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Unique fields that allow nulls in Django
...ULL just after it comes out of the database, and the rest of Django won't know/care. A quick and dirty example:
from django.db import models
class CharNullField(models.CharField): # subclass the CharField
description = "CharField that stores NULL but returns ''"
__metaclass__ = models.S...
Gulp command not found after install
...chown -R $(whoami) $(npm config get prefix)/{lib/node_modules,bin,share}
Now you should be able to run npm <whatever> without sudo. Note: You may need to restart your terminal in order for these changes to take effect.
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In Ruby how do I generate a long string of repeated text?
...string replication. When you reverse the expression, we get 999999.*("0"). Now we are talking about the * method in the FixNum class, and that method refuses to take strings as arguments. It certainly could (for example, automatically making a best-effort to convert the argument to a FixNum) but the...
SVN+SSH, not having to do ssh-add every time? (Mac OS)
I know the answer is out there, but I'm pretty Unix-dumb and probably wouldn't recognize the solution if it hit me in the face.
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Compile Views in ASP.NET MVC
...time. To let you detect these errors at compile time, ASP.NET MVC projects now include an MvcBuildViews property, which is disabled by default. To enable this property, open the project file and set the MvcBuildViews property to true, as shown in the following example:
<Project ToolsVersion="3....
How to convert a double to long without casting?
... going via the wrapper classes - and more importantly, it's more readable. Now, if you need rounding other than "always towards zero" you'll need slightly more complicated code.
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How to solve the “failed to lazily initialize a collection of role” Hibernate exception
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If you know that you'll want to see all Comments every time you retrieve a Topic then change your field mapping for comments to:
@OneToMany(fetch = FetchType.EAGER, mappedBy = "topic", cascade = CascadeType.ALL)
private Collection&l...
Android: how to make an activity return results to the activity which calls it?
...tand your last comment, sorry i am not good english, i am trying your code now, what is requestcode can i put any integer ?
– user user
Feb 9 '13 at 7:34
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In JavaScript, is returning out of a switch statement considered a better practice than using break?
...ly not a great idea. You also may have to consider your requirements right now versus in the future. If you want to change your function from option one to option two, more refactoring will be needed.
However, given that within if/else statements it is best practice to do the following:
var foo = ...
Linq select objects in list where exists IN (A,B,C)
...0% sure if it work in LINQ to entities, and have no time to check it right now. In fact it isn't too difficult to translate it to x in [A, B, C] but you have to check for yourself.
So, instead of Contains as a replacement of the ???? in your code you can use Any which is more LINQ-uish:
// Filter ...