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How do I check whether a file exists without exceptions?
...open_it(), it's safer to use a try around the attempt to open it. Checking and then opening risks the file being deleted or moved or something between when you check and when you try to open it.
If you're not planning to open the file immediately, you can use os.path.isfile
Return True if path ...
PG undefinedtable error relation users does not exist
...llowing:
rake db:reset
The rake db:reset task will drop the database and set it up again. This is functionally equivalent to rake db:drop db:setup.
This is not the same as running all the migrations. It will only use the
contents of the current schema.rb file. If a migration can't be ro...
Concatenating multiple text files into a single file in Bash
What is the quickest and most pragmatic way to combine all *.txt file in a directory into one large text file?
12 Answers
...
Manually map column names with class properties
...
Column Attribue would be handy for mapping stored procedure results.
– Ronnie Overby
Nov 2 '12 at 17:48
2
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StringBuilder vs String concatenation in toString() in Java
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Version 1 is preferable because it is shorter and the compiler will in fact turn it into version 2 - no performance difference whatsoever.
More importantly given we have only 3
properties it might not make a
difference, but at what point do you
switch from conc...
Add legend to ggplot2 line plot
... about legends in ggplot2. I managed to plot three lines in the same graph and want to add a legend with the three colors used. This is the code used
...
How to remove CocoaPods from a project?
...oaPods version 0.39.0, they could change with new versions.
Delete the standalone files (Podfile Podfile.lock and your Pods directory)
Delete the generated xcworkspace
Open your xcodeproj file, delete the references to Pods.xcconfig and libPods.a (in the Frameworks group)
Under your Build Phases d...
Remove all multiple spaces in Javascript and replace with single space [duplicate]
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i'm reading data in from a txt file (via AJAX), and @InfinitiesLoop regex worked fine but Josiah's didn't
– Jeff
Apr 23 '12 at 13:48
2
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How to hide “Showing 1 of N Entries” with the dataTables.js library
...
try this for hide
$('#table_id').DataTable({
"info": false
});
and try this for change label
$('#table_id').DataTable({
"oLanguage": {
"sInfo" : "Showing _START_ to _END_ of _TOTAL_ entries",// text you want show for info section
},
});
...
Accessing MP3 metadata with Python [closed]
... looked at couldn't. You'll have to install using pip or download the tar and execute python setup.py install from the source folder.
Relevant examples from the website are below.
Reading the contents of an mp3 file containing either v1 or v2 tag info:
import eyeD3
tag = eyeD3.Tag()
tag.lin...