I finally found an answer: since commit [85eb73ce][1] there is a `pin` subcommand available. So ignoring a formula on `brew upgrade` is as simple as pinning it via `brew pin &lt;formula&gt;`. To un-pin it, simply invoke `brew unpin &lt;formula&gt;`.

It is worth noting that `brew upgrade &lt;formula&gt;` will still update the formula regardless of whether or not it is pinned.

***Caveat:** This answer is no longer valid for recent versions of Homebrew, since `brew pin` has been removed.*

  [1]: https://github.com/Homebrew/homebrew/commit/85eb73ced7316171a3e5087e601f3c182b8859ed

brew pin is the way to go. It will pin the formula to the current version

`brew pin &lt;formula&gt;`

brew unpin can be used to reset this

`brew unpin &lt;formula&gt;`

To view all *pinned* formulae

`brew list --pinned`

**Note:** `brew upgrade` will not upgrade pinned formulae.


You could upgrade erlang to the latest version but keep using the older working version with the brew commands `versions` and `switch`.

To list available versions use:

    brew versions erlang

To switch between two installed versions (I&#39;ll presume you wanted erlang R14):

    brew switch erlang R14B04

i had a similar &#39;problem&#39;. i installed libfreenect (unstable) directly on my system. and now i dont want homebrew to upgrade it. i solved it by deleting following file:

`/usr/local/Library/Formula/libfreenect.rb`

analogous it would be `/usr/local/Library/Formula/erlang.rb` for you

I was wondering about the differences between Grep and Filter :

Filter : 

&gt; Reduce the set of matched elements to those that match the selector or
&gt; pass the function&#39;s test.

Grep : 

&gt; Finds the elements of an array which satisfy a filter
&gt; function. The original array is not affected.

 **ok.**

so if I do this in GREP :

    var arr = [ 1, 9, 3, 8, 6, 1, 5, 9, 4, 7, 3, 8, 6, 9, 1 ];
     
    myNewArray= jQuery.grep(arr, function(n, i){
      return (n != 5 &amp;&amp; i &gt; 4);
    });



I could do also : 

     var arr = [ 1, 9, 3, 8, 6, 1, 5, 9, 4, 7, 3, 8, 6, 9, 1 ];
        
    myNewArray= $(arr).filter( function(n, i){
      return (n != 5 &amp;&amp; i &gt; 4);
    });



In both situations I still can access to the original array...

so...where is the difference ?


Grep vs Filter in jQuery?

How to fetch the data from one database and insert in to another database table? I can&#39;t to do this. Please help me in transferring data from one to another.

Transfer data from one database to another database

I want to do a `brew upgrade` and tell homebrew do not upgrade the `erlang` formula since the latest one does not work on my system.

Is it possible do do something like `homebrew upgrade --skip erlang`?

Ignore formula on brew upgrade

<p>I want to do a <code>brew upgrade</code> and tell homebrew do not upgrade the <code>erlang</code> formula since the latest one does not work on my system.</p>
<p>Is it possible do do something like <code>homebrew upgrade --skip erlang</code>?</p>


Trying to install ruby 1.9.3, read that I need to install homebrew first. Ran brew doctor, and it&#39;s giving me a bunch of warnings. One of which is:

&gt; Warning: /usr/bin occurs before /usr/local/bin This means that
&gt; system-provided programs will be used instead of those provided by
&gt; Homebrew. The following tools exist at both paths:
&gt; 
&gt;     easy_install
&gt;     easy_install-2.6
&gt; 
&gt; Consider amending your PATH so that /usr/local/bin is ahead of
&gt; /usr/bin in your PATH.

How does one do what it&#39;s asking here?

How to modify PATH for Homebrew?

I&#39;m very much a newbie when it comes to all this so forgive my incompetence.

When I run brew Doctor, I get the following. Can someone help?

