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Why do you need to invoke an anonymous function on the same line?
...e is your basic declared function.
Ex. 1:
var message = 'SO';
function foo(msg) {
alert(msg);
}
foo(message);
Functions are objects, and can be grouped. So let's throw parens around the function.
Ex. 2:
var message = 'SO';
function foo(msg) { //declares foo
alert(msg);
}
(foo)(m...
Can Python test the membership of multiple values in a list?
...ant, and will work in nearly all cases:
>>> all(x in ['b', 'a', 'foo', 'bar'] for x in ['a', 'b'])
True
The expression 'a','b' in ['b', 'a', 'foo', 'bar'] doesn't work as expected because Python interprets it as a tuple:
>>> 'a', 'b'
('a', 'b')
>>> 'a', 5 + 2
('a', 7)
...
How to perform runtime type checking in Dart?
...tp://www.dartlang.org/articles/optional-types/.
Here's an example:
class Foo { }
main() {
var foo = new Foo();
if (foo is Foo) {
print("it's a foo!");
}
}
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improve this answer
...
“Variable” variables in Javascript?
... your problem.
If you have a fixed set of names, such as
// BAD
var foo = 42;
var bar = 21;
var key = 'foo';
console.log(eval(key));
store the those name/values as properties of an object and use bracket notation to look them up dynamically:
// GOOD
var obj = {
foo: 42,
...
How to mock an import
...e submodules, but you'll want to mock each module. Say you have this:
from foo import This, That, andTheOtherThing
from foo.bar import Yada, YadaYada
from foo.baz import Blah, getBlah, boink
To mock, simply do the below before the module that contains the above is imported:
sys.modules['foo'] = Mag...
Iterate over the lines of a string
...
Here are three possibilities:
foo = """
this is
a multi-line string.
"""
def f1(foo=foo): return iter(foo.splitlines())
def f2(foo=foo):
retval = ''
for char in foo:
retval += char if not char == '\n' else ''
if char == '\n':
...
What does if __name__ == “__main__”: do?
...e how imports and scripts work. Suppose the following is in a file called foo.py.
# Suppose this is foo.py.
print("before import")
import math
print("before functionA")
def functionA():
print("Function A")
print("before functionB")
def functionB():
print("Function B {}".format(math.sqrt(...
How can I ignore everything under a folder in Mercurial
...sitory is in E:\Dev for example, hg status will apply the patterns against foo/bar/file1.c and such. Anchors apply to this path.
So:
Glob applies to path elements and is rooted to element parts
foo matches any folder (or file) named foo (not to "foobar" nor "barfoo")
*foo* matches any folder or f...
Select random row from a sqlite table
... How to extend this solution to a join? When using SELECT a.foo FROM a JOIN b ON a.id = b.id WHERE b.bar = 2 ORDER BY RANDOM() LIMIT 1; I always get the same row.
– Helmut Grohne
Sep 19 '13 at 8:18
...
Rails Model, View, Controller, and Helper: what goes where?
...rom controller to view" anti-pattern. Instead of this:
# app/controllers/foos_controller.rb:
class FoosController < ApplicationController
def show
@foo = Foo.find(...)
end
end
#app/views/foos/show.html.erb:
...
<%= @foo.bar %>
...
Try moving it to a getter that is available a...