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29 lines
809 B
JavaScript
29 lines
809 B
JavaScript
function array_binarySearch(narray, delement) {
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var mposition = Math.floor(narray.length / 2);
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if (narray[mposition] === delement){
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return mposition;
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}
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else if (narray.length === 1)
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{
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return null;
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}
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else if (narray[mposition] < delement) {
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var arr = narray.slice(mposition + 1);
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var res = array_binarySearch(arr, delement);
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if (res === null)
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{
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return null;
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}
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else {
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return mposition + 1 + res;
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}
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}
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else {
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var arr1 = narray.slice(0, mposition);
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return array_binarySearch(arr1, delement);
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}
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}
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var myArray = [1, 2, 3, 5, 6, 7, 10, 11, 14, 15, 17, 19, 20, 22, 23];
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console.log(array_binarySearch(myArray, 6));
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