它将大字符串拆分为给定单词的小字符串。

function chunkSubstr(str, words) {
  var parts = str.split(" ") , values = [] , i = 0 , tmpVar = "";
  $.each(parts, function(index, value) {
      if(tmpVar.length < words){
          tmpVar += " " + value;
      }else{
          values[i] = tmpVar.replace(/\s+/g, " ");
          i++;
          tmpVar = value;
      }
  });
  if(values.length < 1 &&  parts.length > 0){
      values[0] = tmpVar;
  }
  return values;
}

你可以这样做:

"1234567890".match(/.{1,2}/g);
// Results in:
["12", "34", "56", "78", "90"]

如果字符串的大小不是chunk-size的倍数，该方法仍然有效:

"123456789".match(/.{1,2}/g);
// Results in:
["12", "34", "56", "78", "9"]

一般来说，对于任何你想要提取最多n个子字符串的字符串，你可以这样做:

str.match(/.{1,n}/g); // Replace n with the size of the substring

如果你的字符串可以包含换行符或回车，你会这样做:

str.match(/(.|[\r\n]){1,n}/g); // Replace n with the size of the substring

至于性能，我用了大约10k个字符，在Chrome上花了一秒钟多一点的时间。YMMV。

这也可以用在可重用函数中:

function chunkString(str, length) {
  return str.match(new RegExp('.{1,' + length + '}', 'g'));
}

你绝对可以做一些

let pieces = "1234567890 ".split(/(.{2})/).filter(x => x.length == 2);

要得到这个:

[ '12', '34', '56', '78', '90' ]

如果你想动态输入/调整数据块的大小，使数据块的大小为n，你可以这样做:

n = 2;
let pieces = "1234567890 ".split(new RegExp("(.{"+n.toString()+"})")).filter(x => x.length == n);

要在原始字符串中找到所有大小为n的块，尝试这样做:

let subs = new Set();
let n = 2;
let str = "1234567890 ";
let regex = new RegExp("(.{"+n.toString()+"})");     //set up regex expression dynamically encoded with n

for (let i = 0; i < n; i++){               //starting from all possible offsets from position 0 in the string
    let pieces = str.split(regex).filter(x => x.length == n);    //divide the string into chunks of size n...
    for (let p of pieces)                 //...and add the chunks to the set
        subs.add(p);
    str = str.substr(1);    //shift the string reading frame
}

你应该得到:

[ '12', '23', '34', '45', '56', '67', '78', '89', '90', '0 ' ]

惊喜!你可以使用split来分割。

var parts = "1234567890 ".split(/(.{2})/).filter(O=>O)

结果显示['12'，'34'，'56'，'78'，'90'，' ']

它将大字符串拆分为给定单词的小字符串。

function chunkSubstr(str, words) {
  var parts = str.split(" ") , values = [] , i = 0 , tmpVar = "";
  $.each(parts, function(index, value) {
      if(tmpVar.length < words){
          tmpVar += " " + value;
      }else{
          values[i] = tmpVar.replace(/\s+/g, " ");
          i++;
          tmpVar = value;
      }
  });
  if(values.length < 1 &&  parts.length > 0){
      values[0] = tmpVar;
  }
  return values;
}

function chunkString(str, length = 10) {
    let result = [],
        offset = 0;
    if (str.length <= length) return result.push(str) && result;
    while (offset < str.length) {
        result.push(str.substr(offset, length));
        offset += length;
    }
    return result;
}