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Find when a file was deleted in Git
... Git repository in /home/mark/example/.git/
mark@lunchbox:~/example$ touch foo && git add foo && git commit -m "Added foo"
[master (root-commit) ddff7a7] Added foo
1 file changed, 0 insertions(+), 0 deletions(-)
create mode 100644 foo
mark@lunchbox:~/example$ git checkout -b newbra...
Circular (or cyclic) imports in Python
...
If you do import foo (inside bar.py) and import bar (inside foo.py), it will work fine. By the time anything actually runs, both modules will be fully loaded and will have references to each other.
The problem is when instead you do from foo ...
List changes unexpectedly after assignment. How do I clone or copy it to prevent this?
...-needing method, but sometimes unavoidable.
Example:
import copy
class Foo(object):
def __init__(self, val):
self.val = val
def __repr__(self):
return 'Foo({!r})'.format(self.val)
foo = Foo(1)
a = ['foo', foo]
b = a.copy()
c = a[:]
d = list(a)
e = copy.copy(a)
f = cop...
What does a lazy val do?
...pendent or cyclic structures. E.g. this leads to an stack overflow:
trait Foo { val foo: Foo }
case class Fee extends Foo { val foo = Faa() }
case class Faa extends Foo { val foo = Fee() }
println(Fee().foo)
//StackOverflowException
But with lazy vals it works fine
trait Foo { val foo: Foo }
ca...
How to escape braces (curly brackets) in a format string in .NET
...
For you to output foo {1, 2, 3} you have to do something like:
string t = "1, 2, 3";
string v = String.Format(" foo {{{0}}}", t);
To output a { you use {{ and to output a } you use }}.
or Now, you can also use c# string interpolation like ...
Common programming mistakes for Clojure developers to avoid [closed]
...urn literals in an anonymous function literal
This works:
user> (defn foo [key val]
{key val})
#'user/foo
user> (foo :a 1)
{:a 1}
so I believed this would also work:
(#({%1 %2}) :a 1)
but it fails with:
java.lang.IllegalArgumentException: Wrong number of args passed to: PersistentA...
How to delete duplicates on a MySQL table?
...
Doesn't seem to work with InnoDB. I ran ALTER TABLE foo ENGINE MyISAM to work around it, changed the engine back after.
– Martin
Jul 17 '13 at 23:06
13
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How to call a parent class function from derived class function?
...uate it by adding the base class's name followed by two colons base_class::foo(...). You should note that unlike Java and C#, C++ does not have a keyword for "the base class" (super or base) since C++ supports multiple inheritance which may lead to ambiguity.
class left {
public:
void foo();
};...
Inserting a string into a list without getting split into characters
...
To add to the end of the list:
list.append('foo')
To insert at the beginning:
list.insert(0, 'foo')
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Kotlin: how to pass a function as parameter to another?
Given function foo :
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