js array fill map
let filledArray = new Array(10)
.fill(null)
.map(()=> ({'hello':'goodbye'}))
// In this approach, we are creating an array with ten empty slots,
// then filling those slots with the null value,
// then creating a new array with unique objects.
// Now when we change an object in the array,
// we are only changing a specific object, not a reference to an object.javascript array
//create an array like so:
var colors = ["red","blue","green"];
//you can loop through an array like this:
for (var i = 0; i < colors.length; i++) {
console.log(colors[i]);
}javascript array read object value in array
var events = [
{
userId: 1,
place: "Wormholes Allow Information to Escape Black Holes",
name: "Check out this recent discovery about workholes",
date: "2020-06-26T17:58:57.776Z",
id: 1
},
{
userId: 1,
place: "Wormholes Allow Information to Escape Black Holes",
name: "Check out this recent discovery about workholes",
date: "2020-06-26T17:58:57.776Z",
id: 2
},
{
userId: 1,
place: "Wormholes Allow Information to Escape Black Holes",
name: "Check out this recent discovery about workholes",
date: "2020-06-26T17:58:57.776Z",
id: 3
}
];
console.log(events[0].place);return array javascript
function func() {
return [5, "string", {a: 7}];
}Copyright © 2021 Codeinu
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