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Why does Clojure have “keywords” in addition to “symbols”?
...vide very fast equality tests...
Symbols are identifiers that are normally used to refer to something else. They can be used in program forms to refer to function parameters, let bindings, class names and global vars...
Keywords are generally used as lightweight "constant strings", e.g. for t...
A definitive guide to API-breaking changes in .NET
... information as possible regarding API versioning in .NET/CLR, and specifically how API changes do or do not break client applications. First, let's define some terms:
...
Does Java support default parameter values?
...berson: Static factory methods are no more harmful than new. They are used all the time in new code. Builders for simple value objects are often the result of over-engineering.
– Lii
Jan 22 '16 at 8:38
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What's the easiest way to escape HTML in Python?
...
< to &lt;
> to &gt;
& to &amp;
That is enough for all HTML.
EDIT: If you have non-ascii chars you also want to escape, for inclusion in another encoded document that uses a different encoding, like Craig says, just use:
data.encode('ascii', 'xmlcharrefreplace')
Don't for...
Getting an element from a Set
...as already been added to the Set? For example, when .equals() does not use all of the fields, as the OP specified. A less efficient solution would be to remove the element and re-add it with its values updated.
– KyleM
Feb 19 '13 at 17:48
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uppercase first character in a variable with bash
... Despite being more complex than the best scored answer, this one actually does exactly that: 'uppercase first character in a variable'. Best scored answer does not have that results. Looks like simple answers are upvoted more willingly than the correct ones?
– Krzysztof J...
Self-references in object literals / initializers
...some kind of one time initialization of the object.
Note that you are actually assigning the return value of init() to foo, therefore you have to return this.
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How to check if a string contains a substring in Bash
...you can get a similar effect with a case statement:
case "$string" in
*foo*)
# Do stuff
;;
esac
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Django - How to rename a model field using South?
... # Rename 'name' field to 'full_name'
db.rename_column('app_foo', 'name', 'full_name')
def backwards(self, orm):
# Rename 'full_name' field to 'name'
db.rename_column('app_foo', 'full_name', 'name')
The first argument of db.rename_column is the table name, so...
How can I call a custom Django manage.py command directly from a test driver?
...ts.
But if you by some reason cannot decouple logic form command you can call it from any code using call_command method like this:
from django.core.management import call_command
call_command('my_command', 'foo', bar='baz')
...