What's the difference between `1L` and `1`? - Stack Overflow
An integer vector uses only 4 bytes per element. For large vectors, that's less wasted memory and less to wade through for the CPU (so it's typically faster). Mostly this applies when working with indices. Here's an example where adding 1 to an integer vector turns it into a double vector: x <- 1:100. typeof(x) # integer.
What is "-1L" / "1L" in C? - Stack Overflow
47. The L specifies that the number is a long type, so -1L is a long set to negative one, and 1L is a long set to positive one. As for why ftell doesn't just return NULL, it's because NULL is used for pointers, and here a long is returned. Note that 0 isn't used because 0 …
java - What means 1L serialVersionUID? When could I use this …
The 1L has no special meaning. It is just a number that will match 1L as the "other" version id. To my mind, you are better off either using 0L, or a version number that was (at some point) generated using the standard algorithm. If you use 0L, then you get definite deserialization exceptions if classes change in ways that could be source of ...
java - Difference between 1L and (long) 1 - Stack Overflow
Dec 4, 2020 · With L gives all the job to compiler and "save time" at runtime, because there are no extra steps to convert int to long. And also with L is more readable. – KunLun. Dec 4, 2020 at 16:26. 5. (long) 1 evaluates to the same constant as 1L. However in the first case the number (1) is evaluated as integer whereas 1L is always a long.
Java's L number (long) specification - Stack Overflow
By default value 2147483647 is considered by java compiler is int type. Internal type casting is done by compiler and int is auto promoted to Long type. long l = 2147483648; //CE: value is treated as int but out of range. Here we need to put suffix as L to treat the literal 2147483648 as long type by java compiler.
Why generate long serialVersionUID instead of a simple 1L?
May 20, 2009 · 81. The purpose of the serialization version UID is to keep track of different versions of a class in order to perform valid serialization of objects. The idea is to generate an ID that is unique to a certain version of an class, which is then changed when there are new details added to the class, such as a new field, which would affect the ...
java - Static Final Long serialVersionUID = 1L - Stack Overflow
what is meant by that in a servlet (private static final long serialVersionUID = 1L)? I have 1 simple question about this guided program given by our professor. I have seen serialVersionUID several times but I dont what's that for.
c - What does 1L mean? - Stack Overflow
Jan 1, 2013 · Integer suffixes are u (unsigned), l (lowercase L) (long), ll (long long), ul (unsigned long), ull (unsigned long long), lu (long unsigned), llu (long long unsigned) and uppercase versions. Floating suffixes are f (float) and l (long double) and uppercase versions. The L suffix makes it a long instead of an int literal -- it can be applied to ...
r - Error in na.fail.default: missing values in object - but no missing ...
tl;dr you have to use na.exclude() (or whatever) on the whole data frame at once, so that the remaining observations stay matched up across variables ...
c - clarity of -1L < 1U and -1L > 1UL - Stack Overflow
Jul 31, 2014 · For example, suppose that int is 16 bits and long is 32 bits. Then -1L < 1U, because 1U, which is an unsigned int, is promoted to a signed long. But -1L > 1UL because -1L is promoted to unsigned long and thus appears to be a large positive number. From my beginning of C, i have little difficult regarding this Unsigned and Signed values.