| 1. | Zero - width negative lookahead assertion
零宽度负预测先行断言。 |
| 2. | Zero - width positive lookahead assertion
零宽度正预测先行断言。 |
| 3. | Nonbacktracking lookahead and lookbehind
非回溯预测先行和追溯 |
| 4. | Provides information about regular expression lookahead and lookbehind behavior
提供关于正则表达式预测先行和追溯行为的信息。 |
| 5. | Assertions do not change : lookahead looks to the right ; lookbehind looks to the left
断言不改变：预测先行向右搜索；回顾后发向左搜索。 |
| 6. | A subexpression that performs a positive lookahead search , which matches the string at any point where a string matching
执行正向预测先行搜索的子表达式，该表达式匹配处于匹配 |
| 7. | The following regular expression , which is an example of a positive lookahead , matches windows 95 , windows 98 , and windows nt
下面的正则表达式（这是一个正向预测先行的示例）匹配windows 95 、 windows 98和windows nt ： |
| 8. | Once a match is found , the search for the next match begins immediately following the matched text without including the characters in the look - ahead
找到一处匹配后，紧接着就在匹配的文本（不包括预测先行中的字符）之后搜索下一处匹配。 |
| 9. | A positive lookahead , which is specified using ? , matches the search string at any point where a matching regular expression pattern in parentheses begins
正向预测先行使用? =指定，它匹配处于括号中匹配正则表达式模式的起始点的搜索字符串。 |
| 10. | Grouping constructs delineate subexpressions of a regular expression and typically capture substrings of an input string . the following table describes the regular expression grouping constructs
分组构造使您可以捕获子表达式组并提高具有非捕获预测先行和回顾后发修饰符的正则表达式的效率。 |
