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JavaScript中带示例的字符串search（）方法
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JavaScript中带示例的字符串search（）方法
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字符串search()方法 (String search() Method)
search() is method is a String method, it is used to check whether a substring exists in the given string or not. It returns the starting index of the substring from the string where substring exists. If substring does not exist in the string – it returns -1.
search()是一個String方法，用于檢查給定字符串中是否存在子字符串。 它從存在子字符串的字符串中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。
Syntax:
句法：
String.search(substring);Here, substring is the part of the string to be searched.
在此， 子字符串是要搜索的字符串的一部分。
Example:
例：
<html> <head> <title>JavaScipt Example</title> </head><body> <script> var str = "friends say Hello";var substr = "Hello"; var index = str.search(substr);if(index!=-1)document.write(substr + " found at " + index + " position.<br>");elsedocument.write(substr + " does not exist in the " + str + ".<br>");substr = "Hi";index = str.search(substr); if(index!=-1)document.write(substr + " found at " + index + " position.<br>");elsedocument.write(substr + " does not exist in the " + str + ".<br>"); </script> </body> </html>Output
輸出量
Hello found at 12 position. Hi does not exist in the friends say Hello.翻譯自: https://www.includehelp.com/code-snippets/string-search-method-with-example-in-javascript.aspx
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