Jquery: Put split arrays into an array without matching them

Question

I have an input that could be as follows:

"a"

or

  ["a","b"]

or

  [["a","b"],["c"]] 

the goal is to convert them to a third template. I mean, I need a large array containing several arrays. as pseudo code, I try as below:

  input=[].concat(input);
  for (var t in input)
   {
     t=[].concat(input);
   }

but it does not work for the second template, as I want [["a","b"]].

"a"=>[["a"]]

and

  ["a","b"]=>[["a","b"]]

and

  [["a","b"],["c"]] => [["a","b"],["c"]] 

Answer 1

You can check if a given value is an array, and if the inner element is also an array, and if not, wrap the value in an array.

function convert(v) {
    if (!Array.isArray(v)) {
        v = [v];
    }
    if (!Array.isArray(v[0])) {
        v = [v];
    }
    return v;
}

console.log(convert("a"));                 // [["a"]]
console.log(convert(["a", "b"]));          // [["a", "b"]]
console.log(convert([["a", "b"], ["c"]])); // [["a", "b"], ["c"]]

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If you need to check every element of the internal array, you can check all elements first.

function convert(v) {
    if (!Array.isArray(v)) {
        v = [v];
    }
    if (v.some(function (a) { return !Array.isArray(a); })) {
        v = [v];
    }
    return v;
}

console.log(convert("a"));               // [["a"]]
console.log(convert(["a", "b"]));        // [["a", "b"]]
console.log(convert([["a", "b"], "c"])); // [[["a", "b"], "c"]]

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Answer 2

:

var inputs = ["a", ["a","b"],[["a","b"],["c"]]],
    result = inputs.map(a => [[].concat(...a)]);
console.log(JSON.stringify(result));

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