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Home/ Questions/Javascript count character in string samples
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James Portman
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James Portman
Asked: April 16, 20222022-04-16T10:32:54+00:00 2022-04-16T10:32:54+00:00In: javascript

Javascript count character in string samples

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I’m interested in “Javascript count character in string”. But there are many different sources on the Internet, if you have any specific examples, please share them with me. Thank you very much!

♦ Suggestions of ITtutoria Team

Ideas for “Javascript count character in string”: The code to count all characters in string.

function countAllChars(str) {
var a = str.split("");
var obj = {};
a.forEach(function(s){
 var count=0;
 for(var j=0;j<a.length;j++){
 if(s==a[j]){
  count+=1;
 }
obj[a[j]]=count;
}
});
return obj;
}
console.log(countAllCharacters('ittutoria'));
Result: { i: 2, t: 3, u: 1, o: 1, a: 1 } 
count characterstring
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  1. Best Answer
    Michelle Gagnon
    2022-04-16T10:32:57+00:00Added an answer on April 16, 2022 at 10:32 am

    This is my approach

    var temp = "This is a string.";
    var count = (temp.match(/is/g) || []).length;
    console.log(count);
    ​
    Output: 2
    ​
    Explaination : The g in the regular expression (short for global) says to search the whole string rather than just find the first occurrence. This matches 'is' twice.
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  2. Kyle Roy
    2022-04-16T10:33:10+00:00Added an answer on April 16, 2022 at 10:33 am

    Here is my code, you can try

    function count (string) {  
      var count = {};
      string.split('').forEach(function(s) {
         count[s] ? count[s]++ : count[s] = 1;
      });
      return count;
    }
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  3. Susan Wang
    2022-04-16T10:33:04+00:00Added an answer on April 16, 2022 at 10:33 am

    You can try this way

    var colors = ["Red", "Orange", "Blue", "Green"];
    var colorsLength=colors.length;//4 is colors array length 
    ​
    var str = "bug";
    var strLength=str.length;//3 is the number of characters in bug
    • 21
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  4. Alexander Evans
    2022-04-16T10:33:07+00:00Added an answer on April 16, 2022 at 10:33 am

    This is my example

    "this is foo bar".split("o").length - 1;
    // returns 2
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  5. Joseph Davis
    2022-04-16T10:33:16+00:00Added an answer on April 16, 2022 at 10:33 am

    This is the command I use, you can try

    var str="hello";
    var n str.lenbth;
    console(n);
    ​
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  6. Liam O'Kelly
    2022-04-16T10:33:13+00:00Added an answer on April 16, 2022 at 10:33 am

    You can try this way

    var str = "Hello World!";
    var n = str.length; 
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