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What does 'foo' really mean?
...ming question, as in any programming tutorial, you eventually come across 'foo' in the code examples. (yeah, right?)
9 Answ...
Select by partial string from a pandas DataFrame
...ost is long.
Basic Substring Search
# setup
df1 = pd.DataFrame({'col': ['foo', 'foobar', 'bar', 'baz']})
df1
col
0 foo
1 foobar
2 bar
3 baz
str.contains can be used to perform either substring searches or regex based search. The search defaults to regex-based unless you explic...
Dynamically access object property using variable
... variable, you have to use bracket notation:
var something = {
bar: 'foo'
};
var foo = 'bar';
// both x = something[foo] and something[foo] = x work as expected
console.log(something[foo]);
console.log(something.bar)
...
What is the difference between class and instance attributes?
... can be multiple objects referred to. For instance
>>> class A: foo = []
>>> a, b = A(), A()
>>> a.foo.append(5)
>>> b.foo
[5]
>>> class A:
... def __init__(self): self.foo = []
>>> a, b = A(), A()
>>> a.foo.append(5)
>>> b.f...
How can I capitalize the first letter of each word in a string?
...letters without altering the capitalization of the rest of the words (e.g. Foo becomes foo, but FOO becomes fOO). This was perfect.
– TomNysetvold
May 23 '12 at 15:13
2
...
What does ** (double star/asterisk) and * (star/asterisk) do for parameters?
...ntation.
The *args will give you all function parameters as a tuple:
def foo(*args):
for a in args:
print(a)
foo(1)
# 1
foo(1,2,3)
# 1
# 2
# 3
The **kwargs will give you all
keyword arguments except for those corresponding to a formal parameter as a dictionary.
def bar(**...
Accessing class variables from a list comprehension in the class definition
... a class method referred to x as a nested scope variable, then manipulates Foo.x as well, for example? More importantly, what would that mean for subclasses of Foo? Python has to treat a class scope differently as it is very different from a function scope.
Last, but definitely not least, the linke...
JavaScript function order: why does it matter?
...re's some examples.
bar(); //This won't throw an error
function bar() {}
foo(); //This will throw an error
var foo = function() {}
bar();
function bar() {
foo(); //This will throw an error
}
var foo = function() {}
bar();
function bar() {
foo(); //This _won't_ throw an error
}
func...
Understanding repr( ) function in Python
...
>>> x = 'foo'
>>> x
'foo'
So the name x is attached to 'foo' string. When you call for example repr(x) the interpreter puts 'foo' instead of x and then calls repr('foo').
>>> repr(x)
"'foo'"
>>> x.__repr_...
How are virtual functions and vtable implemented?
...
I agree that it would be foolish for any compiler that takes itself seriously to use a vtable when no virtual functions exist. However, I felt it important to point out that, to my knowledge, the C++ standard does not /require/ it, so be warned befor...