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No content updates, bump version, addresses #340
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mine-cetinkaya-rundel committed May 29, 2024
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5 changes: 3 additions & 2 deletions _freeze/html/strings/execute-results/html.json
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152 changes: 76 additions & 76 deletions html/strings.qmd
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Expand Up @@ -442,26 +442,26 @@ see <- function(rx) str_view("abc ABC 123\t.!?\\(){}\n", rx)

`alt <- function(rx) str_view("abcde", rx)`

+-------------+--------------+-----------------+--------------------------------------+
| regexp | matches | example | example output\ |
| | | | (highlighted characters are in \<\>) |
+=============+==============+=================+======================================+
| `ab|d` | or | `alt("ab|d")` | ``` |
| | | | <ab>c<d>e |
| | | | ``` |
+-------------+--------------+-----------------+--------------------------------------+
| `[abe]` | one of | `alt("[abe]"` | ``` |
| | | | <a><b>cd<e> |
| | | | ``` |
+-------------+--------------+-----------------+--------------------------------------+
| `[^abe]` | anything but | `alt("[^abe]")` | ``` |
| | | | ab<c><d>e |
| | | | ``` |
+-------------+--------------+-----------------+--------------------------------------+
| `[a-c]` | range | `alt("[a-c]")` | ``` |
| | | | <a><b><c>de |
| | | | ``` |
+-------------+--------------+-----------------+--------------------------------------+
+----------+--------------+-----------------+--------------------------------------+
| regexp | matches | example | example output\ |
| | | | (highlighted characters are in \<\>) |
+==========+==============+=================+======================================+
| `ab|d` | or | `alt("ab|d")` | ``` |
| | | | <ab>c<d>e |
| | | | ``` |
+----------+--------------+-----------------+--------------------------------------+
| `[abe]` | one of | `alt("[abe]"` | ``` |
| | | | <a><b>cd<e> |
| | | | ``` |
+----------+--------------+-----------------+--------------------------------------+
| `[^abe]` | anything but | `alt("[^abe]")` | ``` |
| | | | ab<c><d>e |
| | | | ``` |
+----------+--------------+-----------------+--------------------------------------+
| `[a-c]` | range | `alt("[a-c]")` | ``` |
| | | | <a><b><c>de |
| | | | ``` |
+----------+--------------+-----------------+--------------------------------------+

: Alternates

Expand All @@ -484,61 +484,61 @@ see <- function(rx) str_view("abc ABC 123\t.!?\\(){}\n", rx)

`look <- function(rx) str_view("bacad", rx)`

+-------------+-----------------+-------------------+--------------------------------------+
| regexp | matches | example | example output\ |
| | | | (highlighted characters are in \<\>) |
+=============+=================+===================+======================================+
| `a(?=c)` | followed by | `look("a(?=c)")` | ``` |
| | | | b<a>cad |
| | | | ``` |
+-------------+-----------------+-------------------+--------------------------------------+
| `a(?!c)` | not followed by | `look("a(?!c)")` | ``` |
| | | | bac<a>d |
| | | | ``` |
+-------------+-----------------+-------------------+--------------------------------------+
| `(?<=b)a` | preceded by | `look("(?<=b)a")` | ``` |
| | | | b<a>cad |
| | | | ``` |
+-------------+-----------------+-------------------+--------------------------------------+
| `(?<!b)a` | not preceded by | `look("(?<!b)a")` | ``` |
| | | | bac<a>d |
| | | | ``` |
+-------------+-----------------+-------------------+--------------------------------------+
+-----------+-----------------+-------------------+--------------------------------------+
| regexp | matches | example | example output\ |
| | | | (highlighted characters are in \<\>) |
+===========+=================+===================+======================================+
| `a(?=c)` | followed by | `look("a(?=c)")` | ``` |
| | | | b<a>cad |
| | | | ``` |
+-----------+-----------------+-------------------+--------------------------------------+
| `a(?!c)` | not followed by | `look("a(?!c)")` | ``` |
| | | | bac<a>d |
| | | | ``` |
+-----------+-----------------+-------------------+--------------------------------------+
| `(?<=b)a` | preceded by | `look("(?<=b)a")` | ``` |
| | | | b<a>cad |
| | | | ``` |
+-----------+-----------------+-------------------+--------------------------------------+
| `(?<!b)a` | not preceded by | `look("(?<!b)a")` | ``` |
| | | | bac<a>d |
| | | | ``` |
+-----------+-----------------+-------------------+--------------------------------------+

