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Greedy and lazy quantifiers#355

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joaquinelio merged 10 commits intojavascript-tutorial:masterfromcortizg:es.javascript.info.9-10-glq
Aug 30, 2020
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traducción 9-10-glq
cortizgJul 19, 2020
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Update 9-regular-expressions/10-regexp-greedy-and-lazy/article.md
cortizgAug 23, 2020
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Update 9-regular-expressions/10-regexp-greedy-and-lazy/article.md
cortizgAug 23, 2020
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Update 9-regular-expressions/10-regexp-greedy-and-lazy/4-find-html-ta…
cortizgAug 23, 2020
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cortizgAug 23, 2020
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cortizgAug 23, 2020
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cortizgAug 23, 2020
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Update 9-regular-expressions/10-regexp-greedy-and-lazy/article.md
cortizgAug 23, 2020
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Update 9-regular-expressions/10-regexp-greedy-and-lazy/article.md
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@@ -1,6 +1,6 @@

The result is: `match:123 4`.
El resultado es: `match:123 4`.

First the lazy `pattern:\d+?`tries to take as little digits as it can, but it has to reach the space, so it takes `match:123`.
Primero el perezoso `pattern:\d+?`trata de tomar la menor cantidad de dígitos posible, pero tiene que llegar al espacio, por lo que toma `match:123`.

Then the second `\d+?`takes only one digit, because that's enough.
Después el segundo `\d+?`toma solo un dígito, porque es sufuciente.
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#A match for /d+? d+?/
#Una coincidencia para /d+? d+?/

What's the match here?
¿Cual es la coincidencia aquí?

```js
"123 456".match(/\d+? \d+?/g) ); // ?
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We need to find the beginning of the comment`match:<!--`,then everything till the end of `match:-->`.
Necesitamos encontrar el inicio del comentario`match:<!--`,después todo hasta el fin de `match:-->`.

An acceptable variant is `pattern:<!--.*?-->` --the lazy quantifier makes the dot stop right before `match:-->`.We also need to add flag`pattern:s`for the dot to include newlines.
Una variante aceptable es `pattern:<!--.*?-->` --el cuantificador perezoso detiene el punto justo antes de `match:-->`.También necesitamos agregar la bandera`pattern:s`al punto para incluir líneas nuevas.

Otherwise multiline comments won't be found:
De lo contrario, no se encontrarán comentarios multilínea:

```js run
let regexp = /<!--.*?-->/gs;

let str = `... <!--My --comment
test --> .. <!----> ..
let str = `... <!--Mi --comentario
prueba --> .. <!----> ..
`;

alert( str.match(regexp) ); // '<!--My --comment \ntest -->', '<!---->'
alert( str.match(regexp) ); // '<!--Mi --comentario \nprueba -->', '<!---->'
```
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@@ -1,13 +1,13 @@
#Find HTML comments
#Encuentra el comentario HTML

Find all HTML comments in the text:
Encuentra todos los comentarios HTML en el texto:

```js
let regexp = /your regexp/g;

let str = `... <!--My --comment
test --> .. <!----> ..
let str = `... <!--Mi --comentario
prueba --> .. <!----> ..
`;

alert( str.match(regexp) ); // '<!--My --comment \ntest -->', '<!---->'
alert( str.match(regexp) ); // '<!--Mi --comentario \nprueba -->', '<!---->'
```
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@@ -1,10 +1,10 @@

The solution is `pattern:<[^<>]+>`.
La solución es `pattern:<[^<>]+>`.

```js run
let regexp = /<[^<>]+>/g;

let str = '<> <a href="/"> <input type="radio" checked> <b>';
let str = '<> <a href="/"> <input type="radio" checked> <b>';

alert( str.match(regexp) ); // '<a href="/">', '<input type="radio" checked>', '<b>'
alert( str.match(regexp) ); // '<a href="/">', '<input type="radio" checked>', '<b>'
```
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#Find HTML tags
#Encontrar las etiquetas HTML

Create aregularexpression to find all (opening and closing) HTML tags with their attributes.
Crear una expresiónregularpara encontrar todas las etiquetas HTML (de apertura y cierre) con sus atributos.

An example of use:
Un ejemplo de uso:

```js run
let regexp = /your regexp/g;
let regexp = /tu regexp/g;

let str = '<> <a href="/"> <input type="radio" checked> <b>';
let str = '<> <a href="/"> <input type="radio" checked> <b>';

alert( str.match(regexp) ); // '<a href="/">', '<input type="radio" checked>', '<b>'
alert( str.match(regexp) ); // '<a href="/">', '<input type="radio" checked>', '<b>'
```

Here we assume that tag attributes may not contain `<`and `>` (inside squotes too),that simplifies things a bit.
Asumimos que los atributos de etiqueta no deben contener `<`ni `>` (dentro de comillas dobles también),esto simplifica un poco las cosas.
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