1 answers

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Asked by:

963

I have an array that contains arrays and I would like to sort the arrays in order based on a certain string within those arrays.

For example:

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var array = [
    [3, 'Kate', '...'],
    [1, 'Tom', '...'],
    [2, 'Ann', '...'],
    [4, 'Mark', '...'],
];

I want it to be sorted alphabetically by name in the following order:

xxxxxxxxxx
 
[
  [ 2, 'Ann', '...' ],
  [ 3, 'Kate', '...' ],
  [ 4, 'Mark', '...' ],
  [ 1, 'Tom', '...' ]
]

1 answer

0 points

Answered by:

Admin Dirask Community

4380

You can pass a custom compare function to the sort() method.

Practical examples

ES6+ solution:

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let array = [
    [3, 'Kate', '...'],
    [1, 'Tom', '...'],
    [2, 'Ann', '...'],
    [4, 'Mark', '...'],
];
​
array = array.sort((a, b) => (a[1] < b[1] ? -1 : 1));
​
console.log(JSON.stringify(array, null, 4));

Auto running

For older versions:

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function compareFunction(a, b) {
    if (a[1] < b[1]) return -1;
    if (a[1] > b[1]) return 1;
    return 0;
}
​
var array = [
    [3, 'Kate', '...'],
    [1, 'Tom', '...'],
    [2, 'Ann', '...'],
    [4, 'Mark', '...'],
];
​
array = array.sort(compareFunction);
​
console.log(JSON.stringify(array, null, 4));