&lt;!-- language: lang-bsh --&gt;

    [/usr/local]$ brew doctor

    Error: Setting DYLD_LIBRARY_PATH can break dynamic linking.
    You should probably unset it.
    Error: Some keg-only formula are linked into the Cellar.
    Linking a keg-only formula, such as gettext, into the cellar with
    brew link f will cause other formulae to detect them during the
    ./configure step. This may cause problems when compiling those
    other formulae.

    Binaries provided by keg-only formulae may override system binaries
    with other strange results.

    You may wish to brew unlink these brews:

    libxml2

    Error: Unbrewed dylibs were found in /usr/local/lib.
    If you didn&#39;t put them there on purpose they could cause problems when
    building Homebrew formulae, and may need to be deleted.

    Unexpected dylibs:
    /usr/local/lib/libcharset.1.dylib /usr/local/lib/libfreetype.6.dylib /usr/local/lib/libjpeg.8.dylib /usr/local/lib/liblcms.1.0.19.dylib /usr/local/lib/libMagickCore.4.dylib /usr/local/lib/libMagickWand.4.dylib /usr/local/lib/libpng15.15.dylib /usr/local/lib/libtiff.3.dylib /usr/local/lib/libtiffxx.3.dylib /usr/local/lib/libwmf-0.2.7.1.0.dylib /usr/local/lib/libwmflite-0.2.7.0.1.dylib
    Error: Unbrewed .la files were found in /usr/local/lib.
    If you didn&#39;t put them there on purpose they could cause problems when
    building Homebrew formulae, and may need to be deleted.

    Unexpected .la files:
    /usr/local/lib/libcharset.la /usr/local/lib/libfreetype.la /usr/local/lib/libjpeg.la /usr/local/lib/liblcms.la /usr/local/lib/libMagickCore.la /usr/local/lib/libMagickWand.la /usr/local/lib/libpng15.la /usr/local/lib/libtiff.la /usr/local/lib/libtiffxx.la /usr/local/lib/libwmf.la /usr/local/lib/libwmflite.la
    Error: Unbrewed .pc files were found in /usr/local/lib/pkgconfig.
    If you didn&#39;t put them there on purpose they could cause problems when
    building Homebrew formulae, and may need to be deleted.

    Unexpected .pc files:
    /usr/local/lib/pkgconfig/freetype2.pc /usr/local/lib/pkgconfig/ImageMagick.pc /usr/local/lib/pkgconfig/lcms.pc /usr/local/lib/pkgconfig/libpng15.pc /usr/local/lib/pkgconfig/MagickCore.pc /usr/local/lib/pkgconfig/MagickWand.pc /usr/local/lib/pkgconfig/Wand.pc
    Error: Unbrewed static libraries were found in /usr/local/lib.
    If you didn&#39;t put them there on purpose they could cause problems when
    building Homebrew formulae, and may need to be deleted.

    Unexpected static libraries:
    /usr/local/lib/libcharset.a /usr/local/lib/libfreetype.a /usr/local/lib/libjpeg.a /usr/local/lib/liblcms.a /usr/local/lib/libpng15.a /usr/local/lib/libtiff.a /usr/local/lib/libtiffxx.a /usr/local/lib/libwmf.a /usr/local/lib/libwmflite.a
    Error: You have uncommitted modifications to Homebrew&#39;s core.
    Unless you know what you are doing, you should run:
    cd /usr/local &amp;&amp; git reset --hard
    Error: Some directories in your path end in a slash.
    Directories in your path should not end in a slash. This can break other
    doctor checks. The following directories should be edited:
    /usr/local/git/bin/
    [/usr/local]$

How do I fix brew doctor errors?

I tried to run `brew update` and I get an error about my local changes would be lost if I merged.  I tried committing my local changes (don&#39;t remember making any, but it&#39;s been awhile), and that made things worse.

