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Is recursion ever faster than looping?
...ou wrote 'language-agnostic', so I'll give some examples.
In Java, C, and Python, recursion is fairly expensive compared to iteration (in general) because it requires the allocation of a new stack frame. In some C compilers, one can use a compiler flag to eliminate this overhead, which transforms ...
What is “callback hell” and how and why does RX solve it?
...ions can vary and include: async, generators, coroutines, and callcc.
In Python we can implement that previous loop example with something along the lines of:
def myLoop():
for i in range(10):
doSomething(i)
yield
myGen = myLoop()
This is not the full code but the idea is t...
Loop through an array in JavaScript
...tional programming technique that's also available in other languages like Python and Haskell.
[1,2,3,4].map( function(item) {
alert(item);
})
The general syntax is:
array.map(func)
In general func would take one parameter, which is an item of the array. But in the case of JavaScript, it ...
Why should I use core.autocrlf=true in Git?
...r "strong recommendation" will cause problems. Try running a bash, perl or python script with the shebang ending with \r\n and you'll see.
– phuclv
Nov 16 '16 at 9:38
6
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What is the difference between native code, machine code and assembly code?
...ow.
Strictly speaking, most dynamically-typed languages — such as Perl, Python, PHP and Ruby — are also managed code. However, they are not commonly described as such, which shows that managed code is actually somewhat of a marketing term for the really big, serious, commercial programming envi...
Why do people use Heroku when AWS is present? What distinguishes Heroku from AWS? [closed]
...have a PaaS offering, Elastic Beanstalk, that supports Ruby, Node.js, PHP, Python, .NET and Java. I think generally most people, when they see "AWS", jump to things like EC2 and S3 and EBS, which are definitely IaaS offerings
...
Difference between timestamps with/without time zone in PostgreSQL
...
i'm working with python, and thats what gets inserted when insert a timestamp aware datettime object. It seems to me there is value in using timestamp with time zone, but its not necessary to handle timezones.
– pk1m
...
How to validate an email address using a regular expression?
...ex library used e.g. in PHP) can correctly parse RFC 5322 without a hitch. Python and C# can do that too, but they use a different syntax from those first two. However, if you are forced to use one of the many less powerful pattern-matching languages, then it’s best to use a real parser.
It's als...
Regular expressions in C: examples?
...ssions in C. The Perl syntax is pretty much that same syntax used in Java, Python, and a number of other languages. The POSIX syntax is the syntax used by grep, sed, vi, etc.
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Quickly find whether a value is present in a C array?
... much faster than a linear search of 256 or 1024 values.
I've written some Python code to find reasonable hash functions.
Binary search
If you sort your array of 256 "valid" values, then you can do a binary search, rather than a linear search. That means you should be able to search 256-entry table ...