Here’s a quick hack: <?php function regex_range($from, $to) { if($from < 0 || $to < 0) { throw new Exception(“Negative values not supported”); } if($from > $to) { throw new Exception(“Invalid range $from..$to, from > to”); } $ranges = array($from); $increment = 1; $next = $from; $higher = true; while(true) { $next += $increment; if($next … Read more
2147483648 doesn’t fit into an int or a long on your system, so it’s treated as a constant of type unsigned long. (Edit: as ouah pointed out in the comments, it’s undefined behaviour in standard C++, but your compiler accepts it as an extension.) Negating an unsigned integer value is possible, but results in another … Read more
Reason for Infinite loop: cin goes into a failed state and that makes it ignore further calls to it, till the error flag and buffer are reset. cin.clear(); cin.ignore(100, ‘\n’); //100 –> asks cin to discard 100 characters from the input stream. Check if input is numeric: In your code, even a non-int type gets … Read more
There is a difference at run-time. int[] is an array of primitive int values. Integer[] is an “object” array, holding references to Integer objects. Most important practical difference: int[] cannot hold null values. But I’m still confused: does int[] store just a primitive values? If so – doesn’t it mean that primitive types can live … Read more
You won’t find a mandatory reason why java.lang wrappers must be immutable. Simply because it’s a design decision. They could have decided otherwise. The language designers had to choose between mutable and immutable. And they chose immutable. That’s it. There are some compelling (IMO) reasons though to make them immutable: It’s consistent with String. The … Read more
Because subtraction is coercing up to an integer. As I recall, byte is an unsigned type in C#, so subtraction can take you out of the domain of bytes.
(1) If all the bits in an integer type are zero, does the integer as whole represent zero? Yes, the bit pattern consisting of all zeroes always represents 0: The representations of integral types shall define values by use of a pure binary numeration system.49 [ยง3.9.1/7] 49 A positional representation for integers that uses the … Read more
The NumberPicker widget is probably what you want. Unfortunately it’s located in com.android.internal.Widget.NumberPicker which we cannot get to through normal means. There are two ways to use it: Copy the code from android source Use reflection to access the widget Here’s the xml for using it in a layout: <com.android.internal.widget.NumberPicker android:id=”@+id/picker” android:layout_width=”wrap_content” android:layout_height=”wrap_content”/> Here’s the … Read more
You mean this? num = 1234 lst = [int(i) for i in str(num)]
int is a “most efficient type” in speed/size – but that is not specified by per the C spec. It must be 16 or more bits. int_fast16_t is most efficient type in speed with at least the range of a 16 bit int. Example: A given platform may have decided that int should be 32-bit … Read more