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sed command with -i option (in-place editing) works fine on Ubuntu but not Mac [duplicate]
... That's simpler than trying to work out which variant of sed you have installed or other gizmos I've seen suggested. I hope you keep the file under version control (or otherwise backed up) so that you can recover if there's a bug in your sed script. Of course, the .bak file gives you that protect...
Python call function within class
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Since these are member functions, call it as a member function on the instance, self.
def isNear(self, p):
self.distToPoint(p)
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Is it secure to store passwords as environment variables (rather than as plain text) in config files
...e that is meant to look like a configuration file. An attacker will eventually figure out what's going on, or stumble across it.
Security provided by encryption that is trivial to break, (think caesar cipher!).
Security provided by encryption that can be broken with some effort.
Security provided b...
Python argparse command line flags without arguments
...a look at http://docs.python.org/dev/library/argparse.html#action (specifically store_true and store_false)
import argparse
parser = argparse.ArgumentParser()
parser.add_argument('-w', action='store_true')
where action='store_true' implies default=False.
Conversely, you could haveaction='store_...
Why are local variables not initialized in Java?
... edited Feb 3 '14 at 13:33
allprog
15.7k88 gold badges5353 silver badges9393 bronze badges
answered Jan 6 '09 at 7:18
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How to select an element by classname using jqLite?
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Essentially, and as-noted by @kevin-b:
// find('#id')
angular.element(document.querySelector('#id'))
//find('.classname'), assumes you already have the starting elem to search from
angular.element(elem.querySelector('.classname'))...
When should you use a class vs a struct in C++?
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A struct with no modifiers or methods is called a POD struct, which exists as a backwards compatible interface with C libraries as it is (supposedly) guaranteed to be laid out as though it were a C struct. Apart from this one exception though, the only difference is ...
What is the meaning of prepended double colon “::”?
...space you're currently in. For instance, if you had two different classes called Configuration as such:
class Configuration; // class 1, in global namespace
namespace MyApp
{
class Configuration; // class 2, different from class 1
function blah()
{
// resolves to MyApp::Configur...
Using git commit -a with vim
...rupt the commit when I quit vim?
There are 2 ways:
:cq or :cquit
Delete all lines of the commit message, including comments, and then :wq
Either way will give git an error code, so it will not proceed with the commit. This is particularly useful with git commit --amend.
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How can I obtain an 'unbalanced' grid of ggplots?
...RonGejman it's easy if you print the 3x2 matrix on screen: first column is all 1s, that's where the first plot lives, spanning the three rows; second column contains plots 2, 3, 4, each occupying one row.
– baptiste
Sep 30 '15 at 18:59
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