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));
JavaScript
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