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How to get a specific output iterating a hash in Ruby?
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Regarding order I should add, that in 1.8 the items will be iterated in random order (well, actually in an order defined by Fixnum's hashing function), while in 1.9 it will be iterated in the order of the literal.
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Determine if a String is an Integer in Java [duplicate]
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The most naive way would be to iterate over the String and make sure all the elements are valid digits for the given radix. This is about as efficient as it could possibly get, since you must look at each element at least once. I suppose we could micro-optimize it based on the ra...
How do I automatically sort a has_many relationship in Rails?
...ill change wildly depending on how you're fetching data in the first place and which Ruby you're using to run your app.
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Undo scaffolding in Rails
Is there any way to 'undo' the effects of a scaffold command in Rails?
24 Answers
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@import vs #import - iOS 7
I am playing around with some of the new iOS 7 features and working with some of the Image Effects as discussed in the WWDC video "Implementing Engaging UI on iOS". For producing a blur effect within the source code for the session, UIImage was extended via a category which imports UIKit like so:
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Delete from the current cursor position to a given line number in vi editor
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To delete from a to b use
:a,bd
from current to b use
:,bd
(where a and b in code are replaced by your numbers)
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Django template how to look up a dictionary value with a variable
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Fetch both the key and the value from the dictionary in the loop:
{% for key, value in mydict.items %}
{{ value }}
{% endfor %}
I find this easier to read and it avoids the need for special coding. I usually need the key and the value in...
How do you explicitly set a new property on `window` in TypeScript?
...ate .d.ts file. It does not work when used in a .ts file that uses imports and exports itself. See this answer.
– cdauth
Mar 9 '16 at 14:21
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:: (double colon) operator in Java 8
I was exploring the Java 8 source and found this particular part of code very surprising:
17 Answers
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Convert Bitmap to File
I understand that using BitmapFactory can convert a File to a Bitmap, but is there any way to convert a Bitmap image to a File?
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