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How do I raise the same Exception with a custom message in Python?
...resting. Do you have a reference on that? Then I would add to a completely new member: err.my_own_extra_info. Or encapsulate it all in my own exception keeping the new and the original information.
– Johan Lundberg
Nov 1 '13 at 8:20
...
Scoping in Python 'for' loops
...l:
# Sum the values 0..9?
total = 0
for foo in xrange(10):
# Create a new integer object with value "total + foo" and bind it to a new
# loop-local variable named "total".
total = total + foo
print total
yields 0, because total inside the loop after the assignment is not the same vari...
What is the difference between inversedBy and mappedBy?
...stly the Article that is responsible for this relation. Whenever you add a new article, you want to connect it with existing or new tags. Your create Article form will probably support this notion and allow to specify the tags directly. This is why you should pick the Article as owning side, as it m...
Symbolic link to a hook in git
... var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled...
Extending an Object in Javascript
....prototype.constructor = Robot; // Set constructor back to Robot
person = new Person("Bob");
robot = new Robot("Boutros");
person.info();
// Name: Bob Type: human
robot.info();
// Name: Boutros Type: robot
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Create Django model or update if exists
...ts.get_or_create(identifier=id)
if created:
# means you have created a new person
else:
# person just refers to the existing one
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Strange, unexpected behavior (disappearing/changing values) when using Hash default value, e.g. Hash
...ently mutated (e.g. hashes and strings), not just arrays.
TL;DR: Use Hash.new { |h, k| h[k] = [] } if you want the most idiomatic solution and don’t care why.
What doesn’t work
Why Hash.new([]) doesn’t work
Let’s look more in-depth at why Hash.new([]) doesn’t work:
h = Hash.new([])
...
How to center a Window in Java?
...
From this link
If you are using Java 1.4 or newer,
you can use the simple method
setLocationRelativeTo(null) on the
dialog box, frame, or window to center
it.
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How to replace case-insensitive literal substrings in Java
...other approaches but it's pretty solid and easy to follow, esp. for people newer to Java. One thing that gets me about the String class is this: It's been around for a very long time and while it supports a global replace with regexp and a global replace with Strings (via CharSequences), that last ...
How do I load a file into the python console?
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Python 3: new exec (execfile dropped) !
The execfile solution is valid only for Python 2. Python 3 dropped the execfile function - and promoted the exec statement to a builtin universal function. As the comment in Python 3.0's changel...