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When to use RSpec let()?
...at finger the spelling of the instance variable, a new one will be created and initialized to nil, which can lead to subtle bugs and false positives. Since let creates a method, you'll get a NameError when you misspell it, which I find preferable. It makes it easier to refactor specs, too.
A befor...
How to round up the result of integer division?
...ds + recordsPerPage - 1) / recordsPerPage;
Source: Number Conversion, Roland Backhouse, 2001
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Difference between application/x-javascript and text/javascript content types
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text/javascript is obsolete, and application/x-javascript was experimental (hence the x- prefix) for a transitional period until application/javascript could be standardised.
You should use application/javascript. This is documented in the RFC.
As far...
What's the difference between “Architectures” and “Valid Architectures” in Xcode Build Settings?
What's the meaning of them and can I set them in different values?
2 Answers
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Printing HashMap In Java
...y returns a set of keys from your hashmap, you should iterate this key set and the get the value from the hashmap using these keys.
In your example, the type of the hashmap's key is TypeKey, but you specified TypeValue in your generic for-loop, so it cannot be compiled. You should change it to :
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What is meant by 'first class object'?
...them
in data structures, passing them as
arguments to other functions, and
returning them as the values of other
functions.
This page also illustrates it beautifully:
Really, just like any other variable
A function is an instance of the Object type
A function can have properties and...
Can a shell script set environment variables of the calling shell? [duplicate]
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Your shell process has a copy of the parent's environment and no access to the parent process's environment whatsoever. When your shell process terminates any changes you've made to its environment are lost. Sourcing a script file is the most commonly used method for configuring a s...
cartesian product in pandas
I have two pandas dataframes:
11 Answers
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How do I generate random integers within a specific range in Java?
How do I generate a random int value in a specific range?
66 Answers
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Ruby - test for array
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There's also is_a? and instance_of?. See stackoverflow.com/questions/3893278/…
– Nathan Long
Mar 21 '11 at 15:57
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