JavaScript擷取兩個數組交集的方法

 　　本文執行個體講述了JavaScript擷取兩個數組交集的方法。分享給大家供大家參考。具體如下：

　　這裡傳入的數組必須是已經排過序的

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/* finds the intersection of * two arrays in a simple fashion. * * PARAMS * a - first array, must already be sorted * b - second array, must already be sorted * * NOTES * * Should have O(n) operations, where n is * n = MIN(a.length(), b.length()) */ function arrayIntersection(a, b) { var ai=0, bi=0; var result = new Array(); while( ai < a.length && bi < b.length ) { if (a[ai] < b[bi] ){ ai++; } else if (a[ai] > b[bi] ){ bi++; } else /* they're equal */ { result.push(a[ai]); ai++; bi++; } } return result; } console.log(arrayIntersection([1,2,3],[2,3,4,5,6]));//[2,3]

　　希望本文所述對大家的javascript程式設計有所協助。