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Should you declare methods using overloads or optional parameters in C# 4.0?
...th many permutations of the method signature for no more benefit. Consider Foo(A, B, C) requires Foo(A), Foo(B), Foo(C), Foo(A, B), Foo(A, C), Foo(B, C).
– Dan Lugg
May 7 '17 at 23:46
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Negative matching using grep (match lines that do not contain foo)
...t, the following may be what you're looking for grep "" /dev/null * | grep foo | grep -v bar | cut -d: -f1 | sort -u (why the first grep?, there's always a way :))
– Motti
Oct 25 '17 at 7:18
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define() vs. const
...nts: Either using the const keyword or using the define() function:
const FOO = 'BAR';
define('FOO', 'BAR');
The fundamental difference between those two ways is that const defines constants at compile time, whereas define defines them at run time. This causes most of const's disadvantages. Some ...
How to import other Python files?
... 1, Import a python module with python interpreter:
Put this in /home/el/foo/fox.py:
def what_does_the_fox_say():
print("vixens cry")
Get into the python interpreter:
el@apollo:/home/el/foo$ python
Python 2.7.3 (default, Sep 26 2013, 20:03:06)
>>> import fox
>>> fox.what_d...
Difference between
...
extends
The wildcard declaration of List<? extends Number> foo3 means that any of these are legal assignments:
List<? extends Number> foo3 = new ArrayList<Number>(); // Number "extends" Number (in this context)
List<? extends Number> foo3 = new ArrayList<Intege...
How to get a subset of a javascript object's properties
... Destructuring becomes more complicated if a key is non-alphanumeric, e.g. foo_bar.
The downside is that this requires to duplicate a list of keys, this results in verbose code in case a list is long. Since destructuring duplicates object literal syntax in this case, a list can be copied and pasted...
What does asterisk * mean in Python? [duplicate]
...e examples:
Example 1:
# Excess keyword argument (python 2) example:
def foo(a, b, c, **args):
print "a = %s" % (a,)
print "b = %s" % (b,)
print "c = %s" % (c,)
print args
foo(a="testa", d="excess", c="testc", b="testb", k="another_excess")
As you can see in the above example, w...
Convert a String representation of a Dictionary to a dictionary?
...gt;>> import ast
>>> ast.literal_eval("{'muffin' : 'lolz', 'foo' : 'kitty'}")
{'muffin': 'lolz', 'foo': 'kitty'}
This is safer than using eval. As its own docs say:
>>> help(ast.literal_eval)
Help on function literal_eval in module ast:
literal_eval(node_or_string)
...
do { … } while (0) — what is it good for? [duplicate]
...ter, and still use within an if statement. An example might help:
#define FOO(x) foo(x); bar(x)
if (condition)
FOO(x);
else // syntax error here
...;
Even using braces doesn't help:
#define FOO(x) { foo(x); bar(x); }
Using this in an if statement would require that you omit the semico...
How do I create a constant in Python?
...ust don't change it.
If you are in a class, the equivalent would be:
class Foo(object):
CONST_NAME = "Name"
if not, it is just
CONST_NAME = "Name"
But you might want to have a look at the code snippet Constants in Python by Alex Martelli.
As of Python 3.8, there's a typing.Final variable anno...