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How to find event listeners on a DOM node when debugging or from the JavaScript code?
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Is it possible to GROUP BY multiple columns using MySQL?
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GROUP BY col1, col2, col3
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How do I print the elements of a C++ vector in GDB?
... in GDB:
(gdb) print myVector
This will produce an output similar to:
$1 = std::vector of length 3, capacity 4 = {10, 20, 30}
To achieve above, you need to have gdb 7 (I tested it on gdb 7.01) and some python pretty-printer. Installation process of these is described on gdb wiki.
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Javascript replace with reference to matched group?
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Oh, or you could also:
"hello _there_".replace(/_(.*?)_/, "<div>$1</div>")
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How can I list (ls) the 5 last modified files in a directory?
...y using head or tail. If you want the 5 most-recently modified files:
ls -1t | head -5
The -1 (that's a one) says one file per line and the head says take the first 5 entries.
If you want the last 5 try
ls -1t | tail -5
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Ruby 2.0.0p0 IRB warning: “DL is deprecated, please use Fiddle”
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The message you received is common when you have ruby 2.0.0p0 (2013-02-24) on top of Windows.
The message "DL is deprecated, please use Fiddle" is not an error; it's only a warning.
The source is the Deprecation notice for DL introduced some time ago in dl.rb ( see revisions/37910 ).
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Using parameters in batch files at Windows command line
...through the command line can be accessed in batch files with the notation %1 to %9. There are also two other tokens that you can use:
%0 is the executable (batch file) name as specified in the command line.
%* is all parameters specified in the command line -- this is very useful if you want to fo...
How can I count the number of matches for a regex?
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177
matcher.find() does not find all matches, only the next match.
Solution for Java 9+
long mat...
Where does Oracle SQL Developer store connections?
I have an application that I can't get connected to my Oracle Database 11g Express Edition. I created a test database in this edition, and I can connect to the database fine using Oracle SQL Developer, create tables, views etc. However, I'm having a hard time getting connected via my application. Wh...
Why isn't my Pandas 'apply' function referencing multiple columns working? [closed]
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381
Seems you forgot the '' of your string.
In [43]: df['Value'] = df.apply(lambda row: my_test(row...