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Remove the last line from a file in Bash
I have a file, foo.txt , containing the following lines:
14 Answers
14
...
How do I define global variables in CoffeeScript?
... as properties on window
This means you need to do something like window.foo = 'baz';, which handles the browser case, since there the global object is the window.
Node.js
In Node.js there's no window object, instead there's the exports object that gets passed into the wrapper that wraps the Nod...
How does the @property decorator work in Python?
... the @decorator syntax is just syntactic sugar; the syntax:
@property
def foo(self): return self._foo
really means the same thing as
def foo(self): return self._foo
foo = property(foo)
so foo the function is replaced by property(foo), which we saw above is a special object. Then when you use @...
A regex to match a substring that isn't followed by a certain other substring
I need a regex that will match blahfooblah but not blahfoobarblah
5 Answers
5
...
How to initialize private static members in C++?
... should be in the header file (Or in the source file if not shared).
File: foo.h
class foo
{
private:
static int i;
};
But the initialization should be in source file.
File: foo.cpp
int foo::i = 0;
If the initialization is in the header file then each file that includes the header ...
Inheriting class methods from modules / mixins in Ruby
...idiom is to use included hook and inject class methods from there.
module Foo
def self.included base
base.send :include, InstanceMethods
base.extend ClassMethods
end
module InstanceMethods
def bar1
'bar1'
end
end
module ClassMethods
def bar2
'bar2'
en...
How to tell if a string is not defined in a Bash shell script
...
~> if [ -z $FOO ]; then echo "EMPTY"; fi
EMPTY
~> FOO=""
~> if [ -z $FOO ]; then echo "EMPTY"; fi
EMPTY
~> FOO="a"
~> if [ -z $FOO ]; then echo "EMPTY"; fi
~>
-z works for undefined variables too. To distinguish between...
Error: “dictionary update sequence element #0 has length 1; 2 is required” on Django 1.4
...stance, the following functions throw the error from the question:
url(r'^foo/(?P<bar>[A-Za-z]+)/$', views.FooBar.as_view(), 'foo')
path('foo/{slug:bar}/', views.FooBar, 'foo')
But these actually work:
url(r'^foo/(?P<bar>[A-Za-z]+)/$', views.FooBar.as_view(), name='foo')
path('foo/{s...
What are some examples of commonly used practices for naming git branches? [closed]
...roup tokens
Use "grouping" tokens in front of your branch names.
group1/foo
group2/foo
group1/bar
group2/bar
group3/bar
group1/baz
The groups can be named whatever you like to match your workflow. I like to use short nouns for mine. Read on for more clarity.
Short well-defined tokens
Choose...
How to pipe stdout while keeping it on screen ? (and not to a output file)
...on some non Unix environments like cygwin too.
echo 'ee' | tee /dev/tty | foo
Reference: The Open Group Base Specifications Issue 7
IEEE Std 1003.1, 2013 Edition, §10.1:
/dev/tty
Associated with the process group of that process, if any. It is
useful for programs or shell procedures ...