using slice and reduce together in javascript

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Nina
12 Apr 2019
1//subdivision Array
2function birthday(s, d, m) {
3    let count = 0
4    const length = s.length - m 
5    for(let i=0;i<=length;i++) {
6        if(s.slice(i,i+m).reduce((a,b) => a+b)=== d) {
7            count++
8        }
9    }
10    console.log(count)
11}
12birthday([1,2,1,3,2],3,2)
13
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