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What is the use of printStackTrace() method in Java?
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This is normal, with the 1st one you call the toString() of the error, and in the 2nd you ask to print all the stackTrace from the error. That's 2 différents things.
– Jon
May 17 '16 at 8:08
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IN vs OR in the SQL WHERE Clause
...list and then uses a binary search. I would imagine that OR evaluates them one by one in no particular order. So IN is faster in some circumstances.
The best way to know is to profile both on your database with your specific data to see which is faster.
I tried both on a MySQL with 1000000 rows. ...
How to represent multiple conditions in a shell if statement?
...g; c = $c; true"
else echo "g = $g; c = $c; false"
fi
done
done
Example run, using Bash 3.2.57 on Mac OS X:
g = 1; c = 123; true
g = 1; c = 456; false
g = 1; c = 789; false
g = 2; c = 123; false
g = 2; c = 456; true
g = 2; c = 789; false
g = 3; c = 123; false
g = 3; c = 456; f...
Check if a string is html or not
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I'm honestly surprised I didn't get more downvotes for the snark.
– zzzzBov
Mar 17 '13 at 17:56
8
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Git: Recover deleted (remote) branch
...ried fsck earlier; do you know how to find out which commit is the correct one? I've got 20 to try.
– Craig Walker
Jan 2 '10 at 19:08
1
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How to programmatically set maxLength in Android TextView?
...rs = filters.plus(InputFilter.LengthFilter(max)) Don't overwrite existing ones
– ersin-ertan
Oct 30 '18 at 4:20
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How to work with Git branches and Rails migrations
...ing data will be lost.
You'll probably only want to run production off of one branch which you're very careful with, so these steps don't apply there (just run rake db:migrate as usual there). But in development, it should be no big deal to recreate the database from the schema, which is what rake...
PHP PDO returning single row
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Just fetch. only gets one row. So no foreach loop needed :D
$row = $STH -> fetch();
example (ty northkildonan):
$dbh = new PDO(" --- connection string --- ");
$stmt = $dbh->prepare("SELECT name FROM mytable WHERE id=4 LIMIT 1");
$stmt...
Prevent multiple instances of a given app in .NET?
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Use Mutex. One of the examples above using GetProcessByName has many caveats. Here is a good article on the subject:
http://odetocode.com/Blogs/scott/archive/2004/08/20/401.aspx
[STAThread]
static void Main()
{
using(Mutex mutex =...
iOS multiline label in Interface builder
...am writing the label, but when I press enter to accept it just all goes on one line.
– Samuli Lehtonen
Jul 2 '11 at 14:30
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