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No content updates, bump version, addresses #340 
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‎_freeze/html/strings/execute-results/html.json

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‎html/images/logo-stringr.png

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‎html/strings.qmd

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Original file line numberDiff line numberDiff line change
@@ -442,26 +442,26 @@ see <- function(rx) str_view("abc ABC 123\t.!?\\(){}\n", rx)
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`alt <- function(rx) str_view("abcde", rx)`
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+-------------+--------------+-----------------+--------------------------------------+
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| regexp | matches | example | example output\ |
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| | | | (highlighted characters are in \<\>) |
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+=============+==============+=================+======================================+
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| `ab|d` | or | `alt("ab|d")` | ``` |
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| | | | <ab>c<d>e |
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| | | | ``` |
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+-------------+--------------+-----------------+--------------------------------------+
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| `[abe]` | one of | `alt("[abe]"` | ``` |
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| | | | <a><b>cd<e> |
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| | | | ``` |
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+-------------+--------------+-----------------+--------------------------------------+
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| `[^abe]` | anything but | `alt("[^abe]")` | ``` |
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| | | | ab<c><d>e |
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| | | | ``` |
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+-------------+--------------+-----------------+--------------------------------------+
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| `[a-c]` | range | `alt("[a-c]")` | ``` |
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| | | | <a><b><c>de |
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| | | | ``` |
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+-------------+--------------+-----------------+--------------------------------------+
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+----------+--------------+-----------------+--------------------------------------+
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| regexp | matches | example | example output\ |
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| | | | (highlighted characters are in \<\>) |
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+==========+==============+=================+======================================+
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| `ab|d` | or | `alt("ab|d")` | ``` |
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| | | | <ab>c<d>e |
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| | | | ``` |
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+----------+--------------+-----------------+--------------------------------------+
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| `[abe]` | one of | `alt("[abe]"` | ``` |
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| | | | <a><b>cd<e> |
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| | | | ``` |
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+----------+--------------+-----------------+--------------------------------------+
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| `[^abe]` | anything but | `alt("[^abe]")` | ``` |
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| | | | ab<c><d>e |
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| | | | ``` |
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+----------+--------------+-----------------+--------------------------------------+
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| `[a-c]` | range | `alt("[a-c]")` | ``` |
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| | | | <a><b><c>de |
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| | | | ``` |
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+----------+--------------+-----------------+--------------------------------------+
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: Alternates
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@@ -484,61 +484,61 @@ see <- function(rx) str_view("abc ABC 123\t.!?\\(){}\n", rx)
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`look <- function(rx) str_view("bacad", rx)`
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+-------------+-----------------+-------------------+--------------------------------------+
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| regexp | matches | example | example output\ |
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| | | | (highlighted characters are in \<\>) |
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+=============+=================+===================+======================================+
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| `a(?=c)` | followed by | `look("a(?=c)")` | ``` |
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| | | | b<a>cad |
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| | | | ``` |
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+-------------+-----------------+-------------------+--------------------------------------+
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| `a(?!c)` | not followed by | `look("a(?!c)")` | ``` |
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| | | | bac<a>d |
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| | | | ``` |
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+-------------+-----------------+-------------------+--------------------------------------+
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| `(?<=b)a` | preceded by | `look("(?<=b)a")` | ``` |
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| | | | b<a>cad |
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| | | | ``` |
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+-------------+-----------------+-------------------+--------------------------------------+
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| `(?<!b)a` | not preceded by | `look("(?<!b)a")` | ``` |
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| | | | bac<a>d |
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| | | | ``` |
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+-------------+-----------------+-------------------+--------------------------------------+
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+-----------+-----------------+-------------------+--------------------------------------+
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| regexp | matches | example | example output\ |
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| | | | (highlighted characters are in \<\>) |
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+===========+=================+===================+======================================+
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| `a(?=c)` | followed by | `look("a(?=c)")` | ``` |
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| | | | b<a>cad |
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| | | | ``` |
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+-----------+-----------------+-------------------+--------------------------------------+
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| `a(?!c)` | not followed by | `look("a(?!c)")` | ``` |
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| | | | bac<a>d |
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| | | | ``` |
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+-----------+-----------------+-------------------+--------------------------------------+
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| `(?<=b)a` | preceded by | `look("(?<=b)a")` | ``` |
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| | | | b<a>cad |
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| | | | ``` |
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+-----------+-----------------+-------------------+--------------------------------------+
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| `(?<!b)a` | not preceded by | `look("(?<!b)a")` | ``` |
