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Legality of COW std::string implementation in C++11
...be seen in the following if COW were allowed: std::string a("something"); char& c1 = a[0]; std::string b(a); char& c2 = a[1]; c1 is a reference to a. You then "copy" a. Then, when you attempt to take the reference the second time, it has to make a copy to get a non-const reference since...
Scalar vs. primitive data type - are they the same thing?
... pathological, example: strings. In C, a string is a compound (an array of characters), while in Perl, a string is a scalar. In Java, a string is an object (or reference type). In Python, everything is (conceptually) an object/reference type, including strings (and numbers).
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How to convert floats to human-readable fractions?
...duct of these matrices.
*/
#include <stdio.h>
main(ac, av)
int ac;
char ** av;
{
double atof();
int atoi();
void exit();
long m[2][2];
double x, startx;
long maxden;
long ai;
/* read command line arguments */
if (ac != 3) {
fprintf(stderr, "usage...
Get Character value from KeyCode in JavaScript… then trim
...
"LEFT", // [37]
"UP", // [38]
"RIGHT", // [39]
"DOWN", // [40]
"SELECT", // [41]
"PRINT", // [42]
"EXECUTE", // [43]
"PRINTSCREEN", // [44]
"INSERT", // [45]
"DELETE", // [46]
"", // [47]
"0", // [48]
"1", // [49]
"2", // [50]
"3", // [51]
"4", // [52]
"5", // [53]...
A std::map that keep track of the order of insertion?
...
Thats great! Boost even has a member-selector to do the job!
– xtofl
Jul 8 '09 at 14:19
2
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How do I check if a number is positive or negative in C#?
...
This is the industry standard:
int is_negative(float num)
{
char *p = (char*) malloc(20);
sprintf(p, "%f", num);
return p[0] == '-';
}
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How to read a file in reverse order?
... while position >= 0:
qfile.seek(position)
next_char = qfile.read(1)
if next_char == "\n":
yield line[::-1]
line = ''
else:
line += next_char
position -= 1
yield line[::-1]
if __n...
Why can't a text column have a default value in MySQL?
... I try to recreate the table locally with the obvious default (based on a select of unique values for that column) and end up receiving the oh-so-useful BLOB/TEXT column can't have a default value.
Again, not maintaining basic compatability across platforms is unacceptable and is a bug.
How to ...
Count the number of occurrences of a character in a string in Javascript
I need to count the number of occurrences of a character in a string.
33 Answers
33
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Ruby: How to get the first character of a string
How can I get the first character in a string using Ruby?
13 Answers
13
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