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How to print Boolean flag in NSLog?
...ut integers only, they are just type casted values like...
typedef signed char BOOL;
#define YES (BOOL)1
#define NO (BOOL)0
BOOL value = YES;
NSLog(@"Bool value: %d",value);
If output is 1,YES otherwise NO
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Remove the last three characters from a string
I want to remove last three characters from a string:
14 Answers
14
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What does the comma operator , do?
...ariables used in a for loop, and it gives the following example:
void rev(char *s, size_t len)
{
char *first;
for ( first = s, s += len - 1; s >= first; --s)
/*^^^^^^^^^^^^^^^^^^^^^^^*/
putchar(*s);
}
Otherwise there are not many great uses of the comma operator, although it i...
How do I wrap text in a pre tag?
...de wont get word-wrapped in the middle of a path or something.
Easier to select text range in a text area too if you want to copy to clipboard.
The following is a php excerpt so if your not in php then the way you pack the html special chars will vary.
<textarea style="font-family:monospace;"...
Which is faster : if (bool) or if(int)?
... @Nathan: No. C++ has no bit data types. The smallest type is char, which is a byte by definition, and is the smallest addressable unit. bool's size is implementation-defined, and may be 1, 4, or 8, or whatever. Compilers tend to make it one, though.
– GManNickG
...
What breaking changes are introduced in C++11?
...hose for others to elaborate on.
Core language
#define u8 "abc"
const char *s = u8"def"; // Previously "abcdef", now "def"
#define _x "there"
"hello"_x // now a user-defined-string-literal. Previously, expanded _x .
New keywords: alignas, alignof, char16_t, char32_t, constexpr, declt...
What is the MySQL VARCHAR max size?
I would like to know what the max size is for a MySQL VARCHAR type.
7 Answers
7
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ruby 1.9: invalid byte sequence in UTF-8
...il if string.nil?
return string if string.valid_encoding?
string.chars.select { |c| c.valid_encoding? }.join
end
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How to delete duplicate lines in a file without sorting it in Unix?
... <sniff> makes me sad. ;) Anyways, [ -~] represents a range of ASCII characters from 0x20 (space) to 0x7E (tilde). These are considered the printable ASCII characters (linked page also has 0x7F/delete but that doesn't seem right). That makes the solution broken for anyone not using ASCII or an...
SQL ON DELETE CASCADE, Which Way Does the Deletion Occur?
...ould restructure your schema into this,
CREATE TABLE Categories
(
Code CHAR(4) NOT NULL PRIMARY KEY,
CategoryName VARCHAR(63) NOT NULL UNIQUE
);
CREATE TABLE Courses
(
CourseID INT NOT NULL PRIMARY KEY,
BookID INT NOT NULL,
CatCode CHAR(4) NOT NULL,
CourseNum CHAR(3) NOT NULL,
Cour...