1.Two sum

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let nums = [2,7,11,15]; let target = 9; var twoSum = function(nums, target) { return nums.filter((el,ind)=>{ let newInd = nums.indexOf(target-el); if(newInd != -1 && newInd != ind ){ return [ind,newInd]; } }); }; console.log(twoSum(nums,target));
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