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Show pending migrations in rails
Is there a rake task that shows the pending migrations in a rails app?
10 Answers
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How to automatically remove trailing whitespace in Visual Studio 2008?
...dio 2008 to automatically remove whitespace characters at the end of each line when saving a file? There doesn't seem to be a built-in option, so are there any extensions available to do this?
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How do I create a category in Xcode 6 or higher?
I want to create a category on UIColor in my app using Xcode 6. But the thing is that in Xcode 6 there is no Objective-C category file template.
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How to format a number as percentage in R?
One of the things that used to perplex me as a newby to R was how to format a number as a percentage for printing.
10 Answe...
Simplest way to read json from a URL in java
... question but what is the simplest way to read and parse JSON from URL in Java ?
11 Answers
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Fastest way to tell if two files have the same contents in Unix/Linux?
I have a shell script in which I need to check whether two files contain the same data or not. I do this a for a lot of files, and in my script the diff command seems to be the performance bottleneck.
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How to count the number of true elements in a NumPy bool array
...number of elements whose values are True . Is there a NumPy or Python routine dedicated for this task? Or, do I need to iterate over the elements in my script?
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enum.values() - is an order of returned enums deterministic
...guage specification uses this explicit language:
@return an array containing the constants of this enum type, in the order they're declared [Source]
So, yes, they will be returned in declaration order. It's worth noting that the order might change over time if someone changes the class so be v...
How does password salt help against a rainbow table attack?
I'm having some trouble understanding the purpose of a salt to a password. It's my understanding that the primary use is to hamper a rainbow table attack. However, the methods I've seen to implement this don't seem to really make the problem harder.
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How do I copy an object in Java?
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Create a copy constructor:
class DummyBean {
private String dummy;
public DummyBean(DummyBean another) {
this.dummy = another.dummy; // you can access
}
}
Every object has also a clone method which can be used to copy the object, but don't use it. It's way too easy to...