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How do I search within an array of hashes by hash values in ruby?
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You're looking for Enumerable#select (also called find_all):
@fathers.select {|father| father["age"] > 35 }
# => [ { "age" => 40, "father" => "Bob" },
# { "age" => 50, "father" => "Batman" } ]
Per the documentation...
What's the difference between “Architectures” and “Valid Architectures” in Xcode Build Settings?
... building with your codebase.
So maybe you only want to build your binary for armv7s, but the same source code would compile fine for armv7 and armv6. So VALID_ARCHS = armv6 armv7 armv7s, but you set ARCHS = armv7s because that's all you actually want to build with your code.
Or, in Apple-ese:
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List distinct values in a vector in R
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Counting the Number of keywords in a dictionary in python
... way to count the number of keywords or is there another way I should look for distinct words?
5 Answers
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What is the difference between Collections.emptyList() and Collections.EMPTY_LIST
...rns an old-style List
Collections.emptyList() uses type-inference and therefore returns
List<T>
Collections.emptyList() was added in Java 1.5 and it is probably always preferable. This way, you don't need to unnecessarily cast around within your code.
Collections.emptyList() intrinsically d...
Right query to get the current number of connections in a PostgreSQL DB
... edited Jan 13 '14 at 1:34
informatik01
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answered Mar 11 '11 at 8:52
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How do I use Nant/Ant naming patterns?
I have to admit that I always forgot the syntactical intracacies of the naming patterns for Nant (eg. those used in filesets). The double asterisk/single asterisk stuff seems to be very forgettable in my mind.
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How to loop through all but the last item of a list?
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for x in y[:-1]
If y is a generator, then the above will not work.
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How to check if anonymous object has a method?
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Won't work if you are looking for a method that was defined in the prototype.
– Wilt
Jan 26 '16 at 13:19
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What is the maximum float in Python?
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For float have a look at sys.float_info:
>>> import sys
>>> sys.float_info
sys.floatinfo(max=1.7976931348623157e+308, max_exp=1024, max_10_exp=308, min=2.2
250738585072014e-308, min_exp=-1021, min_10_exp=-3...