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C#: how to get first char of a string?
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Select the oldest tab to see that it as Matthew
– johnc
Oct 7 '10 at 5:10
11
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What is an unsigned char?
In C/C++, what an unsigned char is used for? How is it different from a regular char ?
17 Answers
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Creating C formatted strings (not printing them)
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Use sprintf.
int sprintf ( char * str, const char * format, ... );
Write formatted data to string Composes a string with the same text
that would be printed if format was used on printf, but instead of
being printed, the content is stored as a C stri...
How to run SQL script in MySQL?
... If the purpose of writing to file is taking data dump, I guess SELECT ... INTO OUTFILE /path/to/file.csv is more efficient way. See options and syntax here - dev.mysql.com/doc/refman/5.7/en/select-into.html
– Anis
Feb 21 '18 at 6:43
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Storing SHA1 hash values in MySQL
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I would use VARCHAR for variable length data, but not with fixed length data. Because a SHA-1 value is always 160 bit long, the VARCHAR would just waste an additional byte for the length of the fixed-length field.
And I also wouldn’t sto...
Case-insensitive string comparison in C++ [closed]
...on. ñ can be represented as a combining ˜ followed by an n, or with a ñ character. You need to use Unicode string normalization before performing the comparaison. Please review Unicode Technical Report #15, unicode.org/reports/tr15
– vy32
Nov 11 '11 at 3:2...
How to initialize all members of an array to the same value?
...8(...) STRUCTVAL_32(__VA_ARGS__), STRUCTVAL_16(__VA_ARGS__)
struct Pair { char key[16]; char val[32]; };
struct Pair p_data[] = { STRUCTVAL_48("Key", "Value") };
int a_data[][4] = { STRUCTVAL_48(12, 19, 23, 37) };
macro names are negotiable.
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SQL query to group by day
...dateadd(DAY,0, datediff(day,0, created)) return '2009-11-02 00:00:00.000'
select sum(amount) as total, dateadd(DAY,0, datediff(day,0, created)) as created
from sales
group by dateadd(DAY,0, datediff(day,0, created))
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How to match “any character” in regular expression?
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Yes, you can. That should work.
. = any char
\. = the actual dot character
.? = .{0,1} = match any char zero or one times
.* = .{0,} = match any char zero or more times
.+ = .{1,} = match any char one or more times
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Best way to replace multiple characters in a string?
I need to replace some characters as follows: & ➔ \& , # ➔ \# , ...
13 Answers
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