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How do I base64 encode (decode) in C?
...f 256, since char is signed on most architectures, you are really indexing from -128 to 127. Any character with the high bit set will cause you to read outside the allocated memory. Forcing the data lookup to be an unsigned char clears that up. You still get garbage out for garbage in, but you won't...
read subprocess stdout line by line
...lity.py'],stdout=subprocess.PIPE)
I have needed this when calling python from within python.
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Convert base class to derived class [duplicate]
...her options would basically come out to automate the copying of properties from the base to the derived instance, e.g. using reflection.
The code you posted using as will compile, as I'm sure you've seen, but will throw a null reference exception when you run it, because myBaseObject as DerivedClas...
HTML inside Twitter Bootstrap popover
...t parts of the code is below:
HTML:
<!--
Note: Popover content is read from "data-content" and "title" tags.
-->
<a tabindex="0"
class="btn btn-lg btn-primary"
role="button"
data-html="true"
data-toggle="popover"
data-trigger="focus"
title="<b>Example popover&l...
Best way to center a on a page vertically and horizontally? [duplicate]
...
The main trick in this demo is that in the normal flow of elements going from top to bottom, so the margin-top: auto is set to zero. However, an absolutely positioned element acts the same for distribution of free space, and similarly can be centered vertically at the specified top and bottom (doe...
Execute AsyncTask several times
In my Activity I use a class which extends from AsyncTask and a parameter which is an instance of that AsyncTask. When I call mInstanceOfAT.execute("") everything is fine.
But the app crash when I press an update button which calls again the AsyncTask(In case the network job didnt work). Cause the...
How to print an exception in Python?
...the sys.exc_info() function and the traceback.print_exc() function gets it from there. You’d only ever need to pass in an exception explicitly when not handling an exception or when you want to show info based on a different exception.
– Martijn Pieters♦
Oc...
What is the actual use of Class.forName(“oracle.jdbc.driver.OracleDriver”) while connecting to a dat
...iver.
It doesn't "do" anything in terms of connecting to a database, aside from ensure that the specified class is loaded by the current classloader. There is no fundamental difference between writing
Class<?> driverClass = Class.forName("oracle.jdbc.driver.OracleDriver");
// and
Class<?>...
Add column with constant value to pandas dataframe [duplicate]
...ere's how DataFrame.align() works with partially aligned indices:
In [7]: from pandas import DataFrame
In [8]: from numpy.random import randint
In [9]: df = DataFrame({'a': randint(3, size=10)})
In [10]:
In [10]: df
Out[10]:
a
0 0
1 2
2 0
3 1
4 0
5 0
6 0
7 0
8 0
9 0
In [11]: s = d...
In Python, when should I use a function instead of a method?
...eption("NYAN "*9001)
else:
print "can't kill it."
Moving away from this analogy, why do we use methods and classes? Because we want to contain data and hopefully structure our code in a manner such that it will be reusable and extensible in the future. This brings us to the notion of en...