Commit 79d372d

author

Sandy

authored

Merge pull request #104 from openset/develop

Add: add_binary

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Lines changed: 21 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -1 +1,22 @@`
`1`	`1`	`package add_binary`
	`2`	`+`
	`3`	`+func addBinary(a string, b string) string {`
	`4`	`+ i, j := len(a)-1, len(b)-1`
	`5`	`+ var carry byte = '0'`
	`6`	`+ var bs []byte`
	`7`	`+ for i >= 0 \|\| j >= 0 \|\| carry != '0' {`
	`8`	`+ v := carry`
	`9`	`+ if i >= 0 {`
	`10`	`+ v += a[i] - '0'`
	`11`	`+ i--`
	`12`	`+ }`
	`13`	`+ if j >= 0 {`
	`14`	`+ v += b[j] - '0'`
	`15`	`+ j--`
	`16`	`+ }`
	`17`	`+ carry = '0' + (v-'0')/2`
	`18`	`+ v = '0' + (v-'0')%2`
	`19`	`+ bs = append([]byte{v}, bs...)`
	`20`	`+ }`
	`21`	`+ return string(bs)`
	`22`	`+}`

Lines changed: 34 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -1 +1,35 @@`
`1`	`1`	`package add_binary`
	`2`	`+`
	`3`	`+import "testing"`
	`4`	`+`
	`5`	`+type caseType struct {`
	`6`	`+ a string`
	`7`	`+ b string`
	`8`	`+ expected string`
	`9`	`+}`
	`10`	`+`
	`11`	`+func TestAddBinary(t *testing.T) {`
	`12`	`+ tests := [...]caseType{`
	`13`	`+ {`
	`14`	`+ a: "11",`
	`15`	`+ b: "1",`
	`16`	`+ expected: "100",`
	`17`	`+ },`
	`18`	`+ {`
	`19`	`+ a: "1010",`
	`20`	`+ b: "1011",`
	`21`	`+ expected: "10101",`
	`22`	`+ },`
	`23`	`+ {`
	`24`	`+ a: "111",`
	`25`	`+ b: "111",`
	`26`	`+ expected: "1110",`
	`27`	`+ },`
	`28`	`+ }`
	`29`	`+ for _, tc := range tests {`
	`30`	`+ output := addBinary(tc.a, tc.b)`
	`31`	`+ if output != tc.expected {`
	`32`	`+ t.Fatalf("input: %v %v, output: %v, expected: %v", tc.a, tc.b, output, tc.expected)`
	`33`	`+ }`
	`34`	`+ }`
	`35`	`+}`

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