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    <p>I think the vim documentation should've explained the meaning behind the naming of these commands. Just telling you what they do doesn't help you remember the names.</p> <p><code>map</code> is the "root" of all recursive mapping commands. The root form applies to "normal", "visual+select", and "operator-pending" modes. (I'm using the term "root" as in <a href="https://simple.wikipedia.org/wiki/Root_(linguistics)" rel="noreferrer">linguistics</a>.)</p> <p><code>noremap</code> is the "root" of all non-recursive mapping commands. The root form applies to the same modes as <code>map</code>. (Think of the <code>nore</code> prefix to mean "non-recursive".)</p> <p>(Note that there are also the <code>!</code> modes like <code>map!</code> that apply to insert &amp; command-line.)</p> <p>See below for what "recursive" means in this context.</p> <p>Prepending a mode letter like <code>n</code> modify the modes the mapping works in. It can choose a subset of the list of applicable modes (e.g. only "visual"), or choose other modes that <code>map</code> wouldn't apply to (e.g. "insert").</p> <p>Use <code>help map-modes</code> will show you a few tables that explain how to control which modes the mapping applies to.</p> <p>Mode letters:</p> <ul> <li><code>n</code>: normal only</li> <li><code>v</code>: visual and select</li> <li><code>o</code>: operator-pending</li> <li><code>x</code>: visual only</li> <li><code>s</code>: select only</li> <li><code>i</code>: insert</li> <li><code>c</code>: command-line</li> <li><code>l</code>: insert, command-line, regexp-search (and others. Collectively called "Lang-Arg" pseudo-mode)</li> </ul> <p>"<strong>Recursive</strong>" means that the mapping is expanded to a result, then the result is expanded to another result, and so on.</p> <p>The expansion stops when one of these is true:</p> <ol> <li>the result is no longer mapped to anything else.</li> <li>a non-recursive mapping has been applied (i.e. the "noremap" [or one of its ilk] is the final expansion).</li> </ol> <p>At that point, vim's default "meaning" of the final result is applied/executed.</p> <p>"<strong>Non-recursive</strong>" means the mapping is only expanded once, and that result is applied/executed.</p> <p>Example:</p> <pre><code> nmap K H nnoremap H G nnoremap G gg </code></pre> <p>The above causes <code>K</code> to expand to <code>H</code>, then <code>H</code> to expand to <code>G</code> and stop. It stops because of the <code>nnoremap</code>, which expands and stops immediately. The meaning of <code>G</code> will be executed (i.e. "jump to last line"). At most one non-recursive mapping will ever be applied in an expansion chain (it would be the last expansion to happen).</p> <p>The mapping of <code>G</code> to <code>gg</code> only applies if you press <code>G</code>, but not if you press <code>K</code>. This mapping doesn't affect pressing <code>K</code> regardless of whether <code>G</code> was mapped recursively or not, since it's line 2 that causes the expansion of <code>K</code> to stop, so line 3 wouldn't be used.</p>
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