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translating 'basic matches'

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@ -57,24 +57,21 @@ A expressão regular acima aceita as strings `john_doe`, `jo-hn_doe` e `john12_a
## 1. Combinações Básicas
A regular expression is just a pattern of characters that we use to perform search in a text. For example, the regular expression
`the` means: the letter `t`, followed by the letter `h`, followed by the letter `e`.
Uma expressão regular é apenas um padrão de caracteres que usamos para fazer busca em um texto. Por exemplo, a expressão regular `the` significa: a letra `t`, seguida da letra `h`, seguida da letra `e`.
<pre>
"the" => The fat cat sat on <a href="#learn-regex"><strong>the</strong></a> mat.
</pre>
[Test the regular expression](https://regex101.com/r/dmRygT/1)
[Teste a RegExp](https://regex101.com/r/dmRygT/1)
The regular expression `123` matches the string `123`. The regular expression is matched against an input string by comparing each
character in the regular expression to each character in the input string, one after another. Regular expressions are normally
case-sensitive so the regular expression `The` would not match the string `the`.
A expressão regular `123` corresponde a string `123`. A expressão regular é comparada com uma string de entrada, comparando cada caractere da expressão regular para cada caractere da string de entrada, um após o outro. Expressões regulares são normalmente case-sensitive (sensíveis à maiúsculas), então a expressão regular `The` não vai bater com a string `the`.
<pre>
"The" => <a href="#learn-regex"><strong>The</strong></a> fat cat sat on the mat.
</pre>
[Test the regular expression](https://regex101.com/r/1paXsy/1)
[Teste a RegExp](https://regex101.com/r/1paXsy/1)
## 2. Metacaracteres
@ -107,7 +104,7 @@ letter `r`.
".ar" => The <a href="#learn-regex"><strong>car</strong></a> <a href="#learn-regex"><strong>par</strong></a>ked in the <a href="#learn-regex"><strong>gar</strong></a>age.
</pre>
[Test the regular expression](https://regex101.com/r/xc9GkU/1)
[Teste a RegExp](https://regex101.com/r/xc9GkU/1)
## 2.2 Conjunto de caracteres
@ -119,7 +116,7 @@ expression `[Tt]he` means: an uppercase `T` or lowercase `t`, followed by the le
"[Tt]he" => <a href="#learn-regex"><strong>The</strong></a> car parked in <a href="#learn-regex"><strong>the</strong></a> garage.
</pre>
[Test the regular expression](https://regex101.com/r/2ITLQ4/1)
[Teste a RegExp](https://regex101.com/r/2ITLQ4/1)
A period inside a character set, however, means a literal period. The regular expression `ar[.]` means: a lowercase character `a`, followed by letter `r`, followed by a period `.` character.
@ -127,7 +124,7 @@ A period inside a character set, however, means a literal period. The regular ex
"ar[.]" => A garage is a good place to park a c<a href="#learn-regex"><strong>ar.</strong></a>
</pre>
[Test the regular expression](https://regex101.com/r/wL3xtE/1)
[Teste a RegExp](https://regex101.com/r/wL3xtE/1)
### 2.2.1 Conjunto de caracteres negados
@ -139,7 +136,7 @@ the letter `r`.
"[^c]ar" => The car <a href="#learn-regex"><strong>par</strong></a>ked in the <a href="#learn-regex"><strong>gar</strong></a>age.
</pre>
[Test the regular expression](https://regex101.com/r/nNNlq3/1)
[Teste a RegExp](https://regex101.com/r/nNNlq3/1)
## 2.3 Repetições
@ -156,7 +153,7 @@ character set. For example, the regular expression `[a-z]*` means: any number of
"[a-z]*" => T<a href="#learn-regex"><strong>he</strong></a> <a href="#learn-regex"><strong>car</strong></a> <a href="#learn-regex"><strong>parked</strong></a> <a href="#learn-regex"><strong>in</strong></a> <a href="#learn-regex"><strong>the</strong></a> <a href="#learn-regex"><strong>garage</strong></a> #21.
</pre>
[Test the regular expression](https://regex101.com/r/7m8me5/1)
[Teste a RegExp](https://regex101.com/r/7m8me5/1)
The `*` symbol can be used with the meta character `.` to match any string of characters `.*`. The `*` symbol can be used with the
whitespace character `\s` to match a string of whitespace characters. For example, the expression `\s*cat\s*` means: zero or more
@ -167,7 +164,7 @@ zero or more spaces.
"\s*cat\s*" => The fat<a href="#learn-regex"><strong> cat </strong></a>sat on the <a href="#learn-regex">con<strong>cat</strong>enation</a>.
