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Algorithm to return all combinations of k elements from n
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64
Lets say your array of letters looks like this: "ABCDEFGH". You have three indices (i, j, k) in...
Create list of single item repeated N times
...ols.repeat(0, 10)', 'import itertools', number = 1000000)
0.37095273281943264
>>> timeit.timeit('[0] * 10', 'import itertools', number = 1000000)
0.5577236771712819
But wait - it's not a fair test...
>>> itertools.repeat(0, 10)
repeat(0, 10) # Not a list!!!
The function itert...
How to properly import a selfsigned certificate into Java keystore that is available to all Java app
...00% sure you know which JRE or JDK is being used to run your program. On a 64 bit Windows 7 there could be quite a few JREs. Process Explorer can help you with this or you can use: System.out.println(System.getProperty("java.home"));
Copy the file JAVA_HOME\lib\security\cacerts to another folder.
In...
Interface vs Base class
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Interfaces
Defines the contract between 2 modules. Cannot have any implementation.
Most lan...
What is the meaning of polyfills in HTML5?
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First off let's clarify what a polyfil is not: A polyfill is not part of the HTML5 Standard. N...
Purpose of Unions in C and C++
...eader files that do this exact thing. For example I've seen it in old (pre-64-bit) versions of <time.h> on both Windows and Unix. Dismissing it as "not valid" and "undefined" isn't really sufficient if I'm going to be called upon to understand code that works in this exact way.
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Error - trustAnchors parameter must be non-empty
...4-17
OpenJDK Runtime Environment (build 10.0.1+10-Ubuntu-3ubuntu1)
OpenJDK 64-Bit Server VM (build 10.0.1+10-Ubuntu-3ubuntu1, mixed mode)
There are alternative workarounds as well, but those have their own side effects which will require extra future maintenance, for no payoff whatsoever.
The n...
What is a reasonable order of Java modifiers (abstract, final, public, static, etc.)?
... : private
4 : protected
8 : static
16 : final
32 : synchronized
64 : volatile
128 : transient
256 : native
512 : interface
1024 : abstract
2048 : strictfp
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How can I connect to Android with ADB over TCP? [closed]
...lty connecting to the device via USB. My development server is a Windows 7 64-bit VM running in Hyper-V , and so I cannot connect directly via USB in the guest or from the host.
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How do I determine whether my calculation of pi is accurate?
...'ve pulled this snippet from my blog:
N = # of decimal digits desired
p = 64-bit prime number
Compute A using base 10 arithmetic and B using binary arithmetic.
If A = B, then with "extremely high probability", the conversion is correct.
For further reading, see my blog post Pi - 5 Trillio...