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Django 1.7 - makemigrations not detecting changes
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If you're changing over from an existing app you made in django 1.6, then you need to do one pre-step (as I found out) listed in the documentation:
python manage.py makemigrations your_app_label
The documentation does not make it obvious that ...
Are GUID collisions possible?
...nt one was inserted 3 weeks ago. Not believing this, I restored a database from 2 weeks backup, and the guid was there. Checked the code, the new guid was freshly generated no doubt about it. Pow guid collision, happened only once, but I really wish I would have won at lotto instead,the chance is gr...
Save plot to image file instead of displaying it using Matplotlib
...-and-dirty script to generate plots on the fly. I am using the code below (from Matplotlib documentation) as a starting point:
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Parse v. TryParse
... Parse throws a number of different exceptions so if all it had was a bool from TryParse then it wouldn't know which one to throw.
– Greg Beech
Jan 22 '09 at 8:42
5
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What is getattr() exactly and how do I use it?
...ct.x, because you don't know in advance which attribute you want (it comes from a string). Very useful for meta-programming.
you want to provide a default value. object.y will raise an AttributeError if there's no y. But getattr(object, 'y', 5) will return 5.
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Is there any way to git checkout previous branch?
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From the release notes for 1.6.2
@{-1} is a way to refer to the last branch you were on. This is
accepted not only where an object name is expected, but anywhere a
branch name is expected and acts as if you typed the...
How do you trigger a block after a delay, like -performSelector:withObject:afterDelay:?
...cept no parameters, but you can just let the block capture those variables from your local scope instead.
int parameter1 = 12;
float parameter2 = 144.1;
// Delay execution of my block for 10 seconds.
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, 10 * NSEC_PER_SEC), dispatch_get_main_queue(), ^{
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Can dplyr package be used for conditional mutating?
...mark might not be quite fair - in addition to not receiving the same input from the 2nd iteration forward (which might affect timing since DT$g is already allocated?), the result also propagates back to ans1 and therefore might (if R's optimizer deems it necessary? Not sure on this...) avoid another...
Android Facebook style slide
...he best menus I could come up with:
Android sliding menu demo
Screenshot from emulator (mid-scroll):
Screenshot from device (full-scroll). Note my icon is not as wide as the Facebook menu icon, so the menu view and 'app' view are not aligned.
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Can “git pull --all” update all my local branches?
...eful. The option is passed along to git fetch, which then fetches all refs from all remotes, instead of just the needed one; pull then merges (or in your case, rebases) the appropriate single branch.
If you want to check out other branches, you're going to have to check them out. And yes, merging (...