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What is the difference between encode/decode?
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The decode method of unicode strings really doesn't have any applications at all (unless you have some non-text data in a unicode string for some reason -- see below). It is mainly there for historical reasons, i think. In Python 3 it is completely gone.
unicode(...
How to get the difference between two arrays of objects in JavaScript
...ately. (Extra points if it were more efficient than having to run through all m * n comparisons twice!)
– Scott Sauyet
Feb 24 '14 at 12:55
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Table fixed header and scrollable body
...ad thead th { position: sticky; top: 0; }
/* Just common table stuff. Really. */
table { border-collapse: collapse; width: 100%; }
th, td { padding: 8px 16px; }
th { background:#eee; }
<div class="tableFixHead">
<table>
<thead>
<tr><th>TH 1<...
Why does the use of 'new' cause memory leaks?
...of type T with automatic storage duration. It will get cleaned up automatically when it goes out of scope.
When you write new T() you're creating an object of type T with dynamic storage duration. It won't get cleaned up automatically.
You need to pass a pointer to it to delete in order to clean...
Throwing cats out of windows
Imagine you're in a tall building with a cat. The cat can survive a fall out of a low story window, but will die if thrown from a high floor. How can you figure out the longest drop that the cat can survive, using the least number of attempts?
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Error “initializer element is not constant” when trying to initialize variable with const
...tatic pointer defined inside a function, this is error: static int* ptr = malloc(sizeof(int)*5); but this is NOT an error: static int* ptr; ptr = malloc(sizeof(int)*5); :D
– aderchox
Jan 5 '19 at 19:33
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What's the difference between a proc and a lambda in Ruby?
...ept the resulting Proc objects check the number of parameters passed when called.
An example:
p = Proc.new {|a, b| puts a**2+b**2 } # => #<Proc:0x3c7d28@(irb):1>
p.call 1, 2 # => 5
p.call 1 # => NoMethodError: undefined method `**' for nil:NilClass
p.call 1, 2, 3 # => 5
l = lamb...
What exactly is Java EE?
...lementation of the specification. The concrete implementations are the so-called application servers, like WildFly, TomEE, GlassFish, Liberty, WebLogic, etc. There are also servlet containers which implement only the JSP/Servlet part of the huge Java EE API, such as Tomcat, Jetty, etc.
We, Java EE d...
Parsing command-line arguments in C?
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Really thorough answer, thanks Christian (upvoted). However, mac users should be aware that the argp approach isn't cross-platform compatible. As I found here, Argp is a non-standardized glibc API extension. It is available i...
Storing JSON in database vs. having a new column for each key
...opularity, I figured it was worth an update.
When this question was originally posted, MySQL had no support for JSON data types and the support in PostgreSQL was in its infancy. Since 5.7, MySQL now supports a JSON data type (in a binary storage format), and PostgreSQL JSONB has matured significant...