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MPICH vs OpenMPI
Can someone elaborate the differences between the OpenMPI and MPICH implementations of MPI ?
Which of the two is a better implementation ?
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Evaluating a mathematical expression in a string
...ppend(toks[0])
def pushUMinus(self, strg, loc, toks):
if toks and toks[0] == '-':
self.exprStack.append('unary -')
def __init__(self):
"""
expop :: '^'
multop :: '*' | '/'
addop :: '+' | '-'
integer :: ['+' | '-'] '0'..'9'+
...
How to construct a relative path in Java from two absolute paths (or URLs)?
...java.nio.file.Path#relativize(Path), it just works with parent double-dots and all.
– Campa
Feb 12 '16 at 9:40
Conside...
In C, how should I read a text file and print all strings
...
The simplest way is to read a character, and print it right after reading:
int c;
FILE *file;
file = fopen("test.txt", "r");
if (file) {
while ((c = getc(file)) != EOF)
putchar(c);
fclose(file);
}
c is int above, since EOF is a negative number, an...
Why is “origin/HEAD” shown when running “git branch -r”?
...r example, there's a remote repo on GitHub, say, with two branches: master and awesome-feature. If I do git clone to grab it and then go into my new directory and list the branches, I see this:
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What is the purpose of XORing a register with itself? [duplicate]
...t is more efficient.
The opcode is shorter than mov eax, 0, only 2 bytes, and the processor recognizes the special case and treats it as a mov eax, 0 without a false read dependency on eax, so the execution time is the same.
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How do I include a pipe | in my linux find -exec command?
...f interpreting the pipe symbol as an instruction to run multiple processes and pipe the output of one process into the input of another process is the responsibility of the shell (/bin/sh or equivalent).
In your example you can either choose to use your top level shell to perform the piping like s...
Fragment or Support Fragment?
I am developing an app that supports Android >= 4.0. It uses fragments from the android.app package. As I am facing problems with the older fragment implementation in 4.0, like this one , that are already fixed in the support library, I am considering switching back to the fragment implementation...
AddBusinessDays and GetBusinessDays
... For the second one, one solution is to take the difference between date and date+days. This is nice in that it guarantees that the two functions will sync properly, and it removes redundancy.
– Brian
Jun 25 '09 at 16:20
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How to suppress warnings globally in an R Script
...but the approach of Francesco Napolitano from Sept. 22, 2015, is the safer and more globally-applicable method.
– Andy Clifton
Oct 23 '15 at 18:13
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