一道JS排序题

Question

let arr = ['A1','A2','A100','A7','B2','A10','A14','B12','C1','C10','C5']

按照字母和数字的顺序进行排序

Answer 1

写个比较函数就可以了吧

提供思路，拒绝伸手党

Answer 2

// ie6+
var arr = ['A1','A2','A100','A7','B2','A10','A14','B12','C1','C10','C5']
arr.sort(function(a, b) {
  var ret = a.charCodeAt(0) - b.charCodeAt(0); // 首字母处理
  if (ret == 0) {
    ret = +a.slice(1) - +b.slice(1); // 数字处理
  }
  return ret;
});

Answer 3

规则都没描述清楚，哪个排序条件的权重大一点？

Answer 4

var arr = ["B12", "A1", "A10", "A100", "A14", "A2", "A7", "B2", "C1", "C10", "C5"];
var typeSort = (function () {
    var letter = /^[A-Z]+/g;
    var number = /\d+$/g;

    function match(context, reg) {
        return (context.match(reg) || [])[0];
    }

    return function (arr) {
        return [].sort.call(arr, function (pre, next) {
            var preLetter = match(pre, letter);
            var preNumber = match(pre, number);
            var nextLetter = match(next, letter);
            var nextNumber = match(next, number);
            if (preLetter < nextLetter) {
                return -1;
            }
            if (preLetter > nextLetter) {
                return 1;
            }
            if (preLetter === nextLetter) {
                return ~~preNumber - ~~nextNumber;
            }
        });
    }
})();
console.log(typeSort(arr)); // => ["A1", "A2", "A7", "A10", "A14", "A100", "B2", "B12", "C1", "C5", "C10"]