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* Make width narrower
* Convert deps to table
* Strip chapter status
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Hadley Wickham
2022-11-18 11:05:00 -06:00
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oreilly/regexps.html
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<section data-type="chapter" id="chp-regexps">
<h1><span id="sec-regular-expressions" class="quarto-section-identifier d-none d-lg-block"><span class="chapter-title">Regular expressions</span></span></h1><div data-type="note"><div class="callout-body d-flex">
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<p>You are reading the work-in-progress second edition of R for Data Science. This chapter should be readable but is currently undergoing final polishing. You can find the complete first edition at <a href="https://r4ds.had.co.nz" class="uri">https://r4ds.had.co.nz</a>.</p></div>
<h1><span id="sec-regular-expressions" class="quarto-section-identifier d-none d-lg-block"><span class="chapter-title">Regular expressions</span></span></h1><p>::: status callout-note You are reading the work-in-progress second edition of R for Data Science. This chapter should be readable but is currently undergoing final polishing. You can find the complete first edition at <a href="https://r4ds.had.co.nz" class="uri">https://r4ds.had.co.nz</a>. :::</p>
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<h1>
Introduction</h1>
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<p><code>apropos(pattern)</code> searches all objects available from the global environment that match the given pattern. This is useful if you can’t quite remember the name of a function:</p>
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<pre data-type="programlisting" data-code-language="downlit">apropos("replace")
#&gt; [1] "%+replace%" "replace" "replace_na" "setReplaceMethod"
#&gt; [5] "str_replace" "str_replace_all" "str_replace_na" "theme_replace"</pre>
#&gt; [1] "%+replace%" "replace" "replace_na"
#&gt; [4] "setReplaceMethod" "str_replace" "str_replace_all"
#&gt; [7] "str_replace_na" "theme_replace"</pre>
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<p><code>list.files(path, pattern)</code> lists all files in <code>path</code> that match a regular expression <code>pattern</code>. For example, you can find all the R Markdown files in the current directory with:</p>
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