Question

我有一个数组和一个正则表达式：

var array = ['dog and cat', 'cat and dog', 'horse', 'snake is dangerous'];
var regex = /^((dog)?(snake)?(horse)?(cat)?)/g;
//final output:
var array = ['dog and cat', 'snake is dangerous', 'horse', 'cat and dog'];

如何命令此数组具有所需效果？

修改：我发明了一个解决方案：

var array = ['dog','cat']; var re-order = [];
i=0;
while(array[i]){
    if(string.test(array[i])){
        re-order[i] = array[i];
    }
    i++;
}

Answer 1

试试这个：

function getSortValue(str) {
  return sortOrder.reduce(
    (val, key, idx) => {
      let temp = str.substr(0,key.length);
      return (temp === key) ? idx+1 : val;
    }, 0
  );
}

function sortMe(a,b) {
  var a1 = getSortValue(a);
  var b1 = getSortValue(b);
  if (a1 < b1) {
    return -1;
  } else if (a1 > b1) {
    return 1;
  }
  if (a < b) {
    return -1;
  } else if (a > b) {
    return 1;
  }
  return 0;
}

var sortOrder = ['dog','snake','horse','cat'];
var array = ['dog and cat', 'cat and dog', 'horse', 'snake is dangerous', 'dog and bird', 'cat and fish'];
console.log(array);
array.sort(sortMe)
console.log(array);

结果：

在：

["dog and cat", "cat and dog", "horse", "snake is dangerous", "dog and bird", "cat and fish"]

后：

["dog and bird", "dog and cat", "snake is dangerous", "horse", "cat and dog", "cat and fish"]

函数getSortValue根据字符串和首选顺序将字符串转换为索引。然后函数sortMe根据这些值进行排序，如果值相同，则对我的字符串比较进行排序。

此代码不会检查dog vs dogs或dogfood等完整字词，但这些字词应由sortMe函数的字符串比较部分处理

使用正则表达式重新排序数组

1 个答案:

结果：