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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...
Android - How To Override the “Back” button so it doesn't Finish() my Activity?
... This solution won't bring the activity back when you re-launch the app from the home screen (if there is another activity on the task stack).
– IgorGanapolsky
Aug 24 '17 at 17:09
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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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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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What is SaaS, PaaS and IaaS? With examples
... Hadoop is based on previous works by Google(GFS and MapReduce), it is not from Google. It is an Apache project. You can find more here. It is just a distributed computing platform and does not fall into any of these service models, IMHO.
Microsoft's Windows Azure is again an example of IaaS.
As f...
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...
Delete files older than 10 days using shell script in Unix [duplicate]
...ew to shell scripts, can anyone help? I want to delete scripts in a folder from the current date back to 10 days.
The scripts looks like:
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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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