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| | | | bac<a>d |
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| | | | ``` |
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+-----------+-----------------+-------------------+--------------------------------------+
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: Look arounds
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### Quantifiers
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`quant <- function(rx) str_view(".a.aa.aaa", rx)`
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+-------------+---------------------+-------------------+--------------------------------------+
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| regexp | matches | example | example output\ |
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| | | | (highlighted characters are in \<\>) |
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+=============+=====================+===================+======================================+
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| `a?` | zero or one | `quant("a?")` | ``` |
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| | | | <>.<a><>.<a><a><>.<a><a><a><> |
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| | | | ``` |
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+-------------+---------------------+-------------------+--------------------------------------+
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| `a*` | zero or more | `quant("a*")` | ``` |
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| | | | <>.<a><>.<aa><>.<aaa><> |
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| | | | ``` |
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+-------------+---------------------+-------------------+--------------------------------------+
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| `a+` | one or more | `quant("a+")` | ``` |
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| | | | .<a>.<aa>.<aaa> |
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| | | | ``` |
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+-------------+---------------------+-------------------+--------------------------------------+
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| `a{n}` | exactly `n` | `quant("a{2}")` | ``` |
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| | | | .a.<aa>.<aa>a |
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| | | | ``` |
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+-------------+---------------------+-------------------+--------------------------------------+
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| `a{n, }` | `n` or more | `quant("a{2,}")` | ``` |
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| | | | .a.<aa>.<aaa> |
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| | | | ``` |
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+-------------+---------------------+-------------------+--------------------------------------+
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| `a{n, m}` | between `n` and `m` | `quant("a{2,4}")` | ``` |
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| | | | .a.<aa>.<aaa> |
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| | | | ``` |
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+-------------+---------------------+-------------------+--------------------------------------+
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+-----------+---------------------+-------------------+--------------------------------------+
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| regexp | matches | example | example output\ |
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| | | | (highlighted characters are in \<\>) |
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+===========+=====================+===================+======================================+
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| `a?` | zero or one | `quant("a?")` | ``` |
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| | | | <>.<a><>.<a><a><>.<a><a><a><> |
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| | | | ``` |
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+-----------+---------------------+-------------------+--------------------------------------+
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| `a*` | zero or more | `quant("a*")` | ``` |
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| | | | <>.<a><>.<aa><>.<aaa><> |
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| | | | ``` |
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+-----------+---------------------+-------------------+--------------------------------------+
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| `a+` | one or more | `quant("a+")` | ``` |
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| | | | .<a>.<aa>.<aaa> |
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| | | | ``` |
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+-----------+---------------------+-------------------+--------------------------------------+
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| `a{n}` | exactly `n` | `quant("a{2}")` | ``` |
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| | | | .a.<aa>.<aa>a |
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| | | | ``` |
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+-----------+---------------------+-------------------+--------------------------------------+
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| `a{n, }` | `n` or more | `quant("a{2,}")` | ``` |
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| | | | .a.<aa>.<aaa> |
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| | | | ``` |
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+-----------+---------------------+-------------------+--------------------------------------+
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| `a{n, m}` | between `n` and `m` | `quant("a{2,4}")` | ``` |
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| | | | .a.<aa>.<aaa> |
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| | | | ``` |
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+-----------+---------------------+-------------------+--------------------------------------+
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: Quantifiers
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@@ -548,14 +548,14 @@ see <- function(rx) str_view("abc ABC 123\t.!?\\(){}\n", rx)
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Use parentheses to set precedent (order of evaluation) and create groups
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+-------------+-----------------+------------------+--------------------------------------+
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| regexp | matches | example | example output\ |
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| | | | (highlighted characters are in \<\>) |
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+=============+=================+==================+======================================+
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| `(ab|d)e` | sets precedence | `alt("(ab|d)e")` | ``` |
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| | | | abc<de> |
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| | | | ``` |
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+-------------+-----------------+------------------+--------------------------------------+
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+-----------+-----------------+------------------+--------------------------------------+
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| regexp | matches | example | example output\ |
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| | | | (highlighted characters are in \<\>) |
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+===========+=================+==================+======================================+
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| `(ab|d)e` | sets precedence | `alt("(ab|d)e")` | ``` |
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| | | | abc<de> |
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| | | | ``` |
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+-----------+-----------------+------------------+--------------------------------------+
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: Groups
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‎keynotes/strings.key

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‎pngs/strings/strings.001.png

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‎strings.pdf

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