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id | title | challengeType | videoUrl | forumTopicId | dashedName |
---|---|---|---|---|---|
56533eb9ac21ba0edf2244c7 | Accessing Object Properties with Dot Notation | 1 | https://scrimba.com/c/cGryJs8 | 16164 | accessing-object-properties-with-dot-notation |
--description--
There are two ways to access the properties of an object: dot notation (.
) and bracket notation ([]
), similar to an array.
Dot notation is what you use when you know the name of the property you're trying to access ahead of time.
Here is a sample of using dot notation (.
) to read an object's property:
var myObj = {
prop1: "val1",
prop2: "val2"
};
var prop1val = myObj.prop1;
var prop2val = myObj.prop2;
prop1val
would have a value of the string val1
, and prop2val
would have a value of the string val2
.
--instructions--
Read in the property values of testObj
using dot notation. Set the variable hatValue
equal to the object's property hat
and set the variable shirtValue
equal to the object's property shirt
.
--hints--
hatValue
should be a string
assert(typeof hatValue === 'string');
The value of hatValue
should be the string ballcap
assert(hatValue === 'ballcap');
shirtValue
should be a string
assert(typeof shirtValue === 'string');
The value of shirtValue
should be the string jersey
assert(shirtValue === 'jersey');
You should use dot notation twice
assert(code.match(/testObj\.\w+/g).length > 1);
--seed--
--after-user-code--
(function(a,b) { return "hatValue = '" + a + "', shirtValue = '" + b + "'"; })(hatValue,shirtValue);
--seed-contents--
// Setup
var testObj = {
"hat": "ballcap",
"shirt": "jersey",
"shoes": "cleats"
};
// Only change code below this line
var hatValue = testObj; // Change this line
var shirtValue = testObj; // Change this line
--solutions--
var testObj = {
"hat": "ballcap",
"shirt": "jersey",
"shoes": "cleats"
};
var hatValue = testObj.hat;
var shirtValue = testObj.shirt;