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how perform grep operation on all files in a directory
... "grep -r $PATTERN ." is sufficient. For recursive grep you do not need to specify all files
– Cougar
Oct 2 '13 at 6:26
1
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Increment a database field by 1
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Updating an entry:
A simple increment should do the trick.
UPDATE mytable
SET logins = logins + 1
WHERE id = 12
Insert new row, or Update if already present:
If you would like to update a previously existing row, or insert it if it doesn't already exist, you c...
Have a reloadData for a UITableView animate when changing
...e a different number of sections and cells per section. Ideally, it would do some cool animation when the table grows or shrinks.
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How to print a date in a regular format?
...and Python tried to represent the set of data, using repr().
The How: what do you want to do with that?
Well, when you manipulate dates, keep using the date objects all long the way. They got thousand of useful methods and most of the Python API expect dates to be objects.
When you want to display t...
Mod of negative number is melting my brain
...ing to mod an integer to get an array position so that it will loop round. Doing i %
arrayLength works fine for positive numbers but for negative numbers it all goes wrong.
...
How to COUNT rows within EntityFramework without loading contents?
... Can you tell me why is it different with the SelectMany? I don't understand. I do it without SelectMany but it gets really slow because I have over 20 million records. I tried the answer from Yang Zhang and works great, just wanted to know what the SelectMany does.
...
Difference between $.ajax() and $.get() and $.load()
... to $.get() but adds functionality which allows you to define where in the document the returned data is to be inserted. Therefore really only usable when the call only will result in HTML. It is called slightly differently than the other, global, calls, as it is a method tied to a particular jQuery...
Set UILabel line spacing
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Edit: Evidently NSAttributedString will do it, on iOS 6 and later. Instead of using an NSString to set the label's text, create an NSAttributedString, set attributes on it, then set it as the .attributedText on the label. The code you want will be something like th...
Unfortunately MyApp has stopped. How can I solve this?
...n for solving your problem.
Android Studio
In the bottom bar of the window, click on the Logcat button. Alternatively, you can press alt+6. Make sure your emulator or device is selected in the Devices panel. Next, try to find the stack trace, which is shown in red. There may be a lot of stuff lo...
How do I create an immutable Class?
...ther return a copy or a read-only version (for example, using ArrayList.ReadOnly or similar - you can combine this with the previous point and store a read-only copy to be returned when callers access it), return an enumerator, or use some other method/property that allows read-only access into the ...