snippetjavascriptCritical
How to create an array containing 1...N
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arrayhowcontainingcreate
Problem
I'm looking for any alternatives to the below for creating a JavaScript array containing 1 through to N where N is only known at runtime.
To me it feels like there should be a way of doing this without the loop.
var foo = [];
for (var i = 1; i <= N; i++) {
foo.push(i);
}To me it feels like there should be a way of doing this without the loop.
Solution
If I get what you are after, you want an array of numbers
If this is all you need, can you do this instead?
then when you want to use it... (un-optimized, just for example)
e.g. if you don't need to store anything in the array, you just need a container of the right length that you can iterate over... this might be easier.
See it in action here: http://jsfiddle.net/3kcvm/
1..n that you can later loop through.If this is all you need, can you do this instead?
var foo = new Array(45); // create an empty array with length 45then when you want to use it... (un-optimized, just for example)
for(var i = 0; i ');
}e.g. if you don't need to store anything in the array, you just need a container of the right length that you can iterate over... this might be easier.
See it in action here: http://jsfiddle.net/3kcvm/
Code Snippets
var foo = new Array(45); // create an empty array with length 45for(var i = 0; i < foo.length; i++){
document.write('Item: ' + (i + 1) + ' of ' + foo.length + '<br/>');
}Context
Stack Overflow Q#3746725, score: 561
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