function permute(input) {
var permArr = [],
usedChars = [];
function main(input){
var i, ch;
for (i = 0; i < input.length; i++) {
ch = input.splice(i, 1)[0];
usedChars.push(ch);
if (input.length == 0) {
permArr.push(usedChars.slice());
}
main(input);
input.splice(i, 0, ch);
usedChars.pop();
}
return permArr
}
return main(input);
};
console.log(permute([5, 3, 7, 1]));
转载自https://www.jb51.net/article/62524.htm
另外一种是根据字符串 来排序
function permutate(str) {
var result=[];
if(str.length==1){
return [str]
}else{
var preResult=permutate(str.slice(1));
for (var j = 0; j < preResult.length; j++) {
for (var k = 0; k < preResult[j].length+1; k++) {
var temp=preResult[j].slice(0,k)+str[0]+preResult[j].slice(k);
result.push(temp);
}
}
return result;
}
}
console.log(permutate("abc"));