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Backwards migration with Django South

...e number of the migration just before the one you want to roll back. Your app should have a migrations directory, with files in it named like 0000_initial.py 0001_added_some_fields.py 0002_added_some_more_fields.py 0003_deleted_some_stuff.py Normally, when you run ./manage.py migrate your_app, S...
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Why do 64-bit DLLs go to System32 and 32-bit DLLs to SysWoW64 on 64-bit Windows?

... I believe the intent was to rename System32, but so many applications hard-coded for that path, that it wasn't feasible to remove it. SysWoW64 wasn't intended for the dlls of 64-bit systems, it's actually something like "Windows on Windows64", meaning the bits you need to run 32b...
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Using ZXing to create an Android barcode scanning app [duplicate]

I've been searching for how to add a barcode scanner to my app. Are there any examples or how can I do this easily? 7 Answe...
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How to spread django unit tests over multiple files?

...eep the folder clean - this is possible, but you must run ./manage.py test app.tests and all relative imports need to go up a level (from .models becomes from ..models). – Scott Stevens Feb 24 '17 at 13:36 ...
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How to close Android application?

I want to close my application, so that it no longer runs in the background. 22 Answers ...
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In-App Billing test: android.test.purchased already owned

I am currently testing In-App Billing for a future app, and after I successfully "bought" the test item "android.test.purchased" the first time, I now receive the response code 7 every time I try to buy it again, which means that I already own this item. ...
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Enabling HTTPS on express.js

...key: privateKey, cert: certificate}; var express = require('express'); var app = express(); // your express configuration here var httpServer = http.createServer(app); var httpsServer = https.createServer(credentials, app); httpServer.listen(8080); httpsServer.listen(8443); In that way you prov...
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How to copy directories in OS X 10.7.3?

...s under the sourcedir being copied (instead of sourcedir as well), that's happening because you kept the trailing slash for sourcedir: cp -R <sourcedir>/ <destdir> The above only copies the files and their directories inside of sourcedir. Typically, you want to include the directory y...
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What is the difference between min SDK version/target SDK version vs. compile SDK version?

... The min sdk version is the earliest release of the Android SDK that your application can run on. Usually this is because of a problem with the earlier APIs, lacking functionality, or some other behavioural issue. The target sdk version is the version your application was targeted to run on. Ideal...
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Does the APNS device token ever change, once created?

... From [Apple Documentation ApplePushService]2 The form of this phase of token trust ensures that only APNs generates the token which it will later honor, and it can assure itself that a token handed to it by a device is the ...