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How do I create an immutable Class?
...e case, you should copy away whatever state you will want to retain and avoid returning entire mutable objects, unless you copy them before giving them back to the caller - another option is to return only immutable "sections" of the mutable object - thanks to @Brian Rasmussen for encouraging me to ...
Should I use Python 32bit or Python 64bit
...rio, the 64 bits performs better with the inconvenient that John La Rooy said; if not, stick with the 32 bits.
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Undo git mv (rename)
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git mv file2 file1
Updates the index for both old and new paths automatically.
Check documentation of git mv
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Plot logarithmic axes with matplotlib in python
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First of all, it's not very tidy to mix pylab and pyplot code. What's more, pyplot style is preferred over using pylab.
Here is a slightly cleaned up code, using only pyplot functions:
from matplotlib import pyplot
a = [ pow(10,i) for i in range(10) ]...
Reset the database (purge all), then seed a database
... and then recreates the database and includes your seeds.rb file.
http://guides.rubyonrails.org/migrations.html#resetting-the-database
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How to switch back to 'master' with git?
...red May 24 '19 at 7:16
Sachin SridharSachin Sridhar
33622 silver badges1212 bronze badges
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Print list without brackets in a single row
...= [1, 2, 4, 3]
>>> print(", " . join(arr))
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: sequence item 0: expected string, int found
>>> sarr = [str(a) for a in arr]
>>> print(", " . join(sarr))
1, 2, 4, 3
>>>
Di...
Case preserving substitute in Vim
...use, because that is required for the useful :set smartcase), vim will consider 'a' == 'A'!!
Crazy as it is, we really should account for it: Because it is user-settings-dependent, == should NEVAR be used! (Except where that would actually be what you want.) I will even follow the recommendati...
Generating UML from C++ code? [closed]
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I've developed a tool called Doxygraph which can parse the XML generated by Doxygen and turn it into an interactive UML class diagram which you can view in a web browser or import into any software that can read Graphviz "dot" files.
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How do I read the first line of a file using cat?
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I suppose it's silly to call out a 'useless use of cat' on a line specifically designed to use cat, isn't it.
– jkerian
May 24 '11 at 19:20
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