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-rw-r--r--it-it/pcre-it.html.markdown13
-rw-r--r--pcre.html.markdown25
-rw-r--r--zh-tw/pcre-tw.html.markdown9
3 files changed, 31 insertions, 16 deletions
diff --git a/it-it/pcre-it.html.markdown b/it-it/pcre-it.html.markdown
index 68233858..704392ef 100644
--- a/it-it/pcre-it.html.markdown
+++ b/it-it/pcre-it.html.markdown
@@ -11,7 +11,7 @@ lang: it-it
Un'espressione regolare (regex o regexp in breve) è una speciale stringa
utilizzata per definire un pattern, ad esempio per cercare una sequenza di
caratteri; ad esempio, `/^[a-z]+:/` può essere usato per estrarre `http:`
-dall'URL `http://github.com/`.
+dall'URL `http://github.com/`.
PCRE (Perl Compatible Regular Expressions) è una libreria per i regex in C.
La sintassi utilizzata per le espressioni è molto simile a quella di Perl, da
@@ -19,7 +19,9 @@ cui il nome. Si tratta di una delle sintassi più diffuse per la scrittura di
regex.
Esistono due tipi di metacaratteri (caratteri con una funzione speciale):
+
* Caratteri riconosciuti ovunque tranne che nelle parentesi quadre
+
```
\ carattere di escape
^ cerca all'inizio della stringa (o della riga, in modalità multiline)
@@ -36,16 +38,17 @@ Esistono due tipi di metacaratteri (caratteri con una funzione speciale):
```
* Caratteri riconosciuti nelle parentesi quadre
+
```
\ carattere di escape
^ nega la classe se è il primo carattere
- indica una serie di caratteri
[ classe caratteri POSIX (se seguita dalla sintassi POSIX)
] termina la classe caratteri
-
-```
+```
+
+PCRE fornisce inoltre delle classi di caratteri predefinite:
-PCRE fornisce inoltre delle classi di caratteri predefinite:
```
\d cifra decimale
\D NON cifra decimale
@@ -62,9 +65,11 @@ PCRE fornisce inoltre delle classi di caratteri predefinite:
## Esempi
Utilizzeremo la seguente stringa per i nostri test:
+
```
66.249.64.13 - - [18/Sep/2004:11:07:48 +1000] "GET /robots.txt HTTP/1.0" 200 468 "-" "Googlebot/2.1"
```
+
Si tratta di una riga di log del web server Apache.
| Regex | Risultato | Commento |
diff --git a/pcre.html.markdown b/pcre.html.markdown
index 3e877a35..9e091721 100644
--- a/pcre.html.markdown
+++ b/pcre.html.markdown
@@ -3,16 +3,18 @@ language: PCRE
filename: pcre.txt
contributors:
- ["Sachin Divekar", "http://github.com/ssd532"]
-
+
---
-A regular expression (regex or regexp for short) is a special text string for describing a search pattern. e.g. to extract domain name from a string we can say `/^[a-z]+:/` and it will match `http:` from `http://github.com/`.
+A regular expression (regex or regexp for short) is a special text string for describing a search pattern. e.g. to extract domain name from a string we can say `/^[a-z]+:/` and it will match `http:` from `http://github.com/`.
PCRE (Perl Compatible Regular Expressions) is a C library implementing regex. It was written in 1997 when Perl was the de-facto choice for complex text processing tasks. The syntax for patterns used in PCRE closely resembles Perl. PCRE syntax is being used in many big projects including PHP, Apache, R to name a few.
There are two different sets of metacharacters:
+
* Those that are recognized anywhere in the pattern except within square brackets
+
```
\ general escape character with several uses
^ assert start of string (or line, in multiline mode)
@@ -32,18 +34,19 @@ There are two different sets of metacharacters:
```
* Those that are recognized within square brackets. Outside square brackets. They are also called as character classes.
-
+
```
-
+
\ general escape character
^ negate the class, but only if the first character
- indicates character range
[ POSIX character class (only if followed by POSIX syntax)
] terminates the character class
-
-```
-PCRE provides some generic character types, also called as character classes.
+```
+
+PCRE provides some generic character types, also called as character classes.
+
```
\d any decimal digit
\D any character that is not a decimal digit
@@ -59,7 +62,13 @@ PCRE provides some generic character types, also called as character classes.
## Examples
-We will test our examples on following string `66.249.64.13 - - [18/Sep/2004:11:07:48 +1000] "GET /robots.txt HTTP/1.0" 200 468 "-" "Googlebot/2.1"`. It is a standard Apache access log.
+We will test our examples on the following string:
+
+```
+66.249.64.13 - - [18/Sep/2004:11:07:48 +1000] "GET /robots.txt HTTP/1.0" 200 468 "-" "Googlebot/2.1"
+```
+
+ It is a standard Apache access log.
| Regex | Result | Comment |
| :---- | :-------------- | :------ |
diff --git a/zh-tw/pcre-tw.html.markdown b/zh-tw/pcre-tw.html.markdown
index c9cdc537..5f681d46 100644
--- a/zh-tw/pcre-tw.html.markdown
+++ b/zh-tw/pcre-tw.html.markdown
@@ -13,7 +13,9 @@ lang: zh-tw
相容Perl正規表達式(Perl Compatible Regular Expressions, PCRE)是一個實作正規表達式的C語言函式庫。此函式庫在1997年被開發出來,在當時面對複雜字串處理時大多會選擇使用Perl。也因為如此,PCRE大多的正規表達式語法都很酷似Perl。PCRE語法被廣泛運用在許多大專案中,包括PHP、Apache、R等。
PCRE中的超字元(metacharacter)主要可以分為以下兩類:
+
* 在中括號外會被辨識的字元
+
```
\ 通用跳脫字元
^ 字串開頭 或 行首
@@ -33,18 +35,17 @@ PCRE中的超字元(metacharacter)主要可以分為以下兩類:
```
* 在中括號內會被辨識的超字元,在中括號外會被視為字元集合使用
-
+
```
-
\ 通用跳脫字元
^ 非字元集合的字,但只會抓到第一個符合的字元
- 字元範圍
[ POSIX字元集合(若後面接POSIX格式)
] 字元集合定義結束
-
-```
+```
PCRE提供了一些通用的字元類型,可被當作字元集合使用
+
```
\d 任何數字字元
\D 任何非數字字元