JavaScript String search() Thesearch()method searches a string for a string (or a regular expression) and returns the position of the match: Examples lettext ="Please locate where 'locate' occurs!"; text.search("locate"); Try it Yourself » ...
❮PreviousJavaScript StringReferenceNext❯ Examples Search for "Blue": lettext ="Mr. Blue has a blue house"; letposition = text.search("Blue"); Try it Yourself » Search for "blue": lettext ="Mr. Blue has a blue house";
search() match() 高级字符串搜索算法 KMP算法(Knuth-Morris-Pratt) 实现数据采集的字符串搜索 细节 基本字符串方法 indexOf() indexOf()方法返回在调用该方法的字符串中找到的第一个子字符串的索引,如果未找到,则返回-1。 let text = "hello world"; let searchString = "world"; console.log(text.index...
语法:stringobj.search(rgExp) 例子: 3.replace()方法 语法:replace(rgExp.replaceText) 例子: 4.split()方法 语法:split([separator[,limit]]) 1.match()方法 match()方法使用正则表达式模式对字符串进行查找,并将包含查找的结果作为数组返回。 语法:stringobj.match(rgExp) stringobj:必选项。对其进行查找的...
基本字符串方法let text = "hello world"; let searchString = "world"; console.log(text.indexOf(searchString)); // 输出:6includes()includes()方法检查一个字符串是否包含另一个子字符串,返回布尔值。let text = "hello world"; let searchString = "world"; console.log(text.includes(searchString)...
search() Searches for a string and returns the position of a match. To learn more, visit JavaScript String methods. Example: JavaScript String Methods let text1 = "hello"; let text2 = "world"; let text3 = " JavaScript "; // concatenate two strings let result1 = text1.concat(' '...
3. search(str):与indexOf()的功能相似,查找某一个字符串在目标字符串中第一次出现的位置,但是不能指定开始查找的位置。但是他的参数既可以是字符串,又可以是正则表达式。返回值:-1表示没有查找到。 varstr ="feichang"; varres = str.search("cha"); if(res ...
Select the Search in comments and strings and Search for text occurrences checkboxes to rename the usages of the symbol in comments, string literals, and text. By default, the symbol is renamed in the entire project. You can select another scope from the list. Rename constants In the...
// JavaScript's most important datatype is the object.// An object is a collection of name/value pairs, or a string to value map.letbook={// Objects are enclosed in curly braces.topic:"JavaScript",// The property "topic" has value "JavaScript."edition:7// The property "edition" has...
阅读下面的JavaScript代码: < HTML > < BODY > < SCRIPT type="text/javascript" > function f(y) { var x=y*y; return x; } for(x=0;x< 5;x++) { y=f(x); document.writeln(y); } < /SCRIPT > < /BODY > < /HTML > 输出结果是()。 A. 0 1 2 3 4 B. 0 1 4 9 16 C. ...