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* fix(curriculum): tests quotes * fix(curriculum): fill seed-teardown * fix(curriculum): fix tests and remove unneeded seed-teardown
2.5 KiB
2.5 KiB
id, title, challengeType
id | title | challengeType |
---|---|---|
587d7b7d367417b2b2512b1e | Generate an Array of All Object Keys with Object.keys() | 1 |
Description
Object.keys()
method and passing in an object as the argument. This will return an array with strings representing each property in the object. Again, there will be no specific order to the entries in the array.
Instructions
getArrayOfUsers
function so that it returns an array containing all the properties in the object it receives as an argument.
Tests
tests:
- text: The <code>users</code> object only contains the keys <code>Alan</code>, <code>Jeff</code>, <code>Sarah</code>, and <code>Ryan</code>
testString: assert('Alan' in users && 'Jeff' in users && 'Sarah' in users && 'Ryan' in users && Object.keys(users).length === 4, 'The <code>users</code> object only contains the keys <code>Alan</code>, <code>Jeff</code>, <code>Sarah</code>, and <code>Ryan</code>');
- text: The <code>getArrayOfUsers</code> function returns an array which contains all the keys in the <code>users</code> object
testString: assert((function() { users.Sam = {}; users.Lewis = {}; let R = getArrayOfUsers(users); return (R.indexOf('Alan') !== -1 && R.indexOf('Jeff') !== -1 && R.indexOf('Sarah') !== -1 && R.indexOf('Ryan') !== -1 && R.indexOf('Sam') !== -1 && R.indexOf('Lewis') !== -1); })() === true, 'The <code>getArrayOfUsers</code> function returns an array which contains all the keys in the <code>users</code> object');
Challenge Seed
let users = {
Alan: {
age: 27,
online: false
},
Jeff: {
age: 32,
online: true
},
Sarah: {
age: 48,
online: false
},
Ryan: {
age: 19,
online: true
}
};
function getArrayOfUsers(obj) {
// change code below this line
// change code above this line
}
console.log(getArrayOfUsers(users));
Solution
let users = {
Alan: {
age: 27,
online: false
},
Jeff: {
age: 32,
online: true
},
Sarah: {
age: 48,
online: false
},
Ryan: {
age: 19,
online: true
}
};
function getArrayOfUsers(obj) {
return Object.keys(users);
}
console.log(getArrayOfUsers(users));