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Check if key exists and iterate the JSON array using Python
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Why do this explicit in checks and raise if they're missing? Just access it without checking, and you'll get exactly the same behavior (except with a KeyError instead of a ValueError).
– abarnert
Jul 22 '14 at 22:43
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'git branch -av' showing remote branch that no longer exists
This is probably a dumb question, but I'm brand new to git and am seeing a remote branch that no longer exists.
3 Answers
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Handling very large numbers in Python
I've been considering fast poker hand evaluation in Python. It occurred to me that one way to speed the process up would be to represent all the card faces and suits as prime numbers and multiply them together to represent the hands. To whit:
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Ruby replace string with captured regex pattern
...ijwani Good comment, but also note that when using Ruby inline (on the command line with -e), it is more likely to see double quotes: printf "Punkinhead the name" | ruby -ne 'puts gsub /.*(the name)/, "Jonathans \\1"' because expression provided to -e is usually wrapped in single quotes.
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Static fields on a null reference in Java
...ase, Primary = main.getNull():
The Primary expression is evaluated, and the result is discarded. [...]
If the field is a non-blank final field, then the result is the value of the specified class variable in the class or interface that is the type of the Primary expression. [...]
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Why does Java's Arrays.sort method use two different sorting algorithms for different types?
Java 6's Arrays.sort method uses Quicksort for arrays of primitives and merge sort for arrays of objects. I believe that most of time Quicksort is faster than merge sort and costs less memory. My experiments support that, although both algorithms are O(n log(n)). So why are different algorithms us...
Is there a way to word-wrap long words in a div?
...rd-wrap: break-word; /* IE */
}
I've used this class for a bit now, and works like a charm. (note: I've only tested in FireFox and IE)
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Suppress echo of command invocation in makefile?
...le which when invoked as make run > outputFile should run the program and write the output to a file, which has a SHA1 fingerprint identical to the one given in the spec.
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How do I escape reserved words used as column names? MySQL/Create Table
I am generating tables from classes in .NET and one problem is a class may have a field name key which is a reserved MySQL keyword. How do I escape it in a create table statement? (Note: The other problem below is text must be a fixed size to be indexed/unique)
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What exactly do the Vagrant commands do?
There is surprisingly no documentation on what the Vagrant commands do, other than references throughout the "getting started" tutorial.
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