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How can I tell if I'm running in 64-bit JVM or 32-bit JVM (from within a program)?
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This is a string intended for human eyes and without a strict definition of valid values, relying on this is not a good idea - write code that checks actual functionality instead.
– Thorbjørn Ravn Andersen
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Row count with PDO
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Using this approach, fetchColumn() returns a string "1234" ... your EDIT has echo count($nRows); - count() is an array function :P. I'd also recommend type casting the result from fetchColumn() to an integer. $count = (int) $stmt->fetchColumn()
–...
How can I repeat a character in Bash?
...e me notice a behaviour of Bash's printf: it continues to apply the format string until there are no arguments left. I had assumed it processed the format string only once!
– Jeenu
Jan 8 '15 at 10:25
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Method Syntax in Objective-C
...ersonData) for setting some information about person:
void setPersonData( char* name, int age, float height ) {
and in Objective-C the method would be more descriptive (setPersonName:andAge:andHeight:), like
- (void) setPersonName: (char *)name andAge:(int)age andHeight:(float)height {
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How do I check OS with a preprocessor directive?
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#endif
// Return a name of platform, if determined, otherwise - an empty string
const char *get_platform_name() {
return (PLATFORM_NAME == NULL) ? "" : PLATFORM_NAME;
}
int main(int argc, char *argv[]) {
puts(get_platform_name());
return 0;
}
Tested with GCC and clang on:
Debian 8...
Getting a list of files in a directory with a glob
...u can achieve this pretty easily with the help of NSPredicate, like so:
NSString *bundleRoot = [[NSBundle mainBundle] bundlePath];
NSFileManager *fm = [NSFileManager defaultManager];
NSArray *dirContents = [fm contentsOfDirectoryAtPath:bundleRoot error:nil];
NSPredicate *fltr = [NSPredicate predica...
What is the difference between cout, cerr, clog of iostream header in c++? When to use which one?
... happen.
#include <iostream>
#include <fstream>
#include <string>
void f(std::ostream &os)
{
std::cin.clear(); // clear EOF flags
std::cin.seekg(0, std::cin.beg); // seek to begin
std::string line;
while(std::getline(std::cin, line)) //input from the file ...
How to disable GCC warnings for a few lines of code
...ing puts.c source code
#include <stdio.h>
int main(int argc, const char *argv[])
{
while (*++argv) puts(*argv);
return 0;
}
It will not compile because argc is unused, and the settings are hardcore (-W -Wall -pedantic -Werror).
There are 5 things you could do:
Improve the source...
Concatenate multiple result rows of one column into one, group by another column [duplicate]
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Simpler with the aggregate function string_agg() (Postgres 9.0 or later):
SELECT movie, string_agg(actor, ', ') AS actor_list
FROM tbl
GROUP BY 1;
The 1 in GROUP BY 1 is a positional reference and a shortcut for GROUP BY movie in this case.
string_agg() ...
How to comment out a block of Python code in Vim
...' at first column with ''. <cr>:noh<cr> just clears the search string so nothing is left highlighted when you are done.
– cdated
Sep 22 '16 at 16:06
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