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What does the “yield” keyword do?
...for various things like controlling access to a resource.
Itertools, your best friend
The itertools module contains special functions to manipulate iterables. Ever wish to duplicate a generator?
Chain two generators? Group values in a nested list with a one-liner? Map / Zip without creating anothe...
How to map and remove nil values in Ruby
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Definitely compact is the best approach for solving this task. However, we can achieve the same result just with a simple subtraction:
[1, nil, 3, nil, nil] - [nil]
=> [1, 3]
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Search and replace in Vim across all the project files
I'm looking for the best way to do search-and-replace (with confirmation) across all project files in Vim. By "project files" I mean files in the current directory, some of which do not have to be open.
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Why are joins bad when considering scalability?
...ary indexes without even doing any in-depth data analysis to determine the best mix for leftmost prefix matching.
– Duncan
Apr 12 '10 at 22:12
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Replace all elements of Python NumPy Array that are greater than some value
...: A = np.random.rand(500, 500)
In [3]: timeit A[A > 0.5] = 5
100 loops, best of 3: 7.59 ms per loop
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CSS center display inline block?
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Great article i found what worked best for me was to add a % to the size
.wrap {
margin-top:5%;
margin-bottom:5%;
height:100%;
display:block;}
Is it a good practice to use try-except-else in Python?
...the principle that if our code fails, we want it to fail loudly. This is a best practice.
It is my understanding that exceptions are not errors
In Python, most exceptions are errors.
We can view the exception hierarchy by using pydoc. For example, in Python 2:
$ python -m pydoc exceptions
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Memcached vs. Redis? [closed]
...tures your pub/sub workloads likely need, Redis will often prove to be the best and most simple tool for the job.
Lua Scripting
You can kind of think of lua scripts like redis's own SQL or stored procedures. It's both more and less than that, but the analogy mostly works.
Maybe you have complex calc...
What does FrameLayout do?
...ity attribute.
http://blog.neteril.org/blog/2013/10/10/framelayout-your-best-ui-friend/
The secret of FrameLayout is how it layouts its children. Although normally designed to contain one
item, it will happily stack up other element on top of each other.
Thus FrameLayout is essentially ...
td widths, not working?
... are not standard anymore; as Ianzz says, they are deprecated. Instead the best way to do this is to have a block element inside your table cell that will hold the cell open to your desired size:
<table>
<tr>
<td valign="top">
<div class="left_menu">
...