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How can I concatenate regex literals in JavaScript?
...als, you can in fact concatenate them using this technique:
var regex1 = /foo/g;
var regex2 = /bar/y;
var flags = (regex1.flags + regex2.flags).split("").sort().join("").replace(/(.)(?=.*\1)/g, "");
var regex3 = new RegExp(expression_one.source + expression_two.source, flags);
// regex3 is now /foo...
In Python how should I test if a variable is None, True or False
...
a = 'foo' if a: print 'its true' a is not actually TRUE, it's just not none
– wesm
Apr 3 '15 at 21:06
...
Still Reachable Leak detected by Valgrind
...locations and not free'd are almost always leaks.
Here is an example
int foo(void)
{
static char *working_buf = NULL;
char *temp_buf;
if (!working_buf) {
working_buf = (char *) malloc(16 * 1024);
}
temp_buf = (char *) malloc(5 * 1024);
....
....
....
}
...
Sending command line arguments to npm script
... into run-scripts by separating with --
Terminal
npm run-script start -- --foo=3
Package.json
"start": "node ./index.js"
Index.js
console.log('process.argv', process.argv);
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How to use a variable to specify column name in ggplot
... use "" for non-variables and you use variables unquotes. aes_string(x = "foo", y = "fee", group = variable)
– mtelesha
Jun 27 '18 at 18:32
...
How to step through Python code to help debug issues?
...7, you can use the breakpoint() built-in function to enter the debugger:
foo()
breakpoint() # drop into the debugger at this point
bar()
By default, breakpoint() will import pdb and call pdb.set_trace(). However, you can control debugging behavior via sys.breakpointhook() and use of the environ...
“ImportError: No module named” when trying to run Python script
... jupyter notebook, with python source in subdirectory of ipynb file; e.g., foo.ipynb using bar/baz.py, add empty bar/__init__.py file so that notebook can use from bar.baz import MyClass
– michael
Jul 15 '17 at 19:41
...
Delete all local git branches
...you will get control codes in the output, this will lead to error: branch 'foo' not found. if you attempt to pipe it into another command. You can bypass this with the --no-color flag to git branch, but who knows what other user configurations might break things.
git branch may do other things that...
GetProperties() to return all properties for an interface inheritance hierarchy
...t;>. With a stack, the ancestry maintains an order such that interface IFoo : IBar, IBaz where IBar : IBubble and 'IBaz : IFlubber, the order of reflection becomes: IBar, IBubble, IBaz, IFlubber, IFoo`.
– IAbstract
Oct 5 '14 at 16:07
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'UserControl' constructor with parameters in C#
...hat you can do with this is show in the designer a message like "parameter foo needs setting for runtime". To indicate the need to setup the parameters you would normally pass in using a constructor. The setting of the parameter may need to handle some of the controls setup which would usually be do...