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How do you use the ellipsis slicing syntax in Python?
...t; from numpy import arange
>>> a = arange(16).reshape(2,2,2,2)
Now, you have a 4-dimensional matrix of order 2x2x2x2. To select all first elements in the 4th dimension, you can use the ellipsis notation
>>> a[..., 0].flatten()
array([ 0, 2, 4, 6, 8, 10, 12, 14])
which is ...
How to search a specific value in all tables (PostgreSQL)?
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@Henno: yes it requires PG-9.1. Edited now to make that explicit. To use it with older versions, you'll have to adapt it.
– Daniel Vérité
May 11 '14 at 12:27
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Create the perfect JPA entity [closed]
I've been working with JPA (implementation Hibernate) for some time now and each time I need to create entities I find myself struggling with issues as AccessType, immutable properties, equals/hashCode, ... .
So I decided to try and find out the general best practice for each issue and write this ...
What does HTTP/1.1 302 mean exactly?
...s to this question are based in such document, which is no longer relevant nowadays. Quoting Mark Nottingham who, at the time of writing, co-chairs the IETF HTTP and QUIC Working Groups:
Don’t use RFC2616. Delete it from your hard drives, bookmarks, and burn (or responsibly recycle) any copies...
Highlight a word with jQuery
... a good idea to copy the code here; the link points to the latest version (now :)).
– Lerin Sonberg
Jan 24 '15 at 9:56
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What is the difference between the states selected, checked and activated in Android?
I'd like to know what differs those states. I didn't find any webpage clarifying this.
3 Answers
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How can I get form data with JavaScript/jQuery?
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@BartvanHeukelom I know this is 4 years later, but .serializeArray() will return an array.
– TJ WealthEngine API Evangelist
Oct 30 '14 at 15:30
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Strange, unexpected behavior (disappearing/changing values) when using Hash default value, e.g. Hash
...ll is just the default value, which we’ve been mutating all this time so now contains our new values. Since << doesn’t assign to the hash (there can never be assignment in Ruby without an = present†), we’ve never put anything into our actual hash. Instead we have to use <<= (whic...
How do I create an Excel (.XLS and .XLSX) file in C# without installing Microsoft Office?
... (.xlsx files). There's also NPOI which works with both.
There are a few known bugs with each library as noted in the comments. In all, EPPlus seems to be the best choice as time goes on. It seems to be more actively updated and documented as well.
Also, as noted by @АртёмЦарионов bel...
C state-machine design [closed]
...o doubt there will be higher-level abstractions which may be more suitable nowadays but I suspect they'll all boil down to this same sort of structure.
And, as ldog states in a comment, you can avoid the globals altogether by passing a structure pointer to all functions (and using that in the ev...