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Why does “split” on an empty string return a non-empty array?
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For the same reason that
",test" split ','
and
",test," split ','
will return an array of size 2. Everything before the first match is returned as the first element.
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How do I execute a program from Python? os.system fails due to spaces in path
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import subprocess
subprocess.call(['C:\\Temp\\a b c\\Notepad.exe', 'C:\\test.txt'])
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How to get method parameter names?
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I think what you're looking for is the locals method -
In [6]: def test(a, b):print locals()
...:
In [7]: test(1,2)
{'a': 1, 'b': 2}
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What is a callback?
...ck callback)
{
callback("Hello world");
}
public void Test()
{
WorkCompletedCallBack callback = TestCallBack; // Notice that I am referencing a method without its parameter
DoWork(callback);
}
public void TestCallBack(string result)
{
Con...
How can I pad an integer with zeros on the left?
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Found this example... Will test...
import java.text.DecimalFormat;
class TestingAndQualityAssuranceDepartment
{
public static void main(String [] args)
{
int x=1;
DecimalFormat df = new DecimalFormat("00");
System.out.p...
How do I (or can I) SELECT DISTINCT on multiple columns?
... the performance of the currently accepted answer by factor 10 - 15 (in my tests on PostgreSQL 8.4 and 9.1).
But this is still far from optimal. Use a NOT EXISTS (anti-)semi-join for even better performance. EXISTS is standard SQL, has been around forever (at least since PostgreSQL 7.2, long before...
Difference between if () { } and if () : endif;
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ERROR: <?php if(TRUE){?> test <?php }?> <?php else{ ?> test2 <?php }?>
– Yousha Aleayoub
May 6 '17 at 16:01
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Node.js check if file exists
...{
console.log('Found file');
}
The API doc says how existsSync work:
Test whether or not the given path exists by checking with the file system.
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How do I detect if I am in release or debug mode?
... DEBUG to true, it should work. If you are seeing this in one of the 1.3.0 test releases, or if you have a reproducible test case for 1.2.2, please file an issue. I do not see any outstanding issues reporting this problem.
– CommonsWare
Jul 12 '15 at 23:39
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Installing vim with ruby support (+ruby)
...hg/ vim
cd vim
./configure --enable-rubyinterp
make
sudo make install
To test if things look fancy:
vim --version | grep ruby
Should return something like:
-python3 +quickfix +reltime -rightleft +ruby +scrollbind +signs +smartindent
Ruby should have plus now. Another trick to test it - enter...