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  1. Lonely Integer
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Lonely Integer

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  • lokeshjai902
     + 0 comments

    def lonelyinteger(a): for i in a: if a.count(i)==1: return i

  • ihabsohaila66
     + 0 comments
    def lonelyInteger (a):
sortedA = sorted(a)  
lonelyInteger = 0
for i in range(0,len(sortedA)):
	lonelyInteger ^= sortedA[i]
        
return lonelyInteger

  • pedro4ai
     + 0 comments

    This is a simple solution in python, reduce applies a accumulative operation to all elements in the list into a single value Python:

    from functools import reduce
from operator import ixor

def lonelyinteger(a):
    return reduce(ixor, a)

  • evanmico222
     + 0 comments

    Single line js solution: 

    const lonelyinteger = (a) => (a.reduce((x, y) => x^=y));

  • karlasanchez0424
     + 0 comments

    golang solution using XOR:

    func lonelyinteger(a []int32) int32 {
    var unique int32 = 0
    
    for _, i := range a{
        unique ^= i
    }
    
    return unique

}