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Commit ad37bc3

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author
openset
committed
Add: Find Smallest Letter Greater Than Target
1 parent 28a25ea commit ad37bc3

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2 files changed

+60
-2
lines changed

2 files changed

+60
-2
lines changed
Lines changed: 10 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1 +1,10 @@
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package find_smallest_letter_greater_than_target
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package problem_744
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func nextGreatestLetter(letters []byte, target byte) byte {
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for _, v := range letters {
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if v > target {
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return v
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}
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}
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return letters[0]
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}
Lines changed: 50 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1 +1,50 @@
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package find_smallest_letter_greater_than_target
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package problem_744
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import "testing"
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type caseType struct {
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input []byte
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target byte
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expected byte
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}
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func TestNextGreatestLetter(t *testing.T) {
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tests := [...]caseType{
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{
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input: []byte{'c', 'f', 'j'},
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target: 'a',
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expected: 'c',
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},
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{
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input: []byte{'c', 'f', 'j'},
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target: 'c',
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expected: 'f',
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},
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{
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input: []byte{'c', 'f', 'j'},
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target: 'd',
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expected: 'f',
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},
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{
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input: []byte{'c', 'f', 'j'},
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target: 'g',
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expected: 'j',
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},
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{
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input: []byte{'c', 'f', 'j'},
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target: 'j',
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expected: 'c',
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},
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{
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input: []byte{'c', 'f', 'j'},
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target: 'k',
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expected: 'c',
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},
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}
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for _, tc := range tests {
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output := nextGreatestLetter(tc.input, tc.target)
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if output != tc.expected {
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t.Fatalf("input: %v, output: %v, expected: %v", tc.input, output, tc.expected)
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}
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}
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}

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