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Refactoring in Vim
...re useful I find Vim for refactoring: feeling comfortable saving/restoring from registers, incrementing/decrementing register counter variables, cleaning/saving macro recordings to file for later use, etc.
Update
Since writing this more videocasts for the methods I describe have been published o...
How to count total number of watches on a page?
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Yes, all scopes descend from the $rootScope, only inheritence is "isolated" in isolated scopes. Isolated scopes are often used in directives - here you don't want app-variables from parents to interfere.
– markmarijnissen
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Single quotes vs. double quotes in Python [closed]
... I wonder if the single quotes for symbol-like things actually comes from the quote expression shortcut in Lisp/Scheme. In any case, it's intuitive. Also, me mateys, if we're following PEP 8 style guidelines, the functions really should be named lights_message() and is_pirate().
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Why does Enumerable.All return true for an empty sequence? [duplicate]
... the identity element of the "and" operation. Likewise, the false you get from Any for the empty sequence is the identity for logical "or".
If you think of All as "there are no elements in the sequence that are not", this might make more sense.
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How to convert string into float in JavaScript?
I am trying to parse two values from a datagrid. The fields are numeric, and when they have a comma (ex. 554,20), I can't get the numbers after the comma. I've tried parseInt and parseFloat . How can I do this?
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How to check “hasRole” in Java Code with Spring Security?
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Instead of using a loop to find the authority from UserDetails you can do:
Collection<? extends GrantedAuthority> authorities = authentication.getAuthorities();
boolean authorized = authorities.contains(new SimpleGrantedAuthority("ROLE_ADMIN"));
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Matrix Transpose in Python
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if you're going to iterate through the results, izip from itertools can save memory for large arrays.
– Antony Hatchkins
Mar 28 '13 at 8:38
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How to update a plot in matplotlib?
...called within a for loop, similar to Matlab's drawnow.
An example usage:
from pylab import figure, plot, ion, linspace, arange, sin, pi
def draw_fig():
# can be arbitrarily complex; just to draw a figure
#figure() # don't call!
plot(t, x)
#show() # don't call!
N = 1e3
figure() # c...
How to sum a variable by group
...n has numbers that represent the number of times I saw the specific groups from "Category".
15 Answers
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What is the opposite of 'parse'? [closed]
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This may be the most useful answer from my perspective.
– JosephDoggie
Dec 17 '14 at 17:25
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