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How to allocate aligned memory only using the standard library?
...specialized things, like playing with graphics systems, they can need more stringent alignment than the rest of the system — hence questions and answers like this.)
The next step is to convert the void pointer to a char pointer; GCC notwithstanding, you are not supposed to do pointer arithmetic o...
How can I strip all punctuation from a string in JavaScript using regex?
If I have a string with any type of non-alphanumeric character in it:
13 Answers
13
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What is the printf format specifier for bool?
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I would +1 this if you get rid of the non-single-string-literal expression as the format string. This kind of usage easily turns into unsafe usage. printf("%s", x ? "true" : "false"); would fix the issue.
– R.. GitHub STOP HELPING ICE
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Find the nth occurrence of substring in a string
...tive approach would be the usual way, I think.
Here's an alternative with string-splitting, which can often be useful for finding-related processes:
def findnth(haystack, needle, n):
parts= haystack.split(needle, n+1)
if len(parts)<=n+1:
return -1
return len(haystack)-len(pa...
Finding current executable's path without /proc/self/exe
...es a program is expected to create the same environment (argv, environment strings, etc.) for that program as if it were run from a shell, with some optional extras. A program or user can setup an environment that deviates from this convention for other subordinate programs that it launches but if i...
Is there a REAL performance difference between INT and VARCHAR primary keys?
... ($i = 0; $i < 1000; $i++) {
$val .= '("' . generate_random_string() . '", ' . rand (0, 10000) . ', "' . ($keys[rand(0, 9)]) . '"),';
}
$val = rtrim($val, ',');
$pdo->query('INSERT INTO jan_char VALUES ' . $val);
}
echo "\n" . ($k + 1) . ' millon(s) ...
std::string formatting like sprintf
I have to format std::string with sprintf and send it into file stream. How can I do this?
40 Answers
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Variable number of arguments in C++?
...ut yourself. In the case of printf(), for example, the function parses the string argument for special tokens to figure out how many extra arguments it should expect in the variable argument list.
– wilhelmtell
Jun 23 '10 at 21:33
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Best practices/performance: mixing StringBuilder.append with String.concat
...m trying to understand what the best practice is and why for concatenating string literals and variables for different cases. For instance, if I have code like this
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How can I pad an int with leading zeros when using cout
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but.. how can I write formatted output to a string (char* or char[]) not to console directly. Actually I am writing a function that returns formatted string
– shashwat
Dec 23 '12 at 9:32
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