如何在不拆分单词的情况下将字符限制设置为100

How can I set a character limit of 100 without splitting words?

本文关键字：字符 设置 情况下 拆分 单词      更新时间：2023-09-26

我想每100个字符剪切一个字符串，而不剪切单词。

var TmpArray=[];
var str = 'this string will be cut up after every 100 characters but it will cut into words';
str=str.replace(/[^a-z A-Z0-9]+/g, '');
str = str.replace(/'s{2,}/g, ' ');
var sp=(str.match(new RegExp(" ", "g")) || []).length;
var max=100;
//Spaces will be converted into %20 (later) so each space must count as 3 characters.
var FoundSpaces=sp*3;
var tmp=max-FoundSpaces;
var cut=str.match(new RegExp('.{1,'+tmp+'}', 'g'));
for (i = 0; i < cut.length; i++){
    TmpArray.push(cut[i]);
}
console.log(TmpArray);

输出：["this string will be cut up after every 100 characters b", "ut it will cut into words"]

那么，我该如何防止它像以前那样分裂单词呢？

有趣的问题。我将再提出一个如何仅使用数组方法的实现，split+reduce:的组合

var str = 'This example of the string that we want to split by spaces only making sure that individual chunk is less or equal to specified number.';
// Split by spaces
str.split(/'s+/)
// Then join words so that each string section is less then 40
.reduce(function(prev, curr) {
    if (prev.length && (prev[prev.length - 1] + ' ' + curr).length <= 40) {
        prev[prev.length - 1] += ' ' + curr;
    }
    else {
        prev.push(curr);
    }
    return prev;
}, [])
// Print for testting
.forEach(function(str) {
    console.log(str + ' ' + str.length);
});

在这个例子中，我设置了40个字符的最大长度。

输出：

This example of the string that we want 39
to split by spaces only making sure that 40
individual chunk is less or equal to 36
specified number. 17

还有一个演示：http://jsfiddle.net/9tgo6n1t/

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