Here&#39;s the output:

    MBP:Library User$ sudo brew update
    error: The following untracked working tree files would be overwritten by merge:
    	Library/Aliases/fastcgi
    	Library/Aliases/htop
    	Library/Aliases/nodejs
    	Library/Aliases/ocio
    	Library/Aliases/oiio
    	Library/Aliases/pgrep
    	Library/Aliases/pkill
    	Library/Contributions/cmds/brew-beer.rb
    	Library/Contributions/cmds/brew-dirty.rb
    	Library/Contributions/cmds/brew-graph
    	Library/Contributions/cmds/brew-grep
    	Library/Contributions/cmds/brew-leaves.rb
    	Library/Contributions/cmds/brew-linkapps.rb
    	Library/Contributions/cmds/brew-man
    	Library/Contributions/cmds/brew-mirror-check.rb
    	Library/Contributions/cmds/brew-missing.rb
    	Library/Contributions/cmds/brew-pull.rb
    	Library/Contributions/cmds/brew-readall.rb
    	Library/Contributions/cmds/brew-server
    	Library/Contributions/cmds/brew-services.rb
    	Library/Contributions/cmds/brew-switch.rb
    	Library/Contributions/cmds/brew-test-bot.commit.html.erb
    	Library/Contributions/cmds/brew-test-bot.css
    	Library/Contributions/cmds/brew-test-bot.index.html.erb
    	Library/Contributions/cmds/brew-test-bot.rb
    	Library/Contributions/cmds/brew-tests.rb
    	Library/Contributions/cmds/brew-unpack.rb
    	Library/Contributions/cmds/brew-which.rb
    	Library/Contributions/install_homebrew.rb
    	Library/Formula/abcl.rb
    	Library/Formula/abyss.rb
    	Library/Formula/akka.rb
    	Library/Formula/apollo.rb
    	Library/Formula/appledoc.rb
    	Library/Formula/arangodb.rb
    	Library/Formula/autoconf.rb
    	Library/Formula/automake.rb
    	Library/Formula/avidemux.rb
    	Library/Formula/bind.rb
    	Library/Formula/bsdconv.rb
    	Library/Formula/bsdmake.rb
    	Library/Formula/camellia.rb
    	Library/Formula/cbmbasic.rb
    	Library/Formula/cdo.rb
    	Library/Formula/checkstyle.rb
    	Library/Formula/cifer.rb
    	Library/Formula/clhep.rb
    	Library/Formula/collada-dom.rb
    	Library/Formula/crash.rb
    	Library/Formula/crossroads.rb
    	Library/Formula/css-crush.rb
    	Library/Formula/curlftpfs.rb
    	Library/Formula/dart.rb
    	Library/Formula/dasm.rb
    	Library/Formula/dfc.rb
    	Library/Formula/di.rb
    	Library/Formula/dsniff.rb
    	Library/Formula/dupx.rb
    	Library/Formula/dwatch.rb
    	Library/Formula/eprover.rb
    	Library/Formula/ext2fuse.rb
    	Library/Formula/ezlupdate.rb
    	Library/Formula/f3.rb
    	Library/Formula/fastx_toolkit.rb
    	Library/Formula/fceux.rb
    	Library/Formula/findbugs.rb
    	Library/Formula/freerdp.rb
    	Library/Formula/funcoeszz.rb
    	Library/Formula/fwknop.rb
    	Library/Formula/gabedit.rb
    	Library/Formula/gbdfed.rb
    	Library/Formula/gconf.rb
    	Library/Formula/git-encrypt.rb
    	Library/Formula/glm.rb
    	Library/Formula/gmap-gsnap.rb
    	Library/Formula/gnu-arch.rb
    	Library/Formula/gnunet.rb
    	Library/Formula/gobby.rb
    	Library/Formula/gptfdisk.rb
    	Library/Formula/griffon.rb
    	Library/Formula/grok.rb
    	Library/Formula/gtk-chtheme.rb
    	Library/Formula/gtkglextmm.rb
    	Library/Formula/gtmess.rb
    	Library/Formula/hg-flow.rb
    	Library/Formula/hqx.rb
    	Library/Formula/htop-osx.rb
    	Library/Formula/htpdate.rb
    	Library/Formula/imap-uw.rb
    	Library/Formula/iozone.rb
    	Library/Formula/ipbt.rb
    	Library/Formula/ipe.rb
    	Library/Formula/ispc.rb
    	Library/Formula/ispell.rb
    	Library/Formula/jigdo.rb
    	Library/Formula/jing.rb
    	Library/Formula/jless.rb
    	Library/Formula/jpeginfo.rb
    	Library/Formula/konoha.rb
    	Library/Formula/legit.rb
    	Library/Formula/libcouchbase.rb
    	Library/Formula/libcuefile.rb
    	Library/Formula/libextractor.rb
    	Library/Formula/libglademm.rb
    	Library/Formula/libgtextutils.rb
    	Library/Formula/libinfinity.rb
    	Library/Formula/libkate.rb
    	Library/Formula/libqalculate.rb
    	Library/Formula/libqglviewer.rb
    	Library/Formula/libreplaygain.rb
    	Library/Formula/libtool.rb
    	Library/Formula/libvbucket.rb
    	Library/Formula/libvo-aacenc.rb
    	Library/Formula/libxmi.rb
    	Library/Formula/lifelines.rb
    	Library/Formula/makeicns.rb
    	Library/Formula/mathgl.rb
    	Library/Formula/meld.rb
    	Library/Formula/mesalib-glw.rb
    	Library/Formula/minisat.rb
    	Library/Formula/minuit2.rb
    	Library/Formula/mobile-shell.rb
    	Library/Formula/movgrab.rb
    	Library/Formula/mp3cat.rb
    	Library/Formula/mpich2.rb
    	Library/Formula/mrfast.rb
    	Library/Formula/musepack.rb
    	Library/Formula/ndiff.rb
    	Library/Formula/net6.rb
    	Library/Formula/nrpe.rb
    	Library/Formula/nuttcp.rb
    	Library/Formula/oath-toolkit.
    Updating aa07533..3f070ef
    Aborting
    Error: Failed while executing git pull  origin refs/heads/master:refs/remotes/origin/master

