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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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Java Hashmap: How to get key from value?
If I have the value "foo" , and a HashMap<String> ftw for which ftw.containsValue("foo") returns true , how can I get the corresponding key? Do I have to loop through the hashmap? What is the best way to do that?
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Converting an object to a string
How can I convert a JavaScript object into a string?
36 Answers
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How to get overall CPU usage (e.g. 57%) on Linux [closed]
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Undefined reference to `sin` [duplicate]
I have the following code (stripped down to the bare basics for this question):
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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
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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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How to move screen without moving cursor in Vim?
I recently discovered Ctrl + E and Ctrl + Y shortcuts for Vim that respectively move the screen up and down with a one line step, without moving the cursor .
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How to make a class JSON serializable
How to make a Python class serializable?
33 Answers
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Can we convert a byte array into an InputStream in Java?
Can we convert a byte array into an InputStream in Java? I have been looking on the internet but couldn't find it.
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