Question

我想在每隔三个空格分割字符串。例如：

var str = 'Lorem ipsum dolor sit amet consectetur adipiscing elit sed do eiusmod tempor incididunt';
//result will be:
var result = ["Lorem ipsum dolor ", "sit amet consectetur ", "adipiscing elit sed ", "do eiusmod tempor ", "incididunt"];

请帮帮我。谢谢

Answer 1

使用正则表达式分割字符串。

＆＃13;

var str = 'Lorem ipsum dolor sit amet consectetur adipiscing elit sed do eiusmod tempor incididunt';
var splited = str.match(/\b[\w']+(?:[^\w\n]+[\w']+){0,2}\b/g);
console.log(splited);

＆＃13;

正则表达式说明：

 1. \b assert position at a word boundary (^\w|\w$|\W\w|\w\W)

 2. Match a single character present in the list below [\w']+
         \w matches any word character (equal to [a-zA-Z0-9_])

 3. {0,2} Quantifier — Matches between 0 and 2 times

 4. Match a single character not present in the list below [^\w\n]

 5. \w matches any word character (equal to [a-zA-Z0-9_])

 6. \n matches a line-feed (newline) character (ASCII 10)

 7. Match a single character present in the list below [\w']

 8. \w matches any word character (equal to [a-zA-Z0-9_])

 9. ' matches the character ' literally (case sensitive)

 10. \b assert position at a word boundary (^\w|\w$|\W\w|\w\W)

 11. g modifier: global. All matches (don't return after first match)

Answer 2

var str = 'Lorem ipsum dolor sit amet consectetur adipiscing elit sed do eiusmod tempor incididunt';
var splitString = str.match(/(.*?\s){3}/g);
console.log(splitString);

Answer 3

点击https://regex101.com/r/npQt7X/1

或

const regex = /\b[\w']+(?:[^\w\n]+[\w']+){0,2}\b/g;
const str = `Lorem ipsum dolor sit amet consectetur adipiscing elit sed do eiusmod tempor incididunt`;
let m;

while ((m = regex.exec(str)) !== null) {
    // This is necessary to avoid infinite loops with zero-width matches
    if (m.index === regex.lastIndex) {
        regex.lastIndex++;
    }

    // The result can be accessed through the `m`-variable.
    m.forEach((match, groupIndex) => {
        console.log(`Found match, group ${groupIndex}: ${match}`);
    });
}

Answer 4

正则表达式很好，但难以解释并且难以阅读。

因此，只有在没有其他解决方案时才使用正则表达式。

反对这些正则表达式的论据是参数的硬编码。

var str = 'Lorem ipsum dolor sit amet consectetur adipiscing elit sed do eiusmod tempor incididunt';

var splitMyString = (str, splitLength) => {
  var a = str.split(' '), b = [];
  while(a.length) b.push(a.splice(0,splitLength).join(' '));
  return b;
}
console.log(splitMyString(str,3));

Javascript每隔三个空格分割字符串

4 个答案: