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all_test.go
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all_test.go
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package rgen
import (
"fmt"
"github.com/xavier268/rgen/dedup"
)
func ExampleAll() {
pattern := "a?(b|c)*"
maxlen := 4
fmt.Println("Pattern:", pattern, "Max length: up to", maxlen, "(included)")
// Iterate over all strings generated from pattern up to maxlen length ...
for s := range All(pattern, maxlen) {
fmt.Println(s)
}
// Output:
// Pattern: a?(b|c)* Max length: up to 4 (included)
//
// b
// c
// a
// bb
// cb
// bc
// cc
// ab
// ac
// bbb
// cbb
// bcb
// ccb
// bbc
// cbc
// bcc
// ccc
// abb
// acb
// abc
// acc
// bbbb
// cbbb
// bcbb
// ccbb
// bbcb
// cbcb
// bccb
// cccb
// bbbc
// cbbc
// bcbc
// ccbc
// bbcc
// cbcc
// bccc
// cccc
// abbb
// acbb
// abcb
// accb
// abbc
// acbc
// abcc
// accc
}
func ExampleAllExact() {
pattern := "a?(b|c)*"
exactlen := 4
fmt.Println("Pattern:", pattern, "Exact length:", exactlen)
// Iterate over all strings generated from pattern up to maxlen length ...
for s := range AllExact(pattern, exactlen) {
fmt.Println(s)
}
// Note how the empty string is not generated anay more below ...
// Output:
// Pattern: a?(b|c)* Exact length: 4
// bbbb
// cbbb
// bcbb
// ccbb
// bbcb
// cbcb
// bccb
// cccb
// bbbc
// cbbc
// bcbc
// ccbc
// bbcc
// cbcc
// bccc
// cccc
// abbb
// acbb
// abcb
// accb
// abbc
// acbc
// abcc
// accc
}
func ExampleDedup() {
pattern := "a+b?a+"
len := 4
fmt.Println("Pattern:", pattern, "Exact length:", len)
// Iterate over all strings generated from pattern having exact length ...
// without deduplicating.
fmt.Println("\nWithout Dedup")
for s := range AllExact(pattern, len) {
fmt.Println(s)
}
// deduplicating using the provided map deduper.
fmt.Println("\nWith Dedup")
for s := range dedup.Dedup(AllExact(pattern, len), dedup.NewDedupMap()) {
fmt.Println(s)
}
// Output:
// Pattern: a+b?a+ Exact length: 4
//
// Without Dedup
// aaaa
// aaaa
// aaaa
// abaa
// aaba
//
// With Dedup
// aaaa
// abaa
// aaba
}