正如标题所说，我有一个字符串，我想把它分成n个字符的片段。
例如:
var str = 'abcdefghijkl';
当n=3时，它会变成
var arr = ['abc','def','ghi','jkl'];
有办法做到这一点吗?
当前回答
str.match(/.{3}/g); // => ['abc', 'def', 'ghi', 'jkl']
其他回答
基于之前对这个问题的回答;下面的函数将分割一个字符串(str) n-number (size)的字符。
function chunk(str, size) {
return str.match(new RegExp('.{1,' + size + '}', 'g'));
}
Demo
(function() { function chunk(str, size) { return str.match(new RegExp('.{1,' + size + '}', 'g')); } var str = 'HELLO WORLD'; println('Simple binary representation:'); println(chunk(textToBin(str), 8).join('\n')); println('\nNow for something crazy:'); println(chunk(textToHex(str, 4), 8).map(function(h) { return '0x' + h }).join(' ')); // Utiliy functions, you can ignore these. function textToBin(text) { return textToBase(text, 2, 8); } function textToHex(t, w) { return pad(textToBase(t,16,2), roundUp(t.length, w)*2, '00'); } function pad(val, len, chr) { return (repeat(chr, len) + val).slice(-len); } function print(text) { document.getElementById('out').innerHTML += (text || ''); } function println(text) { print((text || '') + '\n'); } function repeat(chr, n) { return new Array(n + 1).join(chr); } function textToBase(text, radix, n) { return text.split('').reduce(function(result, chr) { return result + pad(chr.charCodeAt(0).toString(radix), n, '0'); }, ''); } function roundUp(numToRound, multiple) { if (multiple === 0) return numToRound; var remainder = numToRound % multiple; return remainder === 0 ? numToRound : numToRound + multiple - remainder; } }()); #out { white-space: pre; font-size: 0.8em; } <div id="out"></div>
我最喜欢的答案是gouder hicham的。但我稍微修改了一下，让它更有意义。
let myString = "Able was I ere I saw elba";
let splitString = [];
for (let i = 0; i < myString.length; i = i + 3) {
splitString.push(myString.slice(i, i + 3));
}
console.log(splitString);
下面是该代码的一个功能化版本。
function stringSplitter(myString, chunkSize) {
let splitString = [];
for (let i = 0; i < myString.length; i = i + chunkSize) {
splitString.push(myString.slice(i, i + chunkSize));
}
return splitString;
}
以及函数的用法:
let myString = "Able was I ere I saw elba";
let mySplitString = stringSplitter(myString, 3);
console.log(mySplitString);
结果是:
>(9) ['Abl', 'e w', 'as ', 'I e', 're ', 'I s', 'aw ', 'elb', 'a']
const chunkStr = (str, n, acc) => {
if (str.length === 0) {
return acc
} else {
acc.push(str.substring(0, n));
return chunkStr(str.substring(n), n, acc);
}
}
const str = 'abcdefghijkl';
const splittedString = chunkStr(str, 3, []);
干净的解决方案没有REGEX
var str = 'abcdefghijkl';
var res = str.match(/.../g)
console.log(res)
这里点的数量决定了你想在每个单词中包含多少文本。
function str_split(string, length = 1) {
if (0 >= length)
length = 1;
if (length == 1)
return string.split('');
var string_size = string.length;
var result = [];
for (let i = 0; i < string_size / length; i++)
result[i] = string.substr(i * length, length);
return result;
}
str_split(str, 3)
基准测试:http://jsben.ch/HkjlU(不同浏览器的结果不同)
结果(Chrome 104)
