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Why does direction of index matter in MongoDB?
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How to get first element in a list of tuples?
I have a list like below where the first element is the id and the other is a string:
12 Answers
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Real-world examples of recursion [closed]
What are real-world problems where a recursive approach is the natural solution besides depth-first search (DFS)?
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Remove duplicate dict in list in Python
I have a list of dicts, and I'd like to remove the dicts with identical key and value pairs.
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What does 'predicate' mean in the context of computer science? [duplicate]
Specifically I've seen it used in the context of text filtering. As if "predicate" == "filter criteria".
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400 BAD request HTTP error code meaning?
I have a JSON request which I'm posting to a HTTP URL.
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Apply a function to every row of a matrix or a data frame
Suppose I have a n by 2 matrix and a function that takes a 2-vector as one of its arguments. I would like to apply the function to each row of the matrix and get a n-vector. How to do this in R?
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Checking if a key exists in a JavaScript object?
How do I check if a particular key exists in a JavaScript object or array?
22 Answers
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Why is a ConcurrentModificationException thrown and how to debug it
I am using a Collection (a HashMap used indirectly by the JPA, it so happens), but apparently randomly the code throws a ConcurrentModificationException . What is causing it and how do I fix this problem? By using some synchronization, perhaps?
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Should I hash the password before sending it to the server side?
I noticed that most sites send the passwords as plain text over HTTPS to the server. Is there any advantage if instead of that I sent the hash of the password to the server? Would it be more secure?
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