javascript - How to elegantly alternate iterate over two arrays?-PHP Chinese Network Q&A

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javascript - How to elegantly alternate iterate over two arrays?

phpcn_u1582 2017-05-19 10:41:15

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For example, several activity pits will be inserted into a product list.

For example, there are two arrays A and B with variable lengths. It requires 6 A array elements and 1 B array element to be arranged like this

For example, even more arrays are arranged alternately

What I can think of is to convert these arrays into two-dimensional arrays like paging, then use a loop to combine them into an array, and finally traverse.

Is there a better way

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phpcn_u15822017-05-19 10:43:15 2 floor

var a = [1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 4, 5, 5, 5], b = [11,22,33,44,55]; a.reduce((acc,ele,idx) => ((idx + 1) % 3 ? acc.push(ele) : acc.push(ele, b.shift()), acc), []);

How elegant? . .

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巴扎黑2017-05-19 10:43:15 1 floor

export function join(first: T[], second: T[], firstSize: number, secondSize: number): T[] { let out: T[] = [] let i = 0 for (; firstSize * i < first.length && secondSize * i < second.length; i++) { out = out.concat( first.slice(firstSize * i, firstSize), second.slice(secondSize * i, secondSize), ) } out = out.concat(first.slice(firstSize * i), second.slice(secondSize * i)) return out }

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