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How do I launch the Android emulator from the command line?

...pment you just use the same Ant script you used to build the project, just select install target. However, you can install the application manually using command adb install <path-to-your-APK>. Now switch to emulator and launch your application like on any normal device, through the launcher. ...
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Filtering for empty or NULL names in a queryset

...null, not-empty alias field. The generated SQL would look something like: SELECT * FROM Name WHERE alias IS NOT NULL AND alias != "" You can also pass multiple arguments to a single call to exclude, which would ensure that only objects that meet every condition get excluded: Name.objects.exclude...
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'npm' is not recognized as internal or external command, operable program or batch file

...ttings-->Control Panel-->Performance and Maintenance-->System). 2.Select the Advanced tab. 3.Click on the Environment Variables button. 4.Click New button under the "User variables" 5.add "Path" and ";C:\Program Files\nodejs\" – Wen Aug 28 '14 at 4:49 ...
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Merge multiple lines (two blocks) in Vim

... You can certainly do all this with a single copy/paste (using block-mode selection), but I'm guessing that's not what you want. If you want to do this with just Ex commands :5,8del | let l=split(@") | 1,4s/$/\=remove(l,0)/ will transform work it make it do it makes us harder better faster...
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Visual Studio debugging/loading very slow

...Options -> Debugging -> Symbols Click on the "..." button and create/select a new folder somewhere on your local computer to store cached symbols. I named mine "Symbol caching" and put it in Documents -> Visual Studio 2012. Click on "Load all symbols" and wait for the symbols to be download...
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Liquibase lock - reasons?

...ONTINUE"> <sqlCheck expectedResult="0"> select count(*) from user_sequences where sequence_name = 'SEQUENCE_NAME_SEQ'; </sqlCheck> </preConditions> <createSequence sequenceName="SEQUENCE_NAME_SEQ"/> </changeSet> Lockd...
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Is there a rule-of-thumb for how to divide a dataset into training and validation sets?

...o training and validation (again, 80/20 is a fair split). Subsample random selections of your training data, train the classifier with this, and record the performance on the validation set Try a series of runs with different amounts of training data: randomly sample 20% of it, say, 10 times and obs...
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MySQL > Table doesn't exist. But it does (or it should)

...e table name I'm using is off. So table is called 'db' but I used 'DB' in select statement. Make sure the case is the same. share | improve this answer | follow ...
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What is the Windows equivalent of the diff command?

...nd line. You can set the PATH variable by right clicking on Computer and selecting Properties. Then you can click on Advanced System Settings on the left side of the screen. In the pop up, click Environment Variables and then either add or update the PATH variable in your user variables with Git\b...
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Windows Explorer “Command Prompt Here” [closed]

... the command window. Edit: In case you are in a folder and you already selected some of its contents (file/folder) this wont work. In that case Click on the empty area inside the folder to deselect any previously selected files and repeat. Edit2: Another way you can open terminal in current di...