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Add: Hamming Distance

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Lines changed: 8 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -1 +1,9 @@`
`1`	`1`	`package hamming_distance`
	`2`	`+`
	`3`	`+func hammingDistance(x int, y int) int {`
	`4`	`+ ans, n := 0, x^y`
	`5`	`+ for n > 0 {`
	`6`	`+ ans, n = ans+1, n&(n-1)`
	`7`	`+ }`
	`8`	`+ return ans`
	`9`	`+}`

Lines changed: 24 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -1 +1,25 @@`
`1`	`1`	`package hamming_distance`
	`2`	`+`
	`3`	`+import "testing"`
	`4`	`+`
	`5`	`+type caseType struct {`
	`6`	`+ x int`
	`7`	`+ y int`
	`8`	`+ expected int`
	`9`	`+}`
	`10`	`+`
	`11`	`+func TestHammingDistance(t *testing.T) {`
	`12`	`+ tests := [...]caseType{`
	`13`	`+ {`
	`14`	`+ x: 1,`
	`15`	`+ y: 4,`
	`16`	`+ expected: 2,`
	`17`	`+ },`
	`18`	`+ }`
	`19`	`+ for _, tc := range tests {`
	`20`	`+ output := hammingDistance(tc.x, tc.y)`
	`21`	`+ if output != tc.expected {`
	`22`	`+ t.Fatalf("input: %v %v, output: %v, expected: %v", tc.x, tc.y, output, tc.expected)`
	`23`	`+ }`
	`24`	`+ }`
	`25`	`+}`

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