Question

我试图分离并将一个数组的所有单词推送到另一个数组中。

旧数组：

["black cat", "white dog", "grey mouse"]

预期数组：

["black"],["cat"],["white"],["dog"],["grey"],["mouse"]

使用我的代码，我仍然用逗号分隔我的3个数组：

var arr = ["black cat", "white dog", "grey mouse"];
var arr_new = [];

for (i = 0; i < arr.length; i++) {
   curr_val = arr[i].split(" ");
   arr_new.push(curr_val);
}

Answer 1

这是因为方法split返回一个数组，其中的单词是用空格分割的。解决方案是迭代这个新数组而不是数组中的insert（push）。

var arr = ["black cat", "white dog", "grey mouse"];
var arr_new = [];

for (i = 0; i < arr.length; i++) {
   curr_val = arr[i].split(" ");
   for(j=0; j<curr_val.length;j++){
      arr_new.push(curr_val[j]);
   }
}

Answer 2

我就是这样做的：

var oldArr = ["black cat", "white dog", "grey mouse"];

var newArr = oldArr
  
  // this will turn each string into an Array of Arrays, like this:
  // [["black", "cat"], ["white", "dog"], ["grey", "mouse"]]
  .map(function(item) {
    return item.split(" ");
  })

  // then, flatten this Array of Arrays into a single-level Array.
  // see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/Reduce#Flatten_an_array_of_arrays
  .reduce(function(a, b) {
    return a.concat(b);
  }, []);

document.writeln(JSON.stringify(newArr))

Answer 3

JSFiddle：https://jsfiddle.net/6hLazr5w/1/

var newArray=[],
    oldArray = ["black cat", "white dog", "grey mouse"];

for(item in oldArray) {
  tmpArray = oldArray[item].split(' ');
  for(tmp in tmpArray) {
    newArray.push(tmpArray[tmp]);
  }
}

Answer 4

这里有一个减少＆amp; amp;的选项替换方法，

＆＃13;

var a = ["black cat", "white dog", "grey mouse"] 

var re = a.reduce((acc,x)=>{
  x.replace(/[a-zA-z]+/g,function(m){
    acc.push([m])
  });
  return acc;


},[])

console.log(re)

＆＃13;

从数组中获取所有单个单词

4 个答案: