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<title>Quick intro to custom Vim Mappings - VARSTACK</title>
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                    <h3>Quick intro to custom Vim Mappings</h3>
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                        <p>One of the best things about vim is its ability to create
custom mappings for <em>almost</em> any key in all modes.</p>

<p>Suppose you want Ctrl+S to save your document while you are
in insert mode, because pressing</p>

<pre><code>&lt;Esc&gt;:w&lt;Enter&gt;i
</code></pre>

<p>to switch to normal mode, save the file, and return back
to insert mode is a bit too much. According to vim philosophy,
it actually <strong>IS</strong> too much, and thus you can map Ctrl+S to
those keys just as easily.</p>

<p>For this, add the following to your vimrc</p>

<pre><code>inoremap &lt;C-S&gt; &lt;Esc&gt;:w&lt;Enter&gt;i
</code></pre>

<h4>EXPLANATION:</h4>

<p>The command has separate parts but follows the format</p>

<pre><code>&lt;cmd&gt; &lt;lhs&gt; &lt;rhs&gt;
</code></pre>

<p>The command maps lhs to rhs in the mode specified by cmd.
<code>&lt;cmd&gt;</code> can be further broken down in the following format:</p>

<p><code>&lt;mode&gt;[nore]map</code></p>

<p>where the following modes are common (All
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modes can be viewed
<a href="http://vimdoc.sourceforge.net/htmldoc/map.html#map-modes">here</a>
or using <code>:help map-modes</code>)</p>
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<pre><code>(none): normal, visual, operator-pending mode
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i: insert mode
v: visual mode
n: normal mode
</code></pre>

<p><code>nore</code> is used for no-remapping, i.e. the default functions
of <code>rhs</code> and not their aliases will be used. When skipped,
The <code>rhs</code> will be further resolved if a remapping is found.
Vim, even has a max resolve-depth in case of an infinite loop.</p>

<p>For <code>lhs</code> and <code>rhs</code> the keys are named as follows:</p>

<pre><code>&lt;C-a&gt; : Ctrl + a
&lt;S-a&gt; : Shift + a
&lt;A-a&gt; : Alt + a
&lt;C-S-a&gt; : Ctrl + Shift + a
&lt;Enter&gt;
&lt;BS&gt; : Backspace
etc..
</code></pre>

<p>The whole list can be viewed
<a href="http://vimdoc.sourceforge.net/htmldoc/intro.html#key-notation">here</a>
or using the <code>:help key-notation</code> command inside vim.</p>

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