How can I produce all of the combinations of the values in N number of JavaScript arrays of variable lengths?(如何在N个可变长度的JavaScript数组中生成值的所有组合？)
Let's say I have N number of JavaScript arrays, eg(假设我有N个JavaScript数组，例如)
var first = ['a', 'b', 'c', 'd'];
var second = ['e'];
var third = ['f', 'g', 'h', 'i', 'j'];
(Three arrays in this example, but its N number of arrays for the problem.)(（此示例中为三个数组，但是有N个数组用于解决此问题。）)
And I want to output all the combinations of their values, to produce(我想输出其值的所有组合，以产生)
aef
aeg
aeh
aei
aej
bef
beg
....
dej
EDIT: Here's the version I got working, using ffriend's accepted answer as the basis.(编辑：这是我使用ffriend接受的答案作为基础的版本。)
var allArrays = [['a', 'b'], ['c', 'z'], ['d', 'e', 'f']];
function allPossibleCases(arr) {
if (arr.length === 0) {
return [];
}
else if (arr.length ===1){
return arr[0];
}
else {
var result = [];
var allCasesOfRest = allPossibleCases(arr.slice(1)); // recur with the rest of array
for (var c in allCasesOfRest) {
for (var i = 0; i < arr[0].length; i++) {
result.push(arr[0][i] + allCasesOfRest[c]);
}
}
return result;
}
}
var r=allPossibleCases(allArrays);
//outputs ["acd", "bcd", "azd", "bzd", "ace", "bce", "aze", "bze", "acf", "bcf", "azf", "bzf"]
ask by Yahel translate from so
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