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Hand Coded GUI Versus Qt Designer GUI [closed]
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Our experience with Designer started in Qt3.
Qt3
At that point, Designer was useful mainly to generate code that you would then compile into your application. We started using for that purpose but with all generated code, once y...
How do I create an HTML table with a fixed/frozen left column and a scrollable body?
...tally, you can position: absolute the first column (and specify its width explicitly), and then wrap the entire table in an overflow-x: scroll block. Don't bother trying this in IE7, however...
Relevant HTML & CSS:
table {
border-collapse: separate;
border-spacing: 0;
border-top...
Populating a ListView using an ArrayList?
...a ListView backed by an array of arbitrary objects. By default this class expects that the provided resource id references a single TextView. If you want to use a more complex layout, use the constructors that also takes a field id. That field id should reference a TextView in the larger layout reso...
Correct way to use StringBuilder in SQL
...straight concat you quoted. (Until/unless the JVM optimizer sees that the explicit StringBuilder in the code is unnecessary and optimizes it out, if it can.)
If the author of that code wants to use StringBuilder (there are arguments for, but also against; see note at the end of this answer), better...
Is there a way to get rid of accents and convert a whole string to regular letters?
...from using String.replaceAll() method and replacing letters one by one?
Example:
12 Answers
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Rails: FATAL - Peer authentication failed for user (PG::Error)
...these 8.2 conventions to establish your connecting user's privileges, syntax is GRANT ALL ON DATABASE [dbname] to [usrname]. This syntax works on psql 9+ just the same, but you probably can only toggle permissions on databases owned by the user before it will GRANT ALL: postgresql.org/docs/8.2/stati...
Change MySQL default character set to UTF-8 in my.cnf?
...racter-set-server = utf8
If you want to change the character set for an existing DB, let me know... your question didn't specify it directly so I am not sure if that's what you want to do.
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Retrieve a Fragment from a ViewPager
...yItem() of your Fragment(State)PagerAdapter:
public class MyPagerAdapter extends FragmentStatePagerAdapter {
SparseArray<Fragment> registeredFragments = new SparseArray<Fragment>();
public MyPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public i...
String concatenation: concat() vs “+” operator
...fference in semantics. If a is null, then a.concat(b) throws a NullPointerException but a+=b will treat the original value of a as if it were null. Furthermore, the concat() method only accepts String values while the + operator will silently convert the argument to a String (using the toString() me...
How to concatenate two MP4 files using FFmpeg?
...so they share the same codec and other parameters, then use the concat demuxer to avoid re-encoding the other inputs).
ffmpeg -i opening.mkv -i episode.mkv -i ending.mkv \
-filter_complex "[0:v] [0:a] [1:v] [1:a] [2:v] [2:a]
concat=n=3:v=1:a=1 [v] [a]" \
-map ...