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How to set UICollectionViewDelegateFlowLayout?
...ller maintains a reference to a UICollectionView. The controller should modify the built-in flow layout using the UICollectionViewDelegateFlowLayout.
...
UIActivityViewController crashing on iOS 8 iPads
...er using the new UIPopoverPresentationController, it requires that you specify an anchor point for the presentation of the popover using one of the three following properties:
barButtonItem
sourceView
sourceRect
In order to specify the anchor point you will need to obtain a reference to the UIAc...
Best GWT widget library? [closed]
...c) and incorporate it to your project. Try to use extended components ONLY if you don't see a way to do it with vanilla GWT. This way you don't tie yourself to these libraries which are ALWAYS a pain when you try to do something that doesn't appear in the demo application, contain many bugs and thei...
Recursion or Iteration?
Is there a performance hit if we use a loop instead of recursion or vice versa in algorithms where both can serve the same purpose? Eg: Check if the given string is a palindrome.
I have seen many programmers using recursion as a means to show off when a simple iteration algorithm can fit the bill.
D...
Checkout another branch when there are uncommitted changes on the current branch
...you run:
git checkout branch2
Sometimes Git says "OK, you're on branch2 now!" Sometimes, Git says "I can't do that, I'd lose some of your changes."
If Git won't let you do it, you have to commit your changes, to save them somewhere permanent. You may want to use git stash to save them; this is...
Error installing libv8: ERROR: Failed to build gem native extension
... for the V8 engine used by therubyracer,
you may need to use libv8, even if you have V8 installed already. If
you wish to use your own V8 installation, rather than have it built
for you, use the --with-system-v8 option.
For more you can go through the documentation of libv8 on github
...
JavaScript equivalent to printf/String.Format
...nt of the C/PHP printf() or for C#/Java programmers, String.Format() ( IFormatProvider for .NET).
50 Answers
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How can I convert a datetime object to milliseconds since epoch (unix time) in Python?
...method timestamp:
import datetime
seconds_since_epoch = datetime.datetime.now().timestamp()
Your question stated that you needed milliseconds, which you can get like this:
milliseconds_since_epoch = datetime.datetime.now().timestamp() * 1000
If you use timestamp on a naive datetime object, the...
Is there any git hook for pull?
...
The githooks man page is a complete list of hooks. If it's not on there, it doesn't exist.
That said, there is a post-merge hook, and all pulls include a merge, though not all merges are pulls. It's run after merges, and can't affect the outcome. It never gets executed if th...
MySQL “NOT IN” query
...ble2 ON table2.principal=table1.principal
WHERE table2.principal IS NULL
If you want to check multiple tables to make sure it's not present in any of the tables (like in SRKR's comment), you can use this:
SELECT table1.*
FROM table1
LEFT JOIN table2 ON table2.name=table1.name
LEFT JOIN table3 ON ...