In bothreplace()methods, the first occurrence ofJavais replaced withJavaScript. Example 2: Replace all occurrences To replace all occurrencesof thepattern, you need to use a regex with agswitch (global search). For example,/Java/ginstead of/Java/. consttext ="Java is awesome. Java is fun....
如果您要查找的内容已经在字符串中,并且您没有方便的regex escaper,则可以使用join/split: function replaceMulti(haystack, needle, replacement) { return haystack.split(needle).join(replacement); } someString = 'the cat looks like a cat'; console.log(replaceMulti(someString, 'cat', 'dog'));Run ...
甚至更简单:String.prototype.replaceAll(find, replace) { return this.replace(new RegExp(find.replace(/([.*+?^=!:${}()|\[\]\/\\])/g,"\\$1"),"g"), replace); }实际上:"abcdefgabcd323".replaceAll("abc","1") // Returns"1defg1d323 扩展JavaScript原生类型的原型是不好的做法。 为...
The plus symbol + matches one or more occurrences of the pattern left to it. ExpressionStringMatched? ma+n mn No match (no a character) man 1 match mann 1 match main No match (a is not followed by n) woman 1 match ? - Question Mark The question mark symbol ? matches zero or one...
consttext ="javaSCRIPT JavaScript";// all occurrences of javascript is replacedletpattern =/javascript/gi;// case-insensitive and global searchletnew_text = text.replaceAll(pattern,"JS");console.log(new_text);// JS JS 输出 JS JS 示例3:传递函数作为替换 ...
The g character is a flag that finds all occurrences of a term. $ node replacing.js He has grey hair; grey clouds gathered above us. JS regex case insensitive matchTo enable case insensitive search, we use the i flag. case_insensitive.js ...
D. Replaces all occurrences Show Answer 4. Which method retrieves the matched results from a string when using a regex? A. match() B. replace() C. split() D. search() Show Answer 5. What does the 'm' flag signify in a regular expression? A. Multiline input B. Match...
五、String.prototype.replace(search, replacement) 存在两个参数: search, replacement search: 字符串或者正则表达式。 1) 字符串: 在字符串中找到匹配的字面量,只能替换一次出现的匹配项,暂不存在 (replaceAll函数),想要替换多次出现的匹配项,必须使用正则表达式/g标识。
Regex Flags Regex flags are used to modify the behavior of the pattern matching. The following are commonly used flags: g: (global) Matches all occurrences of the pattern in the input string. This is the default flag if no flag is provided. ...
One peculiar thing I find in Javascript is thatString.replaceonly replaces the first instance of the substring, unless you use aRegex. Fortunately I found a clever little pattern to do this withoutRegex:String.split(subString).join(replaceString). ...