要在浏览器中高效地操作字符串，建议。

To make string manipulation more efficient in the browser.

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提取子字符串并操作字符串的多个部分。

Extracting substrings and manipulating parts of the string.

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表达式可执行计算、操作字符或测试数据。

Expressions can perform calculations, manipulate characters, or test data.

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You don't see strings with commas between them, but it has the same kind of property. It is in ordered sequence of characters.

它是有序的字符序列,我们可以对字符串做同样的操作,我们也可以得到字符串中的一块。

麻省理工公开课 - 计算机科学及编程导论课程节选

That means starting at the first one, I'm going to do something to it. And what am I'm going to do? I'm going to take that character, convert it back into an integer, and add it into some digits. And I've done a little short hand here, which is I should have said some digits is equal to some digits plus this.

这意味着从第一个字符开始，我要对他们进行一些操作,我要去做什么呢？我要取得这个字符，然后把它转换为整数,然后加到某些数上面去,我在这里用了一些缩写,我本来应该写一个数字等于这个数字。

麻省理工公开课 - 计算机科学及编程导论课程节选