I have an Entity with attribute of type Int64. But, I need to save an object with type Unsigned Long Int or unsigned long long Int. How can I do it?
Swift, please (:
Simply:
let x = Int64(5) //Int64
let y = CUnsignedLongLong(bitPattern: x) //Unsigned Long Long
Related
Is there a way to convert an integer into the format Uint32.
int x = 94;
Uint32 y = x.toUint32(); ///Pseudocode
Dart doesn't have a unsigned integers.
You can however use a BigInt and use toUnsigned(32) after each operation you do to it.
How do I convert from int to uint16 in vala?
My requirement is to convert the text in decimal in a gtkEntry to uint16.
How do I do this?
Just cast. uint16 as_uint16 = (uint16) as_int;
You may want to first check that the value is between uint16.MIN and uint16.MAX.
int myint = 543;
uint16 z = 0 + myint;
What are the differences between the data types Int & UInt8 in swift.
Looks like UInt8 is used for binary data, i need to convert UInt8 to Int is this possible.
That U in UInt stands for unsigned int.
It is not just using for binary data. Uint is used for positive numbers only, like natural numbers.
I recommend you to get to know how negative numbers are understood from a computer.
Int8 is an Integer type which can store positive and negative values.
UInt8 is an unsigned integer which can store only positive values.
You can easily convert UInt8 to Int8 but if you want to convert Int8 to UInt8 then make sure value should be positive.
UInt8 is an 8bit store, while Int not hardly defined or defined by the compiler:
https://developer.apple.com/library/content/documentation/Swift/Conceptual/Swift_Programming_Language/TheBasics.html
Int could be 32 or 64 bits
Updated for swift:
Operation Output Range Bytes per Element
uint8 0 to 255 1
Int - 9223372036854775808 to 9223372036854775807 2 or 4
If you want to find the max and min range of Int or UInt8:
let maxIntValue = Int.max
let maxUInt8Value = UInt8.max
let minIntValue = Int.min
let minUInt8Value = UInt8.min
If you want to convert UInt8 to Int, used below simple code:
func convertToInt(unsigned: UInt) -> Int {
let signed = (unsigned <= UInt(Int.max)) ?
Int(unsigned) :
Int(unsigned - UInt(Int.max) - 1) + Int.min
return signed
}
I must be doing something really obviously wrong, but I can't see it.
A double is a C type, not an Objective-C object. Hence you use C casts:
double myDouble = 3.2;
int myInt = (int)myDouble;
Just converting mentioned above is good enough though you might want to use floor() or ceil() functions before that.
intValue is a method for a NSNumber instance.
For scale type like int, double, and float, they are not class type. So, they have no methods. Some languages like C# may wrap int, or double as a object, and they can be transfered to each other by a sub-routine.
try this
NSInteger number=33;
NSUInteger count = (NSInteger)[number];
here, NSUInteger is long.
number is NSInteger
double myDouble = 3.2;
int myInt = #(myDouble).intValue;
Sample of code I actually use:
NSNumber * percentLike1 = #(#(self.percentLike.doubleValue*100).integerValue);
I need to assign 2,554,416,000 to a variable. What would be the primitive to use, and what would be the object representation class to use? Thanks.
Chuck is right, but in answer to the "object representation", you want NSNumber used with the unsignedInt methods.
NSNumber *myNum = [NSNumber numberWithUnsignedInt:2554416000];
NSUInteger myInt = [myNum unsignedIntValue];
2,554,416,000 = 0x9841,4B80 ≤ 0xFFFF,FFFF (UINT_MAX), so uint32_t (unsigned int) or int64_t (long long).
A signed int32_t (int) cannot represent this because 0x9841,4B80 > 0x7FFF,FFFF (INT_MAX). Storing it in an int will make it negative.
This can be represented by a 32-bit unsigned integer (UINT_MAX is about 4 billion). That's actually what NSUInteger is on the iPhone, but if you want to be very specific about the bit width, you could specify a uint32_t.
You could store it in a regular int scaled down by 1000 if you wanted, if this represented a score that could never have the bottom 3 digits hold any info or something similiar. This would be a way to save a few bits and possibly an entire extra int of space, if that matters.