Assuming: You have 2’s-complement representations in mind; and, By (unsigned long) you mean unsigned 32-bit integer, then you just need to add 2**32 (or 1 << 32) to the negative value. For example, apply this to -1: >>> -1 -1 >>> _ + 2**32 4294967295L >>> bin(_) ‘0b11111111111111111111111111111111’ Assumption #1 means you want -1 to … Read more
Typically by overloading operator<< for your class: struct myclass { int i; }; std::ostream &operator<<(std::ostream &os, myclass const &m) { return os << m.i; } int main() { myclass x(10); std::cout << x; return 0; }
The Big Picture There are two issues at play here: Integer getInteger(String) doesn’t do what you think it does It returns null in this case the assignment from Integer to int causes auto-unboxing Since the Integer is null, NullPointerException is thrown To parse (String) “123” to (int) 123, you can use e.g. int Integer.parseInt(String). References … Read more
Why this is not possible: Because String and Integer are not in the same Object hierarchy. Object / \ / \ String Integer The casting which you are trying, works only if they are in the same hierarchy, e.g. Object / / A / / B In this case, (A) objB or (Object) objB or … Read more
The value 3172978990 is greater than 2147483647 – the maximum value for INT – hence the error. MySQL integer types and their ranges are listed here. Also note that the (10) in INT(10) does not define the “size” of an integer. It specifies the display width of the column. This information is advisory only. To … Read more
32-bit unsigned integers are IPv4 addresses. Meanwhile, the IPAddress.Address property, while deprecated, is an Int64 that returns the unsigned 32-bit value of the IPv4 address (the catch is, it’s in network byte order, so you need to swap it around). For example, my local google.com is at 64.233.187.99. That’s equivalent to: 64*2^24 + 233*2^16 + … Read more
Create is_number? Method. Create a helper method: def is_number? string true if Float(string) rescue false end And then call it like this: my_string = ‘12.34’ is_number?( my_string ) # => true Extend String Class. If you want to be able to call is_number? directly on the string instead of passing it as a param to … Read more
There are multiple classes that are grouped together as “numeric” classes, the 2 most common of which are double (for double precision floating point numbers) and integer. R will automatically convert between the numeric classes when needed, so for the most part it does not matter to the casual user whether the number 3 is … Read more
Using Google Collections from Guava-Project, you could use the transform method in the Lists class import com.google.common.collect.Lists; import com.google.common.base.Functions List<Integer> integers = Arrays.asList(1, 2, 3, 4); List<String> strings = Lists.transform(integers, Functions.toStringFunction()); The List returned by transform is a view on the backing list – the transformation will be applied on each access to the transformed … Read more
Per https://docs.python.org/3/reference/lexical_analysis.html#integer-literals: Integer literals are described by the following lexical definitions: integer ::= decimalinteger | octinteger | hexinteger | bininteger decimalinteger ::= nonzerodigit digit* | “0”+ nonzerodigit ::= “1”…”9″ digit ::= “0”…”9″ octinteger ::= “0” (“o” | “O”) octdigit+ hexinteger ::= “0” (“x” | “X”) hexdigit+ bininteger ::= “0” (“b” | “B”) bindigit+ octdigit ::= … Read more