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Are types like uint32, int32, uint64, int64 defined in any stdlib header?
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The C99 stdint.h defines these:
int8_t
int16_t
int32_t
uint8_t
uint16_t
uint32_t
And, if the architecture supports them:
int64_t
uint64_t
There are various other integer typedefs in stdint.h as well.
If you're stuck witho...
Checking if a double (or float) is NaN in C++
... function available in current C++ Standard Library. It was introduced in C99 and defined as a macro not a function. Elements of standard library defined by C99 are not part of current C++ standard ISO/IEC 14882:1998 neither its update ISO/IEC 14882:2003.
In 2005 Technical Report 1 was proposed. Th...
Python - Create a list with initial capacity
..._appending took 118.00003051757812 ms
prealloc_array_by_extending took 102.99992561340332 ms
prealloc_array took 3.000020980834961 ms
prealloc_array took 49.00002479553223 ms
prealloc_array took 316.9999122619629 ms
prealloc_array took 473.00004959106445 ms
prealloc_array took 1677.9999732971191 ms
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Comma in C/C++ macro
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This is possible with P99:
#include "p99/p99.h"
#define FOO(...) P99_ALLBUTLAST(__VA_ARGS__) P99_LAST(__VA_ARGS__)
FOO()
The code above effectively strips only the last comma in the argument list. Check with clang -E (P99 requires a C99 compiler...
How to make a background 20% transparent on Android
...o use opacity then you can use the below code:
<color name="black">#99000000</color> <!-- 99 is for alpha and others pairs zero's are for R G B -->
And below for opacity code: and all opacity level here
Hex Opacity Values
100% — FF
95% — F2
90% — E6
85% — D9
80% — CC
75...
Struggling with NSNumberFormatter in Swift for currency
...tring { Formatter.currencyBR.string(for: self) ?? "" }
}
let price = 1.99
print(Formatter.currency.locale) // "en_US (current)\n"
print(price.currency) // "$1.99\n"
Formatter.currency.locale = .br
print(price.currency) // "R$1,99\n"
Formatter.currency.locale = .uk
print(price.cu...
Correct format specifier for double in printf
...worth, for a long double, you use %Lf for either printf or scanf).
1. C99, §6.5.2.2/6: "If the expression that denotes the called function has a type that does not include a prototype, the integer promotions are performed on each argument, and arguments that have type float are promoted to doub...
The Definitive C Book Guide and List
...chie (1988). Still a good, short but complete introduction to C (C90, not C99 or later versions), written by the inventor of C. However, the language has changed and good C style has developed in the last 25 years, and there are parts of the book that show its age.
C: A Reference Manual (5th Editi...
Set multiple properties in a List ForEach()?
... can support multiple lines:
list.ForEach(i => { i.a = "hello!"; i.b = 99; });
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Can code that is valid in both C and C++ produce different behavior when compiled in each language?
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Alexey FrunzeAlexey Frunze
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