeSeed": [
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"challengeSeed": [
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"var myConcat = function(arr1, arr2) {",
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" \"use strict\";",
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" return arr1.concat(arr2);",
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@ -272,7 +272,7 @@
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"getUserInput => assert(getUserInput('index').match(/const\\s+myConcat/g), 'message: <code>myConcat</code> should be a constant variable (by using <code>const</code>).');",
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"assert(typeof myConcat === 'function', 'message: <code>myConcat</code> should be a function');",
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"assert(() => { const a = myConcat([1], [2]); return a[0] == 1 && a[1] == 2; }, 'message: <code>myConcat()</code> returns the correct <code>array</code>');",
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"getUserInput => assert(!getUserInput('index').match(/function/g), 'message: <code>function</code> keyword was not used.');"
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"getUserInput => assert(!getUserInput('index').match(/function/g), 'message: <code>function</code> keyword was not used.');"
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],
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"type": "waypoint",
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"releasedOn": "Feb 17, 2017",
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@ -293,7 +293,7 @@
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"<hr>",
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"Use arrow function syntax to compute the square of only the positive integers (fractions are not integers) in the array <code>realNumberArray</code> and store the new array in the variable <code>squaredIntegers</code>."
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],
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"challengeSeed": [
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"challengeSeed": [
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"const realNumberArray = [4, 5.6, -9.8, 3.14, 42, 6, 8.34];",
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"const squareList = (arr) => {",
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" \"use strict\";",
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@ -311,7 +311,7 @@
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"getUserInput => assert(getUserInput('index').match(/const\\s+squaredIntegers/g), 'message: <code>squaredIntegers</code> should be a constant variable (by using <code>const</code>).');",
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"assert(Array.isArray(squaredIntegers), 'message: <code>squaredIntegers</code> should be an <code>array</code>');",
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"assert(squaredIntegers[0] === 16 && squaredIntegers[1] === 1764 && squaredIntegers[2] === 36, 'message: <code>squaredIntegers</code> should be <code>[16, 1764, 36]</code>');",
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"getUserInput => assert(!getUserInput('index').match(/function/g), 'message: <code>function</code> keyword was not used.');",
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"getUserInput => assert(!getUserInput('index').match(/function/g), 'message: <code>function</code> keyword was not used.');",
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"getUserInput => assert(!getUserInput('index').match(/(for)|(while)/g), 'message: loop should not be used');",
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"getUserInput => assert(getUserInput('index').match(/map|filter|reduce/g), 'message: <code>map</code>, <code>filter</code>, or <code>reduce</code> should be used');"
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],
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@ -331,7 +331,7 @@
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"<hr>",
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"Modify the function <code>increment</code> by adding default parameters so that it will add 1 to <code>number</code> if <code>value</code> is not specified."
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],
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"challengeSeed": [
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"challengeSeed": [
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"const increment = (function() {",
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" \"use strict\";",
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" return function increment(number, value) {",
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@ -362,9 +362,9 @@
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"<hr>",
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"Modify the function <code>sum</code> so that is uses the rest operator and it works in the same way with any number of parameters."
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],
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"challengeSeed": [
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"challengeSeed": [
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"const sum = (function() {",
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" \"use strict\";",
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" \"use strict\";",
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" return function sum(x, y, z) {",
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" const array = [ x, y, z ];",
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" return array.reduce((a, b) => a + b, 0);",
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@ -400,9 +400,9 @@
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"<hr>",
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"Copy all contents of <code>arr1</code> into another array <code>arr2</code> using the spread operator."
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],
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"challengeSeed": [
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"const arr1 = ['JAN', 'FEB', 'MAR', 'APR', 'MAY'];",
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"let arr2;",
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"challengeSeed": [
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"const arr1 = ['JAN', 'FEB', 'MAR', 'APR', 'MAY'];",
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"let arr2;",
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"(function() {",
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" \"use strict\";",
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" arr2 = []; // change this line",
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@ -435,7 +435,7 @@
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"<hr>",
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"Use destructuring to obtain the length of the input string <code>str</code>, and assign the length to <code>len</code> in line."
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],
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"challengeSeed": [
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"challengeSeed": [
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"function getLength(str) {",
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" \"use strict\";",
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"",
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@ -470,7 +470,7 @@
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"<hr>",
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"Use destructuring assignment to obtain <code>max</code> of <code>forecast.tomorrow</code> and assign it to <code>maxOfTomorrow</code>."
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],
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"challengeSeed": [
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"challengeSeed": [
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"const LOCAL_FORECAST = {",
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" today: { min: 72, max: 83 },",
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" tomorrow: { min: 73.3, max: 84.6 }",
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@ -509,10 +509,10 @@
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"<hr>",
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"Use destructuring assignment to swap the values of <code>a</code> and <code>b</code> so that <code>a</code> receives the value stored in <code>b</code>, and <code>b</code> receives the value stored in <code>a</code>."
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],
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"challengeSeed": [
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"challengeSeed": [
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"let a = 8, b = 6;",
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"(() => {",
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" \"use strict\";",
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" \"use strict\";",
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" // change code below this line",
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" ",
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" // change code above this line",
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@ -542,7 +542,7 @@
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"<hr>",
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"Use destructuring assignment with the rest operator to perform an effective <code>Array.prototype.slice()</code> so that <code>arr</code> is a sub-array of the original array <code>source</code> with the first two elements ommitted."