: Look arounds

### Quantifiers

`quant <- function(rx) str_view(".a.aa.aaa", rx)`

+-------------+---------------------+-------------------+--------------------------------------+
| regexp | matches | example | example output\ |
| | | | (highlighted characters are in \<\>) |
+=============+=====================+===================+======================================+
| `a?` | zero or one | `quant("a?")` | ``` |
| | | | <>.<a><>.<a><a><>.<a><a><a><> |
| | | | ``` |
+-------------+---------------------+-------------------+--------------------------------------+
| `a*` | zero or more | `quant("a*")` | ``` |
| | | | <>.<a><>.<aa><>.<aaa><> |
| | | | ``` |
+-------------+---------------------+-------------------+--------------------------------------+
| `a+` | one or more | `quant("a+")` | ``` |
| | | | .<a>.<aa>.<aaa> |
| | | | ``` |
+-------------+---------------------+-------------------+--------------------------------------+
| `a{n}` | exactly `n` | `quant("a{2}")` | ``` |
| | | | .a.<aa>.<aa>a |
| | | | ``` |
+-------------+---------------------+-------------------+--------------------------------------+
| `a{n, }` | `n` or more | `quant("a{2,}")` | ``` |
| | | | .a.<aa>.<aaa> |
| | | | ``` |
+-------------+---------------------+-------------------+--------------------------------------+
| `a{n, m}` | between `n` and `m` | `quant("a{2,4}")` | ``` |
| | | | .a.<aa>.<aaa> |
| | | | ``` |
+-------------+---------------------+-------------------+--------------------------------------+
+-----------+---------------------+-------------------+--------------------------------------+
| regexp | matches | example | example output\ |
| | | | (highlighted characters are in \<\>) |
+===========+=====================+===================+======================================+
| `a?` | zero or one | `quant("a?")` | ``` |
| | | | <>.<a><>.<a><a><>.<a><a><a><> |
| | | | ``` |
+-----------+---------------------+-------------------+--------------------------------------+
| `a*` | zero or more | `quant("a*")` | ``` |
| | | | <>.<a><>.<aa><>.<aaa><> |
| | | | ``` |
+-----------+---------------------+-------------------+--------------------------------------+
| `a+` | one or more | `quant("a+")` | ``` |
| | | | .<a>.<aa>.<aaa> |
| | | | ``` |
+-----------+---------------------+-------------------+--------------------------------------+
| `a{n}` | exactly `n` | `quant("a{2}")` | ``` |
| | | | .a.<aa>.<aa>a |
| | | | ``` |
+-----------+---------------------+-------------------+--------------------------------------+
| `a{n, }` | `n` or more | `quant("a{2,}")` | ``` |
| | | | .a.<aa>.<aaa> |
| | | | ``` |
+-----------+---------------------+-------------------+--------------------------------------+
| `a{n, m}` | between `n` and `m` | `quant("a{2,4}")` | ``` |
| | | | .a.<aa>.<aaa> |
| | | | ``` |
+-----------+---------------------+-------------------+--------------------------------------+

: Quantifiers

Expand All @@ -548,14 +548,14 @@ see <- function(rx) str_view("abc ABC 123\t.!?\\(){}\n", rx)

Use parentheses to set precedent (order of evaluation) and create groups

+-------------+-----------------+------------------+--------------------------------------+
| regexp | matches | example | example output\ |
| | | | (highlighted characters are in \<\>) |
+=============+=================+==================+======================================+
| `(ab|d)e` | sets precedence | `alt("(ab|d)e")` | ``` |
| | | | abc<de> |
| | | | ``` |
+-------------+-----------------+------------------+--------------------------------------+
+-----------+-----------------+------------------+--------------------------------------+
| regexp | matches | example | example output\ |
| | | | (highlighted characters are in \<\>) |
+===========+=================+==================+======================================+
| `(ab|d)e` | sets precedence | `alt("(ab|d)e")` | ``` |
| | | | abc<de> |
| | | | ``` |
+-----------+-----------------+------------------+--------------------------------------+

: Groups

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