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How to round a number to significant figures in Python
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146
You can use negative numbers to round integers:
>>> round(1234, -3)
1000.0
Thus if...
Small Haskell program compiled with GHC into huge binary
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215
Let's see what's going on, try
$ du -hs A
13M A
$ file A
A: ELF 64-bit LSB executa...
Why is it slower to iterate over a small string than a small list?
... on a list of small single character strings. Any explanation? It's almost 1.35 times as much time.
3 Answers
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Find XOR of all numbers in a given range
...u are given a large range [a,b] where 'a' and 'b' can be typically between 1 and 4,000,000,000 inclusive. You have to find out the XOR of all the numbers in the given range.
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Is this a “good enough” random algorithm; why isn't it used if it's faster?
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14 Answers
14
Active
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How do I get bit-by-bit data from an integer value in C?
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155
If you want the k-th bit of n, then do
(n & ( 1 << k )) >> k
Here we creat...
How to host a Node.Js application in shared hosting [closed]
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160
You can run node.js server on a typical shared hosting with Linux, Apache and PHP (LAMP). I h...
Why `null >= 0 && null
I had to write a routine that increments the value of a variable by 1 if its type is number and assigns 0 to the variable if not, where the variable is initially null or undefined .
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What is a good regular expression to match a URL? [duplicate]
...ure URL starts with HTTP/HTTPS:
https?:\/\/(www\.)?[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_\+.~#?&//=]*)
If you do not require HTTP protocol:
[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_\+.~#?&//=]*)
To try this out see http://regex...