47 lines
1.3 KiB
Plaintext
47 lines
1.3 KiB
Plaintext
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// StringExtBox: small helpers that make scripts concise
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static box StringExtBox {
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trim(s) {
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// naive: trim spaces and newlines at both ends
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local i = 0
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local j = s.length()
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loop (i < j) {
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local ch = s.substring(i, i+1)
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if ch == " " || ch == "\n" || ch == "\r" || ch == "\t" { i = i + 1 } else { break }
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}
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loop (j > i) {
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local ch2 = s.substring(j-1, j)
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if ch2 == " " || ch2 == "\n" || ch2 == "\r" || ch2 == "\t" { j = j - 1 } else { break }
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}
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return s.substring(i, j)
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}
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startsWith(s, pref) {
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return s.substring(0, pref.length()) == pref
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}
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endsWith(s, suf) {
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local n = s.length()
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local m = suf.length()
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if m > n { return false }
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return s.substring(n-m, n) == suf
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}
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replace(s, old, neu) {
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// naive single replacement (first occurrence)
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local i = s.indexOf(old)
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if i < 0 { return s }
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return s.substring(0, i) + neu + s.substring(i + old.length(), s.length())
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}
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split(s, delim) {
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// minimal split (no regex). returns ArrayBox of parts
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local out = []
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local pos = 0
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local dlen = delim.length()
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loop (true) {
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local idx = s.indexOf(delim)
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if idx < 0 { out.push(s) break }
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out.push(s.substring(0, idx))
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s = s.substring(idx + dlen, s.length())
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}
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return out
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}
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}
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