Let's say I have an array of numbers presented in this format:
[5, 29, 1, 5, 4919, 109, 17]
My goal is to transform this array into pairs of numbers based on their index within the array. The desired output would look like this:
[[0, 5], [1, 29], [2, 5], [3, 4919], [4, 109], [5, 17]]
Any suggestions or examples on how to achieve this using javascript?
[2, 55, 6, 23, 8519, 130, 29].map(function(y,z){return [z,y];})
The previous response proposes the use of map, which is a viable solution and one that I would likely implement in my own code. However, it's worth noting that map was only introduced in ECMAScript 5, so it may not be compatible with older browsers without a polyfill.
If you're looking for a more universally compatible approach, a straightforward method could look something like this:
var input = [5, 29, 1, 5, 4919, 109, 17];
var output = [];
for (var i = 0; i < input.length; i++)
output.push([i, input[i]]);
Alternatively, you could consider this alternative method:
var input = [5, 29, 1, 5, 4919, 109, 17];
var output = Array(input.length);
for (var i in input)
output[i] = [i, input[i]];
Looking to fill the gaps in older browsers? Check out this handy library: - approximately 5.501 kilobytes in size.
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