brew update: The following untracked working tree files would be overwritten by merge:

I am getting issues with permissions in Homebrew: After I installed Node and tried to install npm using the curl command Homebrew tells you to use, it would fail due to EACCESS errors. I checked the node folder and the permissions were a) unowned by a user (I had to chown it) and b) Had no write permissions (I had to chmod 755 it).

I&#39;ve fixed the issue with NPM, but I had to run its install script as sudo (which is bad!).

I assume I must have installed Homebrew as root or something similar. I am hoping that reinstallation will fix it, but I can&#39;t find a source on how to reinstall Homebrew.

When I rerun the installer in Terminal I get:

    /usr/local/.git already exists!

What is the best/safest way to reinstall Homebrew?

I am trying to install memcached using:

    brew install memcached

This ends in error about homebrew not being able to create a symlink:

    The linking step did not complete successfully
    The formula built, but is not symlinked into /usr/local

Help!

Content Type	Original Author	Original Content on Stackoverflow
Question	pangratz	View Question on Stackoverflow
Solution 1 - Homebrew	pangratz	View Answer on Stackoverflow
Solution 2 - Homebrew	Khurram Raza	View Answer on Stackoverflow
Solution 3 - Homebrew	eagleflo	View Answer on Stackoverflow
Solution 4 - Homebrew	tienbuiDE	View Answer on Stackoverflow

Ignore formula on brew upgrade

Homebrew Problem Overview

Homebrew Solutions

Solution 1 - Homebrew

Solution 2 - Homebrew

Solution 3 - Homebrew

Solution 4 - Homebrew

Transfer data from one database to another database

Grep vs Filter in jQuery?

Attributions