This way, you can modify the number or string literal in just one place (the value of the field), instead of doing a search and replace throughout your code.
这样，在一个位置(字段的值)就可以实现对所有数字或字符串文字的修改，再也无需在整篇代码中执行查询和替代了。
It also demonstrates how to do search and replace and string splitting.
它还演示了如何进行搜索和替换以及字符串拆分。
When you want to search and replace the contents of a string.
当你要搜索并替换字符串内容时。
When specified during a search and replace operation, then sections of the character container sequence being searched that do match the regular expression, are not copied to the output string.
指定进行搜索和替换的操作中，字符容器序列中不被匹配的部分，不拷贝到输出字符。
You can use regular expressions to search for patterns in a string, replace text, and extract substrings.
您可以使用规则运算式来搜寻字串中的模式、取代文字，以及撷取子字串。
You can use regular expressions to search for patterns in a string, replace text, and extract substrings.
您可以使用规则运算式来搜寻字串中的模式、取代文字，以及撷取子字串。
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