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Why does base64 encoding require padding if the input length is not divisible by 3?
...ence is lost. However, if padded sequences are used, there's no ambiguity, and the sequence as a whole can be decoded correctly.
Edit: An Illustration
Suppose we have a program that base64-encodes words, concatenates them and sends them over a network. It encodes "I", "AM" and "TJM", sandwiches th...
Pandas - Get first row value of a given column
...2
There is a difference between df_test['Btime'].iloc[0] (recommended) and df_test.iloc[0]['Btime']:
DataFrames store data in column-based blocks (where each block has a single
dtype). If you select by column first, a view can be returned (which is
quicker than returning a copy) and the origina...
How do I call an Angular.js filter with multiple arguments?
... out = out.toUpperCase();
}
return out;
}
});
and from the html using the template we can call that filter like below
<h1>{{inputString| reverse:true }}</h1>
here if you see , the first parameter is inputString and second parameter is true which is combi...
Refresh all files in buffer from disk in vim
The command to refresh a file from version on disk is :e!
5 Answers
5
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How can I profile Python code line-by-line?
I've been using cProfile to profile my code, and it's been working great. I also use gprof2dot.py to visualize the results (makes it a little clearer).
...
how do I check in bash whether a file was created more than x time ago?
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you can drop 'test' and the backticks. This is analogous to 'if (test == true)' vs 'if (test)'
– guns
Sep 9 '09 at 19:51
2
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How to get the original value of an attribute in Rails
...ibute will give you the previous value.
For rails 5.1+
Copied from Lucas Andrade's answer below: https://stackoverflow.com/a/50973808/9359123
Appending _was is deprecated in rails 5.1, now you should append _before_last_save
Something like:
before_save object
do_something_with object.name_...
NameError: global name 'unicode' is not defined - in Python 3
...
If you need to have the script keep working on python2 and 3 as I did, this might help someone
import sys
if sys.version_info[0] >= 3:
unicode = str
and can then just do for example
foo = unicode.lower(foo)
...
Hibernate dialect for Oracle Database 11g?
...oblem with the (deprecated) dialect org.hibernate.dialect.Oracledialect and Oracle 11g database using hibernate.hbm2ddl.auto = validate mode.
With this dialect Hibernate was unable to found the sequences (because the implementation of the getQuerySequencesString() method, that...
How to write one new line in Bitbucket markdown?
...ot seeing the special characters on your browser/platform: → is an arrow and should represent a blank space
– auco
Jun 25 '16 at 19:53
1
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