尋找特定字母在 JavaScript 語句中出現的次數
我們需要編寫一個 JavaScript 函式,該函式查詢特定字母在語句中出現的次數。
舉例說明
程式碼如下 −
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'));輸出
控制檯中的輸出 −
3 3 4
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