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JsonMappingException: out of START_ARRAY token
Given the following .json file:
4 Answers
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Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviations with _mm_popcnt_
I was looking for the fastest way to popcount large arrays of data. I encountered a very weird effect: Changing the loop variable from unsigned to uint64_t made the performance drop by 50% on my PC.
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How to exclude a directory in find . command
I'm trying to run a find command for all JavaScript files, but how do I exclude a specific directory?
38 Answers
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How would you count occurrences of a string (actually a char) within a string?
I am doing something where I realised I wanted to count how many / s I could find in a string, and then it struck me, that there were several ways to do it, but couldn't decide on what the best (or easiest) was.
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Best Practices: working with long, multiline strings in PHP?
Note: I'm sorry if this is an extremely simple question but I'm somewhat obsessive compulsive over the formatting of my code.
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Why Collections.sort uses merge sort instead of quicksort?
We know that quick sort is the fastest sorting algorithm.
1 Answer
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How do you rotate a two dimensional array?
Inspired by Raymond Chen's post , say you have a 4x4 two dimensional array, write a function that rotates it 90 degrees. Raymond links to a solution in pseudo code, but I'd like to see some real world stuff.
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What are the applications of binary trees?
I am wondering what the particular applications of binary trees are. Could you give some real examples?
17 Answers
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Create list of single item repeated N times
I want to create a series of lists, all of varying lengths. Each list will contain the same element e , repeated n times (where n = length of the list).
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Append an object to a list in R in amortized constant time, O(1)?
If I have some R list mylist , you can append an item obj to it like so:
17 Answers
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