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How do you detect Credit card type based on number?
...PAN, or Primary Account Number. The first six digits of the PAN are taken from the IIN, or Issuer Identification Number, belonging to the issuing bank (IINs were previously known as BIN — Bank Identification Numbers — so you may see references to that terminology in some documents). These six ...
Guava equivalent for IOUtils.toString(InputStream)
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@ColinD, if the inputStream is coming from inside of a doPost servlet, is there any point in closing it? (or worrying about closing it)
– Blankman
Apr 22 '12 at 19:43
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Are list-comprehensions and functional functions faster than “for loops”?
...within a set of points, functional programming (using the starmap function from the built-in itertools module) turned out to be slightly slower than for-loops (taking 1.25 times as long, in fact). Here is the sample code I used:
import itertools, time, math, random
class Point:
def __init__(se...
Why do x86-64 systems have only a 48 bit virtual address space?
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Where does the 4 come from in the 4 petabytes? If we're talking 64 address lines we should end up with the square of the address space made possible by 32 address lines which is 4 gigabytes. Square that and we should have 16, not 4 petabytes. Am I...
OS X Bash, 'watch' command
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This watch from brew doesn't seem to read the user aliases. When executing watch somealias, I get a command not found.
– RNickMcCandless
Mar 31 '16 at 19:21
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What is a patch in git version control?
...ntrol so I am trying to figure out what a patch is and how is it different from the rest of activities I do in git?
5 Answe...
What is the $$hashKey added to my JSON.stringify result
... also use the One Time Binding feature using double colon :: to prevent it from updating if you are only displaying data. <a ng-href="link.href">{{::link.title}}</a>
– phil
Mar 15 '17 at 5:07
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Efficiency of Java “Double Brace Initialization”?
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@Jim Ferrans: I'm fairly certain that the Test1 times are from class loads. But, the consequence of using double brace initialization is having to cope from class loads. I believe most use cases for double brace init. is for one-time initialization, the test is closer in conditions ...
Why no generics in Go?
...ow compilers are caused by C++ like generics and slow execution times stem from the boxing-unboxing approach that Java uses.
The fourth possibility not mentioned in the blog is going the C# route. Generating the specialized code like in C++, but at runtime when it is needed. I really like it, but G...
How to read a file in reverse order?
How to read a file in reverse order using python? I want to read a file from last line to first line.
21 Answers
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