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How can I use a file in a command and redirect output to the same file without truncating it?
Basically I want to take as input text from a file, remove a line from that file, and send the output back to the same file. Something along these lines if that makes it any clearer.
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Picking a random element from a set
How do I pick a random element from a set?
I'm particularly interested in picking a random element from a
HashSet or a LinkedHashSet, in Java.
Solutions for other languages are also welcome.
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Calling remove in foreach loop in Java [duplicate]
In Java, is it legal to call remove on a collection when iterating through the collection using a foreach loop? For instance:
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What is more efficient: Dictionary TryGetValue or ContainsKey+Item?
From MSDN's entry on Dictionary.TryGetValue Method :
10 Answers
10
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Converting an object to a string
How can I convert a JavaScript object into a string?
36 Answers
36
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grep output to show only matching file
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cannot find zip-align when publishing app
This is the message I received when I tried to publish my app. I'm using the latest revision of Android SDK Tools (23 which was released today) and SDK Platform-tools (20 which was also released today). I got an APK out of it, but if I tried to upload it to Google Play I got an error complaining tha...
Undefined reference to `sin` [duplicate]
I have the following code (stripped down to the bare basics for this question):
4 Answers
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Which is more efficient, a for-each loop, or an iterator?
Which is the most efficient way to traverse a collection?
7 Answers
7
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How to make an immutable object in Python?
Although I have never needed this, it just struck me that making an immutable object in Python could be slightly tricky. You can't just override __setattr__ , because then you can't even set attributes in the __init__ . Subclassing a tuple is a trick that works:
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