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],
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"challengeSeed": [
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"challengeSeed": [
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"const source = [1,2,3,4,5,6,7,8,9,10];",
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"function removeFirstTwo(list) {",
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" \"use strict\";",
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@ -579,7 +579,7 @@
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"<hr>",
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"Use destructuring assignment within the argument to the function <code>half</code> to send only <code>max</code> and <code>min</code> inside the function."
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],
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"challengeSeed": [
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"challengeSeed": [
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"const stats = {",
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" max: 56.78,",
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" standard_deviation: 4.34,",
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@ -589,9 +589,9 @@
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" average: 35.85",
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"};",
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"const half = (function() {",
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" \"use strict\"; // do not change this line",
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" \"use strict\"; // do not change this line",
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"",
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" // change code below this line",
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" // change code below this line",
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" return function half(stats) {",
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" // use function argument destructuring",
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" return (stats.max + stats.min) / 2.0;",
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@ -626,7 +626,7 @@
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"<hr>",
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"Use template literal syntax with backticks to display each entry of the <code>result</code> object's <code>failure</code> array. Each entry should be wrapped inside an <code>li</code> element with the class attribute <code>text-warning</code>, and listed within the <code>resultDisplayArray</code>."
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],
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"challengeSeed": [
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"challengeSeed": [
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"const result = {",
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" success: [\"max-length\", \"no-amd\", \"prefer-arrow-functions\"],",
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" failure: [\"no-var\", \"var-on-top\", \"linebreak\"],",
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@ -673,7 +673,7 @@
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"<hr>",
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"Use simple fields with object literals to create and return a <code>Person</code> object."
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],
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"challengeSeed": [
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"challengeSeed": [
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"const createPerson = (name, age, gender) => {",
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" \"use strict\";",
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" // change code below this line",
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@ -706,8 +706,8 @@
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"<hr>",
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"Refactor the function <code>setGear</code> inside the object <code>bicycle</code> to use the shorthand syntax described above."
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],
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"challengeSeed": [
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"challengeSeed": [
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"// change code below this line",
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"const bicycle = {",
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" gear: 2,",
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@ -744,7 +744,7 @@
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"Use <code>class</code> keyword and write a proper constructor to create the <code>Vegetable</code> class.",
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"The <code>Vegetable</code> lets you create a vegetable object, with a property <code>name</code>, to be passed to constructor."
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],
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"challengeSeed": [
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"challengeSeed": [
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"function makeClass() {",
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" \"use strict\";",
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" /* Alter code below this line */",
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@ -786,7 +786,7 @@
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"This is the power of getter or setter - you are creating an API for another user, who would get the correct result, no matter which one you track.",
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"In other words, you are abstracting implementation details from the consumer."
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],
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"challengeSeed": [
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"challengeSeed": [
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"function makeClass() {",
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" \"use strict\";",
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" /* Alter code below this line */",
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@ -827,7 +827,14 @@
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"<hr>",
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"Add the appropriate <code>import</code> statement that will allow the current file to use the <code>capitalizeString</code> function. The file where this function lives is called <code>\"string_functions\"</code>, and it is in the same directory as the current file."
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],
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"challengeSeed": [
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"head": [
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"window.require = function (str) {",
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"if (str === 'string_functions') {",
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"return {",
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"capitalizeString: str => str.toUpperCase()",
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"}}};"
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],
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"challengeSeed": [
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"\"use strict\";",
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"capitalizeString(\"hello!\");"
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],
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"<hr>",
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"Below are two variables that I want to make available for other files to use. Utilizing the first way I demonstrated <code>export</code>, export the two variables."
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],
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"challengeSeed": [
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"head": [
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"window.exports = function(){};"
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],
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"challengeSeed": [
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"\"use strict\";",
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"const foo = \"bar\";",
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"const boo = \"far\";"
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@ -879,7 +889,15 @@
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"<hr>",
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"The code below requires the contents of a file, <code>\"capitalize_strings\"</code>, found in the same directory as it, imported. Add the appropriate <code>import *</code> statement to the top of the file, using the object provided."
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],
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"challengeSeed": [
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"head": [
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"window.require = function(str) {",
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"if (str === 'capitalize_strings') {",
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"return {",
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"capitalize: str => str.toUpperCase(),",
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"lowercase: str => str.toLowerCase()",
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"}}};"
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],
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"challengeSeed": [
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"\"use strict\";",
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"myStringModule.capitalize(\"foo\");",
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"myStringModule.lowercase(\"Foo\");"
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@ -904,7 +922,10 @@
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"<hr>",
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"The following function should be the fallback value for the module. Please add the necessary code to do so."
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],
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"challengeSeed": [
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"head": [
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"window.exports = function(){};"
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],
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"challengeSeed": [
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"\"use strict\";",
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"function subtract(x,y) {return x - y;}"
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],
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@ -927,7 +948,14 @@
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"<hr>",
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"In the following code, please import the default export, <code>subtract</code>, from the file <code>\"math_functions\"</code>, found in the same directory as this file."
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],
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"challengeSeed": [
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"head": [
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"window.require = function(str) {",
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"if (str === 'math_functions') {",
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"return function(a, b) {",
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"return a - b;",
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"}}};"
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],
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"challengeSeed": [
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"\"use strict\";",
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"subtract(7,4);"
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],
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Loading…
Reference in New Issue