How to generate sequence of numbers/chars in javascript?
Is there a way to generate sequence of characters or numbers in javascript?
For example, I want to create array that contains eight 1s. I can do it with for loop, but wondering whether there is a jQuery library or javascript function that can do it for me?
You can make your own re-usable function I suppose, for your example:
function makeArray(count, content) {
var result = [];
if(typeof content == "function") {
for(var i = 0; i < count; i++) {
result.push(content(i));
}
} else {
for(var i = 0; i < count; i++) {
result.push(content);
}
}
return result;
}
Then you could do either of these:
var myArray = makeArray(8, 1);
//or something more complex, for example:
var myArray = makeArray(8, function(i) { return i * 3; });
You can give it a try here, note the above example doesn't rely on jQuery at all so you can use it without. You just don't gain anything from the library for something like this :)
Without a for loop, here is a solution:
Array.apply(0, Array(8)).map(function() { return 1; })
The explanation follows.
Array(8) produces a sparse array with 8 elements, all undefined . The apply trick will turn it into a dense array. Finally, with map , we replace that undefined the (same) value of 1 .
for (var i=8, a=[]; i--;) a.push(1);
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