45 lines
934 B
JavaScript
45 lines
934 B
JavaScript
/**
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* @param {string[]} A
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* @return {string[]}
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*/
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export const commonChars = function (A) {
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const res = []
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let chars = new Set(A[0].split('')) // 不重复的chat集合
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for (let n = 1; n < A.length; n++) {
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const b = new Set(A[n].split(''))
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chars = new Set([...b].filter(x => chars.has(x)))
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}
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const maps = []
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for (let n = 0; n < A.length; n++) {
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const tmp = new Map()
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for (let i = 0; i < A[n].length; i++) {
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if (chars.has(A[n][i])) {
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if (tmp.has(A[n][i])) {
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tmp.set(A[n][i], tmp.get(A[n][i]) + 1)
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} else {
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tmp.set(A[n][i], 1)
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}
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}
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}
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maps.push(tmp)
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}
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chars = [...chars]
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for (const n in chars) {
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let min = -1
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for (const i in maps) {
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if (maps[i].get(chars[n]) < min || min === -1) {
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min = maps[i].get(chars[n])
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}
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}
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for (let x = 0; x < min; x++) {
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res.push(chars[n])
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}
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}
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return res
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}
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