Blog

The Error $ brew /usr/local/bin/brew: /usr/local/Library/brew.rb: /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby: bad interpreter: No such file or directory /usr/local/bin/brew: line 21: /usr/local/Library/brew.rb: Undefined error: 0 $ brew doctor /usr/local/bin/brew: /usr/local/Library/brew.rb: /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby: bad interpreter: No such file or directory /usr/local/bin/brew: line 21: /usr/local/Library/brew.rb: Undefined error: 0 The Fix Make homebrew think /System/Library/Frameworks/Ruby.framework/Versions/1.8 still exists until you successfully update: cd /System/Library/Frameworks/Ruby.framework/Versions sudo ln -s Current 1.8 brew update sudo rm 1.8

If you’re getting errors like: Building native extensions. This could take a while... ERROR: Error installing pg: ERROR: Failed to build gem native extension. /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby extconf.rb checking for pg_config... yes Using config values from /usr/local/bin/pg_config checking for libpq-fe.h... yes checking for libpq/libpq-fs.h... yes checking for pg_config_manual.h... yes checking for PQconnectdb() in -lpq... no checking for PQconnectdb() in -llibpq... no checking for PQconnectdb() in -lms/libpq... no Can't find the PostgreSQL client library (libpq) *** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options. Provided configuration options: --with-opt-dir --without-opt-dir --with-opt-include --without-opt-include=${opt-dir}/include --with-opt-lib --without-opt-lib=${opt-dir}/lib --with-make-prog --without-make-prog --srcdir=. --curdir --ruby=/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby --with-pg --without-pg --with-pg-config --without-pg-config --with-pg_config --without-pg_config --with-pg-dir --without-pg-dir --with-pg-include --without-pg-include=${pg-dir}/include --with-pg-lib --without-pg-lib=${pg-dir}/ --with-pqlib --without-pqlib --with-libpqlib --without-libpqlib --with-ms/libpqlib --without-ms/libpqlib Gem files will remain installed in /Library/Ruby/Gems/2.0.0/gems/pg-0.17.1 for inspection. Results logged to /Library/Ruby/Gems/2.0.0/gems/pg-0.17.1/ext/gem_make.out Try: ...

Python’s get_tld works very well but is slow if you’re looking up a batch of domain names. Here’s a faster version that falls back on get_tld: from tld import get_tld import re def quick_tld(url): tld_prog = re.compile(r'(?P<tld>[^./]+\.(com|net|org|co\.uk))($|/)') ip_prog = re.compile(r'\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\b') try: tld_match = tld_prog.search(url) if tld_match: return tld_match.group('tld') elif ip_prog.match(article.url): return None else: return get_tld(url) except Exception as e: pass return None

The octet_length function returns the length in bytes size of a bytea field. From the docs: “Number of bytes in binary string”. SELECT octet_length(the_data_field) FROM table_name; # byte size More binary string functions

Common issues caused by bonjour with Teleport: Teleport not connecting Teleport not showing the accept prompt Teleport only able to connect in one direction and not the other Teleport can’t reconnect Making sure Bonjour is working Messages.app > Preferences > Accounts > Bonjour > Enable Bonjour instant messaging (on both computers) Locate your other computer in the buddy list (⌘1) and send a message between computers. Disable Teleport on both computers Restart both computers (sorry) Enable Teleport on both computers and hopefully connect

If you need read only access to a google docs spreadsheet it’s much faster and easier to use an exported version. Just go to File > Download As > Web Page and it’ll open a new window with the fully loaded spreadsheet. Here’s a public spreadsheet if you want to try it out.

I recently built a 3rd party Facebook app for iOS that makes your Facebook feed look like your twitter feed Check it our for free in the app store.

At Starbucks or McDonalds, on airplanes, at libraries or anywhere else they have free wifi you get popups asking you to accept terms and conditions and click a [Connect Now] button. If you ever have problems getting these screens to display it’s almost certainly because you’re using non-default DNS servers. The solution for me was to go to System Preferences > Network and create a new Location called “Default DNS”.

For most bottleneck debugging Chrome Inspector’s profiles view in invaluable until a bottleneck is identified and then it becomes a bit cumbersome. I like to have a quicker overview of the piece i’m working on optimizing. I use this small and easy timer snippet. var timer = { start: function() { timer.t = new Date().getTime(); }, log: function(str) { str = str ? str : 'Execution time: '; console.log(str + ((new Date().getTime()) - timer.t)); } }; //Example (function() { //... timer.start(); //... timer.log('first landmark passed: '); //... timer.log('second landmark passed: '); //... })();

I’m not sure what this will mean for sales but really cool either way. Check it out in the app store