wehub-resource-sync
46 lines
787 B
Go
46 lines
787 B
Go
package main
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import "strings"
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func cut(input string, window []int) string {
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if len(window) == 0 {
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return input
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}
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if len(window) == 1 && window[0] == 0 {
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return input
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}
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if len(window) == 2 && window[0] == 0 && window[1] == -1 {
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return input
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}
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lines := strings.Split(input, "\n")
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start := 0
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end := len(lines)
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switch len(window) {
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case 1:
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if window[0] > 0 {
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start = window[0]
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} else {
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start = len(lines) + window[0] // add negative = subtract
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}
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case 2:
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start = window[0]
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end = window[1]
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}
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start = clamp(start, 0, len(lines))
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end = clamp(end+1, start, len(lines))
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if start == end && start < len(lines) {
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return lines[start]
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}
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return strings.Join(lines[start:end], "\n")
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}
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func clamp(n, low, high int) int {
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return min(max(n, low), high)
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}
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