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[英]Obtain all possible combinations of the elements of an array with each other, in pairs and without repeating
[英]All possible combinations of an array without repeating?
说我有和数组:
var arr = [1,2,3,4];
我将如何重复获取所有可能的组合?
例如:
// "2,1" wouldn't be valid because it's essentially "1,2"
1
1,2
1,2,3
1,2,3,4
2
2,3
2,3,4
3
3,4
4
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