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Given array : 

var arr = [ 'male01', 'woman01', 'male02', 'kid01', 'kid02', 'male06'];

How to count the number of male in that array ?

Expected result : 3.

Note: I just edited the problem to make it simpler.

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5

4 Answers 4

Reset to default
5

Try following

var arr = [ 'male01', 'woman01', 'male02', 'kid01', 'kid02', 'male06'];

console.log(arr.filter((item) => item.startsWith('male')).length);

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5 Comments

@NinaScholz - Agreeing it to be a better way. Updated. Thanks.
How do you know all the occurrences are at the start of the word? I would instead use String.prototype.includes()
@YosvelQuintero - Makes sense, however, as per the data provided, the above will work well too. Thank you.
Given the number of -1 on my question I'am going to delete this question. Please report your answer to Javascript: search string in array then count occurrences or Count instances of string in an array so I can +1 your elegant answer.
No worries. Thank you for the warning
2 
var arr = [ 'male01', 'woman01', 'male02', 'kid01', 'kid02', 'male06'];
var count=0;
for(var i=0;i<arr.length;i++)
{
if(arr[i].indexOf('male')>-1)
    count++;
}
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Comments

2

You can also use regular expressions and the String.prototype.match()

Code:

const arr = ['male01', 'woman01', 'male02', 'kid01', 'kid02', 'male06'];
const count = arr.toString().match(/male/g).length;

console.log(count);

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3 Comments

Given the number of -1 on my question I'am going to delete this question. Please report your answer to Javascript: search string in array then count occurrences or Count instances of string in an array so I can +1 your elegant answer.
I have market you question as Favorite and given the +1.. But is ok, you can delete and use the solution on your personal project.. Thanks for the message
I didn't expected my answer to be down voted. Thanks for your code it's indeed the level of elegance I was looking for !
0

You need to iterate upto length of array if string found increment the value of counter. Like following.

var arr = [ 'male01', 'woman01', 'male02', 'kid01', 'kid02', 'male06'];
var stringCount = 0;
for(var i=0;i<arr.length;i++)
{
   if(arr[i].indexOf('male')>-1){
      stringCount++;
   }
}
console.log(stringCount);

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1 Comment

Please refrain from copy pasting other people's answer

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