consttext="JavaScript is a versatile language. Learning JavaScript makes you a powerful developer.";functionstringSearch(text,term){if(text.includes(term)){console.log(`"${term}" found in string.`);}else{console.log(`"${term}" not found in string.`);}constindex=text.indexOf(term);conso...
string.search(search_expression); Parameters or Arguments search_expression It is either a string value or a RegExp object that will be searched for instring. As a RegExp object, it can be a combination of the following: ValueDescription ...
JavaScript String match() Thematch()method returns an array containing the results of matching a string against a string (or a regular expression). Examples Perform a search for "ain": lettext ="The rain in SPAIN stays mainly in the plain"; ...
search()方法执行正则表达式和String对象之间的一个搜索匹配。 语法 代码语言:javascript 复制 str.search(regexp) 参数 regexp一个正则表达式(regular expression)对象。如果传入一个非正则表达式对象,则会使用 new RegExp(obj) 隐式地将其转换为正则表达式对象。
search() is method 是一個 String 方法,用於檢查給定字符串中是否存在子字符串。它從子字符串所在的字符串返回子字符串的起始索引。如果字符串中不存在子字符串 – 則返回 -1。 用法: String.search(substring); 這裏,substring是要搜索的字符串的一部分。
In this tutorial, we will learn about the JavaScript String search() method with the help of examples.The search() method searches for a specific string or a regular expression in the string.
log(myString.replace(new RegExp( "999", "gi" ), "The")); //output: The JavaScript Coders 9. search(regexp) search() 方法用于检索字符串中指定的子字符串,或检索与正则表达式相匹配的子字符串,如果找到,返回与 regexp 相匹配的子串的起始位置,否则返回 -1。 代码语言:javascript 代码运行次数:0...
In JavaScript, a regular expression text search, can be done with different methods. With apatternas a regular expression, these are the most common methods: ExampleDescription text.match(pattern)The String method match() text.search(pattern)The String method search() ...
可以使用String作为toString()更可靠的代替方法,因为它在用于null和undefined时仍然有效。例如: js constnullVar=null;nullVar.toString();// TypeError: nullVar is nullString(nullVar);// "null"constundefinedVar=undefined;undefinedVar.toString();// TypeError: undefinedVar is undefinedString(undefinedVar);/...
"JavaScript".search("Script") ---> 返回4. replace() : 替换字符串。 "JavaScript".replace("cri","heihei") ---> JavaSheiheipt 2.Array ECMAScript数组和其他语言中的数组都是有序列表,但是有以下特性: a.每一项都可以保存任何类型的数据。 b....