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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...
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...
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...
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...
Best way to give a variable a default value (simulate Perl ||, ||= )
I love doing this sort of thing in Perl: $foo = $bar || $baz to assign $baz to $foo if $bar is empty or undefined. You also have $foo ||= $bletch which will only assign $bletch to $foo if $foo is not defined or empty.
...
What does principal end of an association means in 1:1 relationship in Entity framework
... so in your case you should use:
public class Boo
{
[Key, ForeignKey("Foo")]
public string BooId{get;set;}
public Foo Foo{get;set;}
}
Or fluent mapping
modelBuilder.Entity<Foo>()
.HasOptional(f => f.Boo)
.WithRequired(s => s.Foo);
...
Is a `=default` move constructor equivalent to a member-wise move constructor?
...copy will be used for both members: http://coliru.stacked-crooked.com/a/171fd0ce335327cd - prints:
movable::copy
nonmovable::copy
So probably putting =default everywhere still makes sense. It doesn't mean that your move expressions will always move, but it makes chances of this higher.
One more ...