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I have the following arrays:
var dates = new Array();
var answers = new Array();
Once Populated, they will be the same length. What I need is an array that pair the same index values of the arrays. Like so:
var pairedArray = new Array();
//pairedArray should have the form: [[dates[0], answers[0]], [dates[1], answers[1]], ...., [dates[n-1], answers[n-1]]]
e.g.
data: [
[Date.UTC(2010, 0, 1), 29.9],
[Date.UTC(2010, 2, 1), 71.5],
[Date.UTC(2010, 3, 1), 106.4]
]
How is this possible given that I have two arrays of the same length, answers and dates that are already populated?
963
An array is an ordered collection of values: each value is called an element, and each element has a numeric position in the array, known as its index. JavaScript lets us create arrays inside array called Nested Arrays.
To merge elements from one array to another, we must first iterate(loop) through all the array elements. In the loop, we will retrieve each element from an array and insert(using the array push() method) to another array. Now, we can call the merge() function and pass two arrays as the arguments for merging.
In Chrome devtools, var array = [1,2,3]; array = array. concat(array); returns [1, 2, 3, 1, 2, 3] .
A multidimensional array is an array that contains another array. For example, // multidimensional array const data = [[1, 2, 3], [1, 3, 4], [4, 5, 6]];
If you know they are always the same length, simply loop through one and add both to the result:
var data = [];
for(var i=0; i<dates.length; i++){
data.push([dates[i], answers[i]]);
}
var data = $.map(dates, function(v,i) { return [ [ v,answers[i] ] ]; });
You can use the jQuery.map()[docs] method, but you need to double-wrap the returned Array because when $.map gets an Array, it performs a concat.
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