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检查字符串中字符的出现次数. JavaScript

检查字符串中字符的出现次数. JavaScript

#check #JavaScript 


使用 for 循环检查字符的出现
JavaScript example code

JavaScript

  Output result 
Enter a string: school
Enter a  letter to check: o
2
使用正则表达式检查字符的出现
JavaScript example code

JavaScript

  Output result 
Enter a string: school
Enter a  letter to check: o
2
code examples and answer to questions in JavaScript programming luaguage

JavaScript

JavaScript 编程语言中的代码示例和问题解答

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