Category talk:Wren-str: Difference between revisions
→Source code: Added more versatile Str.replace and minor edit to Str.exchange method.
(Fixed minor bug in Greek.names property and added Str.splitNoEmpty method.) |
(→Source code: Added more versatile Str.replace and minor edit to Str.exchange method.) |
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Line 368:
if (i == j) return s
var chars = s.toList
chars[i] = chars[j]▼
chars[j] = t▼
return Strs.concat(chars)
}
// Returns 's' with 'from' replaced by 'to' up to 'n' times (all times if n is negative)
// but skipping the first 'skip' matches.
static replace(s, from, to, n, skip) {
if (!(from is String)) Fiber.abort("'from 'must be a string.")
if (!(to is String)) Fiber.abort("'to' must be a string.")
if (!(n is Num && n.isInteger)) Fiber.abort("'n' must be an integer.")
if (!(skip is Num && skip.isInteger && skip >= 0)) {
Fiber.abort("'skip' must be a non-negative integer.")
}
if (!(s is String)) s = "%(s)"
if (n < 0) {
if (skip == 0) return s.replace(from, to)
n = Num.maxSafeInteger
}
if (n == 0 || skip >= n) return s
var split = s.split(from)
for (i in 0...split.count-1) {
count = count + 1
res = res + split[i] + ((count <= skip || count > n) ? from : to)
}
return res + split[-1]
}
// Convenience version of 'replace' where 'skip' is always zero.
static replace(s, from, to, n) { replace(s, from, to, n, 0) }
// Returns 's' repeated 'reps' times.
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