27 lines
608 B
Go
27 lines
608 B
Go
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package pascal
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// Triangle returns pascals triangle up to depth
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func Triangle(depth int) [][]int {
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var ret [][]int
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for currDepth := 0; currDepth < depth; currDepth++ {
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var newRow, prevRow []int
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// Each row is currDepth+1 long
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rowLength := currDepth + 1
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// Rows start with a 1
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newRow = append(newRow, 1)
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if currDepth > 0 {
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prevRow = ret[currDepth-1]
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}
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for i := 1; i < rowLength; i++ {
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if i == rowLength-1 {
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// Rows end with a 1 also
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newRow = append(newRow, 1)
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break
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}
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newRow = append(newRow, prevRow[i-1]+prevRow[i])
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}
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ret = append(ret, newRow)
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}
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return ret
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}
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