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Get the date (a day before current time) in Bash
... answered Nov 10 '09 at 10:17
ghostdog74ghostdog74
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Error when trying vagrant up
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If you're using OS X and used the standard install, Delete vagrant's old curl and it should now work
sudo rm /opt/vagrant/embedded/bin/curl
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How to get the second column from command output?
...rk to get a specific column out of the command output "docker images":
REPOSITORY TAG IMAGE ID CREATED SIZE
ubuntu 16.04 12543ced0f6f 10 months ago 122 MB
ubuntu ...
Getting Python error “from: can't read /var/mail/Bio”
...ntally, from is the name of a command line utility which prints names of those who have sent mail to the given username, so that's why it tries to access the mailboxes).
Another possibility is to add the following line to the top of the script:
#!/usr/bin/env python
This will instruct your shell...
Is volatile expensive?
...volves a load from memory, i.e. the value can not be kept in a register across multiple volatile reads. To ensure that there is an atomic read the value is read from main memory into an MMX register movsd 0x6fb7b2f0(%ebp),%xmm0 making the read operation a single instruction (from the previous exam...
Eclipse comment/uncomment shortcut?
... + / after selecting the lines you want to comment in java editor.
On Mac/OS X you can use ⌘ + / to comment out single lines or selected blocks.
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MySQL Workbench: How to keep the connection alive
Error Code: 2013. Lost connection to MySQL server during query
9 Answers
9
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Ruby: How to get the first character of a string
...ot that you should be using 1.8 anymore anyway!--but when this answer was posted it was still quite common):
puts 'Smith'[0] # prints 83
Of course, if you're not doing it on a regular basis, then defining the method might be overkill, and you could just do it directly:
puts last_name[0...
iPhone/iOS JSON parsing tutorial [closed]
...hing would be nice if it built. Fails for me with 44 errors in Xcode 4 in OS X Lion.
– Sarah Vessels
Jul 20 '12 at 17:04
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Create a folder inside documents folder in iOS apps
...the application's Documents Directory
http://developer.apple.com/library/ios/documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/StandardBehaviors/StandardBehaviors.html#//apple_ref/doc/uid/TP40007072-CH4-SW6
Because the
NSSearchPathForDirectoriesInDomains
function was designed origina...