</pre>
[Test the regular expression](https://regex101.com/r/gGrwuz/1)
[Teste a RegExp](https://regex101.com/r/gGrwuz/1)
### 2.3.2 O Sinal de Adição
@ -178,7 +175,7 @@ letter `c`, followed by at least one character, followed by the lowercase charac
"c.+t" => The fat <a href="#learn-regex"><strong>cat sat on the mat</strong></a>.
</pre>
[Test the regular expression](https://regex101.com/r/Dzf9Aa/1)
[Teste a RegExp](https://regex101.com/r/Dzf9Aa/1)
### 2.3.3 O Ponto de Interrogação
@ -190,13 +187,13 @@ character `h`, followed by the lowercase character `e`.
"[T]he" => <a href="#learn-regex"><strong>The</strong></a> car is parked in the garage.
</pre>
[Test the regular expression](https://regex101.com/r/cIg9zm/1)
[Teste a RegExp](https://regex101.com/r/cIg9zm/1)
<pre>
"[T]?he" => <a href="#learn-regex"><strong>The</strong></a> car is parked in t<a href="#learn-regex"><strong>he</strong></a> garage.
</pre>
[Test the regular expression](https://regex101.com/r/kPpO2x/1)
[Teste a RegExp](https://regex101.com/r/kPpO2x/1)
## 2.4 Chaves
@ -208,7 +205,7 @@ characters in the range of 0 to 9).
"[0-9]{2,3}" => The number was 9.<a href="#learn-regex"><strong>999</strong></a>7 but we rounded it off to <a href="#learn-regex"><strong>10</strong></a>.0.
</pre>
[Test the regular expression](https://regex101.com/r/juM86s/1)
[Teste a RegExp](https://regex101.com/r/juM86s/1)
We can leave out the second number. For example, the regular expression `[0-9]{2,}` means: Match 2 or more digits. If we also remove
the comma the regular expression `[0-9]{3}` means: Match exactly 3 digits.
@ -217,13 +214,13 @@ the comma the regular expression `[0-9]{3}` means: Match exactly 3 digits.
"[0-9]{2,}" => The number was 9.<a href="#learn-regex"><strong>9997</strong></a> but we rounded it off to <a href="#learn-regex"><strong>10</strong></a>.0.
</pre>
[Test the regular expression](https://regex101.com/r/Gdy4w5/1)
[Teste a RegExp](https://regex101.com/r/Gdy4w5/1)
<pre>
"[0-9]{3}" => The number was 9.<a href="#learn-regex"><strong>999</strong></a>7 but we rounded it off to 10.0.
</pre>
[Test the regular expression](https://regex101.com/r/Sivu30/1)
[Teste a RegExp](https://regex101.com/r/Sivu30/1)
## 2.5 Grupo de Caracteres
@ -237,7 +234,7 @@ We can also use the alternation `|` meta character inside character group. For e
"(c|g|p)ar" => The <a href="#learn-regex"><strong>car</strong></a> is <a href="#learn-regex"><strong>par</strong></a>ked in the <a href="#learn-regex"><strong>gar</strong></a>age.
</pre>
[Test the regular expression](https://regex101.com/r/tUxrBG/1)
[Teste a RegExp](https://regex101.com/r/tUxrBG/1)
## 2.6 Alternância
@ -251,7 +248,7 @@ or lowercase character `c`, followed by lowercase character `a`, followed by low
"(T|t)he|car" => <a href="#learn-regex"><strong>The</strong></a> <a href="#learn-regex"><strong>car</strong></a> is parked in <a href="#learn-regex"><strong>the</strong></a> garage.
</pre>
[Test the regular expression](https://regex101.com/r/fBXyX0/1)
[Teste a RegExp](https://regex101.com/r/fBXyX0/1)
## 2.7 Escapando Caracteres Especiais
@ -265,7 +262,7 @@ expression `(f|c|m)at\.?` means: lowercase letter `f`, `c` or `m`, followed by l
"(f|c|m)at\.?" => The <a href="#learn-regex"><strong>fat</strong></a> <a href="#learn-regex"><strong>cat</strong></a> sat on the <a href="#learn-regex"><strong>mat.</strong></a>
</pre>
[Test the regular expression](https://regex101.com/r/DOc5Nu/1)
[Teste a RegExp](https://regex101.com/r/DOc5Nu/1)
## 2.8 Âncoras
@ -286,13 +283,13 @@ followed by lowercase character `h`, followed by lowercase character `e`.
"(T|t)he" => <a href="#learn-regex"><strong>The</strong></a> car is parked in <a href="#learn-regex"><strong>the</strong></a> garage.
</pre>
[Test the regular expression](https://regex101.com/r/5ljjgB/1)
[Teste a RegExp](https://regex101.com/r/5ljjgB/1)
<pre>
"^(T|t)he" => <a href="#learn-regex"><strong>The</strong></a> car is parked in the garage.
