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/*
https://github.com/Zxilly/playground-cj/blob/master/src/examples/functional.cj
*/
package playground
// 用给定的分隔符拆分字符串，支持多分隔符
import std.collection.*
// 常规实现
func split_normal(text: String, sep: String): ArrayList<String> {
let indices = ArrayList<Int64>()
var last = true
for (i in 0..text.size) {
let current = sep.indexOf(text[i]).isSome()
if (last != current) {
indices.add(i)
}
last = current
}
if (!last) {
indices.add(text.size)
}
let result = ArrayList<String>()
for (i in 0..indices.size : 2) {
result.add(text[indices[i]..indices[i + 1]])
}
return result
}
// 函数式编程实现
func split(text: String, sep: String): ArrayList<String> {
let indices = ArrayList<Int64>()
text |> enumerate |>
fold(false) {
state, e =>
let current = sep.indexOf(e[1]).isNone()
if (state != current) {
indices.add(e[0])
}
current
} |> {
valid: Bool => if (valid) {
indices.add(text.size)
}
}
let result = ArrayList<String>()
for (i in 0..indices.size : 2) {
result.add(text[indices[i]..indices[i + 1]])
}
return result
}
main() {
let text = "123, 456 7&89, , 96^3, 567"
let separator = "&^, "
println(split_normal(text, separator))
println(split(text, separator))
}
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