Commit 86c8a3f

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openset

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Add: Power of Four

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Lines changed: 4 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -1 +1,5 @@`
`1`	`1`	`package power_of_four`
	`2`	`+`
	`3`	`+func isPowerOfFour(num int) bool {`
	`4`	`+ return num&(num-1) == 0 && num&0x55555555 > 0`
	`5`	`+}`

Lines changed: 42 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -1 +1,43 @@`
`1`	`1`	`package power_of_four`
	`2`	`+`
	`3`	`+import "testing"`
	`4`	`+`
	`5`	`+type caseType struct {`
	`6`	`+ input int`
	`7`	`+ expected bool`
	`8`	`+}`
	`9`	`+`
	`10`	`+func TestIsPowerOfFour(t *testing.T) {`
	`11`	`+ tests := [...]caseType{`
	`12`	`+ {`
	`13`	`+ input: 16,`
	`14`	`+ expected: true,`
	`15`	`+ },`
	`16`	`+ {`
	`17`	`+ input: 5,`
	`18`	`+ expected: false,`
	`19`	`+ },`
	`20`	`+ {`
	`21`	`+ input: 6,`
	`22`	`+ expected: false,`
	`23`	`+ },`
	`24`	`+ {`
	`25`	`+ input: 12,`
	`26`	`+ expected: false,`
	`27`	`+ },`
	`28`	`+ {`
	`29`	`+ input: 0,`
	`30`	`+ expected: false,`
	`31`	`+ },`
	`32`	`+ {`
	`33`	`+ input: 1,`
	`34`	`+ expected: true,`
	`35`	`+ },`
	`36`	`+ }`
	`37`	`+ for _, tc := range tests {`
	`38`	`+ output := isPowerOfFour(tc.input)`
	`39`	`+ if output != tc.expected {`
	`40`	`+ t.Fatalf("input: %v, output: %v, expected: %v", tc.input, output, tc.expected)`
	`41`	`+ }`
	`42`	`+ }`
	`43`	`+}`

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