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Why is #!/usr/bin/env bash superior to #!/bin/bash?
...hes PATH for bash, and bash is not always in /bin, particularly on non-Linum>x m> systems. For em>x m>ample, on my OpenBSD system, it's in /usr/local/bin, since it was installed as an optional package.
If you are absolutely sure bash is in /bin and will always be, there's no harm in putting it directly in y...
How do I list loaded plugins in Vim?
...imilar Vim commands, is that they display information in a large slab of tem>x m>t, which is very hard to visually parse.
To get around this, I wrote Headlights, a plugin that adds a menu to Vim showing all loaded plugins, Tem>x m>tMate style. The added benefit is that it shows plugin commands, mappings, fil...
jQuery: Difference between position() and offset()
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Whether they're the same depends on contem>x m>t.
position returns a {left: m>x m>, top: y} object relative to the offset parent
offset returns a {left: m>x m>, top: y} object relative to the document.
Obviously, if the document is the offset parent, which is often the case,...
Find first element by predicate
...ek(num -> System.out.println("will filter " + num))
.filter(m>x m> -> m>x m> > 5)
.findFirst()
.get();
System.out.println(a);
Which outputs:
will filter 1
will filter 10
10
You see that only the two first elements of the stream are actually processed.
So you ...
Importing from a relative path in Python
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EDIT Nov 2014 (3 years later):
Python 2.6 and 3.m>x m> supports proper relative imports, where you can avoid doing anything hacky. With this method, you know you are getting a relative import rather than an absolute import. The '..' means, go to the directory above me:
from ...
Convert a string to int using sql query
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How do I catch/prevent the em>x m>ception when one of the fields is non-numeric? I would have em>x m>pected it to convert to 0.
– Chloe
Jun 13 '13 at 17:47
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Why should I prefer single 'await Task.WhenAll' over multiple awaits?
... (faulted or canceled tasks). Awaiting manually in sequence would cause unem>x m>pected concurrency because the part of your program that wants to wait will actually continue early.
I think it also makes reading the code easier because the semantics that you want are directly documented in code.
...
Standard deviation of a list
...n and standard deviation of 1st, 2nd,... digits of several (Z) lists. For em>x m>ample, I have
8 Answers
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Circular (or cyclic) imports in Python
...raightforward really. Just remember the following:
'import' and 'from m>x m>m>x m>m>x m> import yyy' are em>x m>ecutable statements. They em>x m>ecute
when the running program reaches that line.
If a module is not in sys.modules, then an import creates the new module
entry in sys.modules and then em>x m>ecutes the ...
Using python's eval() vs. ast.literal_eval()?
...tion is called. See also the dangers of eval.
ast.literal_eval raises an em>x m>ception if the input isn't a valid Python datatype, so the code won't be em>x m>ecuted if it's not.
Use ast.literal_eval whenever you need eval. You shouldn't usually evaluate literal Python statements.
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