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How do I mock an open used in a with statement (using the Mock framework in Python)?
... with patch('{}.open'.format(__name__), m, create=True):
... with open('foo', 'w') as h:
... h.write('some stuff')
>>> m.assert_called_once_with('foo', 'w')
>>> handle = m()
>>> handle.write.assert_called_once_with('some stuff')
...
When should an IllegalArgumentException be thrown?
... I think "reasonably expected to recover" is weaselly. Any operation foo(data) could have happened as part of for(Data data : list) foo(data); in which the caller could want as many to succeed as possible even though some data are malformed. Includes programmatic errors too, if my application...
What is the “assert” function?
...// GOOD
assert(x);
x++;
// Watch out! Depends on the function:
assert(foo());
// Here's a safer way:
int ret = foo();
assert(ret);
From the combination of the program calling abort() and not being guaranteed to do anything, asserts should only be used to test things that the developer has as...
Dynamic SQL - EXEC(@SQL) versus EXEC SP_EXECUTESQL(@SQL)
...
EXEC('SELECT * FROM FOO WHERE ID=?', 123) will replace the parameter placeholder "?" with the value 123 and then execute the query, returning a result for SELECT * FROM FOO WHERE ID=123
– Peter Wone
Jun 1 '...
Step-by-step debugging with IPython
... ipdb command takes precedence over python code. So in order to write list(foo) you'd need print list(foo).
Also, if you like the ipython prompt (its emacs and vim modes, history, completions,…) it's easy to get the same for your project since it's based on the python prompt toolkit.
...
Can you use an alias in the WHERE clause in mysql?
.... sum(reviews.rev_rating)/count(reviews.rev_id) as avg_rating
from ...) Foo
where Foo.avg_rating ...
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What does 'synchronized' mean?
... that are reading and writing to the same 'resource', say a variable named foo, you need to ensure that these threads access the variable in an atomic way. Without the synchronized keyword, your thread 1 may not see the change thread 2 made to foo, or worse, it may only be half changed. This would...
Javascript Functions and default parameters, not working in IE and Chrome
...ds on your situation. If you know the argument won't be falsey, you can do foo = foo || "the default". Or you can check the .length of the arguments object. Or you can simply test each parameter for undefined. There are different occasions to use each.
– the system
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Pass parameter to fabric task
...s to tasks:
fab task:'hello world'
fab task:something='hello'
fab task:foo=99,bar=True
fab task:foo,bar
You can read more about it in Fabric docs.
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Ways to save enums in database
...t to declare the same information in two places? Both in CODE public enum foo {bar} and CREATE TABLE foo (name varchar); that can easily get out of sync.
– ebyrob
Nov 11 '16 at 16:17
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