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Filtering for empty or NULL names in a queryset
...ame.objects.exclude(Q(alias__isnull=True) | Q(alias__exact=''))
For more info see this page and this page in the Django docs.
As an aside: My SQL examples are just an analogy--the actual generated SQL code will probably look different. You'll get a deeper understanding of how Django queries work ...
Open Facebook page from Android app?
...nager pm, String url) {
Uri uri = Uri.parse(url);
try {
ApplicationInfo applicationInfo = pm.getApplicationInfo("com.facebook.katana", 0);
if (applicationInfo.enabled) {
// http://stackoverflow.com/a/24547437/1048340
uri = Uri.parse("fb://facewebmodal/f?href=" + url);
}
...
How to append to a file in Node?
...graceful-fs'), which hashed out some known problems. See the docs for more info.
– Marko Bonaci
May 27 '15 at 13:16
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Regex to validate password strength
...ry easy to open yourself to catastrophic backtracking (regular-expressions.info/catastrophic.html). This can go unnoticed until one day your server hangs with 100% CPU because a user used a "strange" password. Example: ^([a-z0-9]+){8,}$ (can you see the error?)
– aKzenT
...
Why Choose Struct Over Class?
...d class should only be used when necessary. Structs are much safer and bug free, especially in a multithreaded environment. Yes, you can always use a class in place of a struct, but structs are preferable.
– drewag
Sep 22 '14 at 8:22
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UI Terminology: Logon vs Login [closed]
...ell. You can also consider login as an adjective: Please enter your login information below.
– strager
Jan 2 '09 at 4:42
1
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How to get current user, and how to use User class in MVC5?
... a GUID stored as a string.
No best practice yet, but found some valuable info on extending the user profile:
Overview of Identity: https://devblogs.microsoft.com/aspnet/introducing-asp-net-identity-a-membership-system-for-asp-net-applications/
Example solution regarding how to extend the user pr...
Espresso: Thread.sleep( );
... found to make sure that ProGuard isn't removing them as unnecessary. More info here: developer.android.com/tools/help/proguard.html#keep-code
– MattMatt
Apr 26 '16 at 9:24
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Generating an Excel file in ASP.NET [closed]
...
This is a free wrapper around SpreadML--it works great.
http://www.carlosag.net/Tools/ExcelXmlWriter/
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What is the documents directory (NSDocumentDirectory)?
...
updated link with info on an app's ability to write to folders: developer.apple.com/library/mac/documentation/FileManagement/…
– phil
Apr 23 '14 at 6:48
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