</pre>
[Test the regular expression](https://regex101.com/r/jXrKne/1)
[Teste a RegExp](https://regex101.com/r/jXrKne/1)
### 2.8.2 Sinal de Dólar
@ -304,13 +301,13 @@ must be end of the string.
"(at\.)" => The fat c<a href="#learn-regex"><strong>at.</strong></a> s<a href="#learn-regex"><strong>at.</strong></a> on the m<a href="#learn-regex"><strong>at.</strong></a>
</pre>
[Test the regular expression](https://regex101.com/r/y4Au4D/1)
[Teste a RegExp](https://regex101.com/r/y4Au4D/1)
<pre>
"(at\.)$" => The fat cat. sat. on the m<a href="#learn-regex"><strong>at.</strong></a>
</pre>
[Test the regular expression](https://regex101.com/r/t0AkOd/1)
[Teste a RegExp](https://regex101.com/r/t0AkOd/1)
## 3. Forma Abreviada de Conjunto de Caracteres
@ -355,7 +352,7 @@ followed by letter `h`, followed by letter `e`. In parentheses we define positiv
"[T|t]he(?=\sfat)" => <a href="#learn-regex"><strong>The</strong></a> fat cat sat on the mat.
</pre>
[Test the regular expression](https://regex101.com/r/IDDARt/1)
[Teste a RegExp](https://regex101.com/r/IDDARt/1)
### 4.2 Lookahead Negativo
@ -368,7 +365,7 @@ input string that are not followed by the word `fat` precedes by a space charact
"[T|t]he(?!\sfat)" => The fat cat sat on <a href="#learn-regex"><strong>the</strong></a> mat.
</pre>
[Test the regular expression](https://regex101.com/r/V32Npg/1)
[Teste a RegExp](https://regex101.com/r/V32Npg/1)
### 4.3 Lookbehind Positivo
@ -380,7 +377,7 @@ are after the word `The` or `the`.
"(?<=[T|t]he\s)(fat|mat)" => The <a href="#learn-regex"><strong>fat</strong></a> cat sat on the <a href="#learn-regex"><strong>mat</strong></a>.
</pre>
[Test the regular expression](https://regex101.com/r/avH165/1)
[Teste a RegExp](https://regex101.com/r/avH165/1)
### 4.4 Lookbehind Negativo
@ -392,7 +389,7 @@ are not after the word `The` or `the`.
"(?&lt;![T|t]he\s)(cat)" => The cat sat on <a href="#learn-regex"><strong>cat</strong></a>.
</pre>
[Test the regular expression](https://regex101.com/r/8Efx5G/1)
[Teste a RegExp](https://regex101.com/r/8Efx5G/1)
## 5. Flags
@ -416,13 +413,13 @@ the whole input string.
"The" => <a href="#learn-regex"><strong>The</strong></a> fat cat sat on the mat.
</pre>
[Test the regular expression](https://regex101.com/r/dpQyf9/1)
[Teste a RegExp](https://regex101.com/r/dpQyf9/1)
<pre>
"/The/gi" => <a href="#learn-regex"><strong>The</strong></a> fat cat sat on <a href="#learn-regex"><strong>the</strong></a> mat.
</pre>
[Test the regular expression](https://regex101.com/r/ahfiuh/1)
[Teste a RegExp](https://regex101.com/r/ahfiuh/1)
### 5.2 Busca Global
@ -435,13 +432,13 @@ string.
"/.(at)/" => The <a href="#learn-regex"><strong>fat</strong></a> cat sat on the mat.
</pre>
[Test the regular expression](https://regex101.com/r/jnk6gM/1)
[Teste a RegExp](https://regex101.com/r/jnk6gM/1)
<pre>
"/.(at)/g" => The <a href="#learn-regex"><strong>fat</strong></a> <a href="#learn-regex"><strong>cat</strong></a> <a href="#learn-regex"><strong>sat</strong></a> on the <a href="#learn-regex"><strong>mat</strong></a>.
</pre>
[Test the regular expression](https://regex101.com/r/dO1nef/1)
[Teste a RegExp](https://regex101.com/r/dO1nef/1)
### 5.3 Multilinhas
@ -456,7 +453,7 @@ line. And because of `m` flag now regular expression engine matches pattern at t
on the <a href="#learn-regex"><strong>mat.</strong></a>
</pre>
[Test the regular expression](https://regex101.com/r/hoGMkP/1)
[Teste a RegExp](https://regex101.com/r/hoGMkP/1)
<pre>
"/.at(.)?$/gm" => The <a href="#learn-regex"><strong>fat</strong></a>
@ -464,7 +461,7 @@ line. And because of `m` flag now regular expression engine matches pattern at t
on the <a href="#learn-regex"><strong>mat.</strong></a>
</pre>
[Test the regular expression](https://regex101.com/r/E88WE2/1)
[Teste a RegExp](https://regex101.com/r/E88WE2/1)
## Bônus