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Altering a column: null to not null
...semantics of NULL can have a few meanings. One of the common meaning is UNKNOWN. Take SCORE as an example. A null SCORE and a ZERO SCORE is a world of difference! Before you did the above recommendations. Make sure you application does not take null in its business logic.
– Tec...
How do I display the current value of an Android Preference in the Preference summary?
...f another loop in onCreate(). Change in behavior: nested PreferenceScreens now also ge handled recursively.
– Lekensteyn
Jun 3 '14 at 12:31
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How to handle command-line arguments in PowerShell
...t like this:
if ($force) {
//deletes a file or does something "bad"
}
Now, when calling the script you'd set the switch/flag parameter like this:
.\yourscript.ps1 -server "http://otherserver" -force
If you explicitly want to state that the flag is not set, there is a special syntax for that
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How can I use grep to find a word inside a folder?
...ve done a search for finding a word inside a folder. Similarly, I want to know if a specific word occurs inside a directory containing many sub-directories and files. My searches for grep syntax shows I must specify the filename, i.e. grep string filename .
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Installing Python packages from local file system folder to virtualenv with pip
...default answer. No need to make pip hunt around with --find-links if you know exactly where your package is on the local machine.
– Robert
Feb 10 at 19:33
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Can I squash commits in Mercurial?
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See the comments. Histedit is now built-in, you just need to enable it (because no default commands will modify history)
– Ry4an Brase
Sep 28 '15 at 15:12
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How do I get the directory that a program is running from?
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I know it is very late at the day to throw an answer at this one but I found that none of the answers were as useful to me as my own solution. A very simple way to get the path from your CWD to your bin folder is like this:
int...
ZSH iterm2 increase number of lines history
...rollback lines value take effect immediately so check Unlimited scrollback now if you don't want to delete your current buffer(s)
change the value of the Scrollback Lines to whatever you'd like
Uncheck the Unlimited scrollback option if you'd like to use your Scrollback lines value
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Error to install Nokogiri on OSX 10.9 Maverick?
... I ran xcode-select --install before the brew install and all works now.
– Quickredfox
Nov 20 '13 at 0:10
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Is there a /dev/null on Windows?
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2 of the links here are now broken. :(
– Michael Foukarakis
Jan 1 at 8:12
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