最新下载
热门教程
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
JavaScript 中的replace方法
时间:2022-06-30 11:22:51 编辑:袖梨 来源:一聚教程网
1第一次发现JavaScript中replace() 方法如果直接用str.replace("-","!") 只会替换第一个匹配的字符.
2而str.replace(/-/g,"!")则可以替换掉全部匹配的字符(g为全局标志)。
3
4
5replace()
6The replace() method returns the string that results when you replace text matching its first argument
7(a regular expression) with the text of the second argument (a string).
8If the g (global) flag is not set in the regular expression declaration, this method replaces only the first
9occurrence of the pattern. For example,
10
11var s = "Hello. Regexps are fun.";s = s.replace(/./, "!"); // replace first period with an exclamation pointalert(s);
12
13produces the string “Hello! Regexps are fun.” Including the g flag will cause the interpreter to
14perform a global replace, finding and replacing every matching substring. For example,
15
16var s = "Hello. Regexps are fun.";s = s.replace(/./g, "!"); // replace all periods with exclamation pointsalert(s);
17
18yields this result: “Hello! Regexps are fun!”
2而str.replace(/-/g,"!")则可以替换掉全部匹配的字符(g为全局标志)。
3
4
5replace()
6The replace() method returns the string that results when you replace text matching its first argument
7(a regular expression) with the text of the second argument (a string).
8If the g (global) flag is not set in the regular expression declaration, this method replaces only the first
9occurrence of the pattern. For example,
10
11var s = "Hello. Regexps are fun.";s = s.replace(/./, "!"); // replace first period with an exclamation pointalert(s);
12
13produces the string “Hello! Regexps are fun.” Including the g flag will cause the interpreter to
14perform a global replace, finding and replacing every matching substring. For example,
15
16var s = "Hello. Regexps are fun.";s = s.replace(/./g, "!"); // replace all periods with exclamation pointsalert(s);
17
18yields this result: “Hello! Regexps are fun!”
相关文章
- 第五人格佣兵护腕怎么用 第五人格佣兵护腕教学 04-28
- 崩铁星穹列车年度开拓报告活动怎么玩 星穹列车年度开拓报告网页活动介绍 04-28
- 逆水寒手游五子棋残局三十二怎么过 04-28
- 崩坏星穹铁道齐颂给谁用 04-28
- 火影忍者手游旋涡鸣人仙人模式怎么玩 04-28
- 原神怎么破坏磐键 原神破坏磐键的方法 04-28