3.4 KiB
3.4 KiB
title | id | challengeType |
---|---|---|
GeneratorExponential | 5a23c84252665b21eecc7e7b | 5 |
Description
Instructions
Tests
tests:
- text: <code>exponentialGenerator</code> should be a function.
testString: assert(typeof exponentialGenerator=='function','<code>exponentialGenerator</code> should be a function.');
- text: <code>exponentialGenerator()</code> should return a number.
testString: assert(typeof exponentialGenerator(10)=='number','<code>exponentialGenerator()</code> should return a number.');
- text: <code>exponentialGenerator(10)</code> should return <code>144</code>.
testString: assert.equal(exponentialGenerator(10),144,'<code>exponentialGenerator(10)</code> should return <code>144</code>.');
- text: <code>exponentialGenerator(12)</code> should return <code>196</code>.
testString: assert.equal(exponentialGenerator(12),196,'<code>exponentialGenerator(12)</code> should return <code>196</code>.');
- text: <code>exponentialGenerator(14)</code> should return <code>256</code>.
testString: assert.equal(exponentialGenerator(14),256,'<code>exponentialGenerator(14)</code> should return <code>256</code>.');
- text: <code>exponentialGenerator(20)</code> should return <code>484</code>.
testString: assert.equal(exponentialGenerator(20),484,'<code>exponentialGenerator(20)</code> should return <code>484</code>.');
- text: <code>exponentialGenerator(25)</code> should return <code>784</code>.
testString: assert.equal(exponentialGenerator(25),784,'<code>exponentialGenerator(25)</code> should return <code>784</code>.');
Challenge Seed
function exponentialGenerator (n) {
// Good luck!
}
Solution
function exponentialGenerator(n){
function* PowersGenerator(m) {
var n=0;
while(1) {
yield Math.pow(n, m);
n += 1;
}
}
function* FilteredGenerator(g, f){
var value = g.next().value;
var filter = f.next().value;
while(1) {
if( value < filter ) {
yield value;
value = g.next().value;
} else if ( value > filter ) {
filter = f.next().value;
} else {
value = g.next().value;
filter = f.next().value;
}
}
}
var squares = PowersGenerator(2);
var cubes = PowersGenerator(3);
var filtered = FilteredGenerator(squares, cubes);
var curr=0;
for(var i=0;i<n;i++) curr=filtered.next();
return curr.value;
}