寻找特定字母在 JavaScript 语句中出现的次数
我们需要编写一个 JavaScript 函数,该函数查找特定字母在语句中出现的次数。
举例说明
代码如下 −
const string = 'This is just an example string for the program'; const countAppearances = (str, char) => { let count = 0; for(let i = 0; i < str.length; i++){ if(str[i] !== char){ // using continue to move to next iteration continue; }; // if we reached here it means that str[i] and char are same // so we increase the count count++; }; return count; }; console.log(countAppearances(string, 'a')); console.log(countAppearances(string, 'e')); console.log(countAppearances(string, 's'));
输出
控制台中的输出 −
3 3 4
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