Array in php with javascript

Question

I have code like this:

$data = array();
for(int $i = 0; $i < 10; $i ++)
 $data[$i][] = 5;

I don't know what's name of $data[$i][] = 5; in php and how to write this code in javascript?

or other hands, how can I write code above in javascript?

Thanks

P/s: I want to write that code on nodeJs

Answer 1

You can try Array#push to add a element for array

var data = [];
for(var i = 0; i < 10; i ++)
 if(!data[i]) data[i] = [];
 data[i].push(5);

• haidn: This seems error: data[i][].push(5); ^ SyntaxError: Unexpected token ]
• haidn: seems, working, Thanks but what's name of this code $data[$i][] = 5 in php? or how is working with that code?
• dieuhd: $data[$i][] = 5 equivalent $data[$i][count($data[$i])] = 5 to add a new element to array
• haidn: Cannot read property 'push' of undefined. seem not working... I'm coding in node js
• Dương Minh Khoa: as i comment, you need set data[i] = [] var data = []; for (var i = 0; i < 10; i ++){ data[i] = []; data[i].push(5); }

Answer 2

in this case, can understand $data[$i][] = 5; as below

$data[$i] = array();
array_push($data[$i],5);
// ex: [ 0 => [0 => 5]]

in Javascipt:

var data = [];
for (var i = 0; i < 10; i ++){
 data[i] = [];
 data[i].push(5);
}

• haidn: awesome!!. What I need. Thanks you!

Answer 3

Array.push() is a function used to insert a value into an array. But you can also use the C like way data[i] = 'value'.

data = [];
for (var i = 0; i < 10; i++)
 data.push([5]);
document.write(JSON.stringify(data))

As an alternative use

data = [];
for(var i = 0; i < 10; i ++)
 data[i] = [5];
document.write(JSON.stringify(data));

Answer 4

Use array.push() to add an item to the end of the array.

var sample = new Array();
sample.push(new Object());

To do this n times use a for loop.

var n = 100;
var sample = new Array();
for (var i = 0; i < n; i++)
 sample.push(new Object());

Note that you can also substitute new Array() with [] and new Object() with {} so it becomes:

var n = 100;
var sample = [];
for (var i = 0; i < n; i++)
 sample.push({});

Answer 5

JavaScript code:

var data = [];
for (i = 0; i < 10; i++) {
 data[i] = [];
 data[i][data[i].length] = 5;
}