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When would I need a SecureString in .NET?
...dance from MS is: SecureString shouldn't be used
– Richard Morgan
Jul 5 '19 at 11:24
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Where is PATH_MAX defined in Linux?
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Its in linux/limits.h.
#define PATH_MAX 4096 /* # chars in a path name including nul */
#include <linux/limits.h>
char current_path[PATH_MAX];
PATH_MAX has some flaws as mentioned in this blog (thanks paulsm4)
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How to report an error from a SQL Server user-defined function
...T to throw meaningful error:
create function dbo.throwError()
returns nvarchar(max)
as
begin
return cast('Error happened here.' as int);
end
Then Sql Server will show some help information:
Msg 245, Level 16, State 1, Line 1
Conversion failed when converting the varchar value 'Error happened...
Emacs bulk indent for Python
... region as normal, then:
C-x r t (string-rectangle): will prompt you for characters you'd like to insert into each line; great for inserting a certain number of spaces
C-x r k (kill-rectangle): remove a rectangle region; great for removing indentation
You can also C-x r y (yank-rectangle), but t...
What does void* mean and how to use it?
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Before void pointers were available "char *" was used instead. But void is better as it cannot actually be used to alter anything directly.
– user50619
Jun 4 '19 at 13:08
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Why doesn't Dictionary have AddRange?
...hods let you pass in IEqualityComparer when relevant: var combined = dict1.Concat(dict2).GroupBy(kvp => kvp.Key, dict1.Comparer).ToDictionary(grp => grp.Key, grp=> grp.First(), dict1.Comparer);
– Kyle McClellan
Mar 20 '18 at 19:32
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Which is the preferred way to concatenate a string in Python?
Since Python's string can't be changed, I was wondering how to concatenate a string more efficiently?
12 Answers
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How to check if a string in Python is in ASCII?
...so, then the original string is ASCII.
def isascii(s):
"""Check if the characters in string s are in ASCII, U+0-U+7F."""
return len(s) == len(s.encode())
To check, pass the test string:
>>> isascii("♥O◘♦♥O◘♦")
False
>>> isascii("Python")
True
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Using scanf() in C++ programs is faster than using cin?
...numbers.
iostream version:
#include <iostream>
int main(int argc, char **argv) {
int parity = 0;
int x;
while (std::cin >> x)
parity ^= x;
std::cout << parity << std::endl;
return 0;
}
scanf version:
#include <stdio.h>
int main(int argc, char **a...
RE error: illegal byte sequence on Mac OS X
...'s/./@/' <<<$'\xfc' fails, because byte 0xfc is not a valid UTF-8 char.
Note that, by contrast, GNU sed (Linux, but also installable on macOS) simply passes the invalid byte through, without reporting an error.
Using the formerly accepted answer is an option if you don't mind losing suppor...