Counting how many duplicates are in array?

Question

How can I count how many times wordToCount are in the phrasesToCheck. And how to put this number to counter variable ?

let counter = [];
let wordToCount = ["tomato","cat"];
let phrasesToCheck = ['my cat like potatoes','cat like apple','my golden fish like tomato'];

counter[0] = 1; //tomato
counter[1] = 2; //cat

the title and body of your question read like two different questions — Jaromanda X, Mar 26 '20 at 08:55
by determining what your question actually is ... do you want to remove something from an array, or do you want to count something in an array? - I've answered the latter below - hope it helps — Jaromanda X, Mar 26 '20 at 09:05

score 0 · Accepted Answer · answered Mar 26 '20 at 09:00

0

let wordToCount = ["tomato","cat"];
let phrasesToCheck = ['my cat like potatoes','my cat like apple','my golden fish like tomato'];
let allwords = phrasesToCheck.join(' ').split(' ');
let counter = wordToCount.map(word => allwords.reduce((acc, v) => acc += v === word, 0));
console.log(counter);

answered Mar 26 '20 at 09:00

Jaromanda X

53,868
5
73
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But what if i want to find two words like "my cat" ? – pawel szewczyk Mar 26 '20 at 09:25
that's not what you asked - it pays to be specific – Jaromanda X Mar 26 '20 at 09:39

Counting how many duplicates are in array?

1 Answers1