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2. Long vs Integer, long vs int, what to use and when?

   stackoverflow.com/questions/5857812

   Long is the Object form of long, and Integer is the object form of int. The long uses 64 bits. The int uses 32 bits, and so can only hold numbers up to ±2 billion (-2 31 to +2 31 -1). You should use long and int, except where you need to make use of methods inherited from Object, such as hashcode. Java.util.collections methods usually use the ...

3. How to convert String to long in Java? - Stack Overflow

   stackoverflow.com/questions/7693324

   So Long number = Long.valueOf("123"), Long number = Long.parseLong("123") and Long number = Long.valueOf(Long.parseString("123") all end up doing pretty much the same thing. What you do want to be careful about is not calling constructors of the boxed primitive classes - that can be wasteful. So don't write Long number = new Long(parseLong("123"))

4. java - How to convert / cast long to String? - Stack Overflow

   stackoverflow.com/questions/1854924

   If your Long might be null and you don't want to get a 4-letter "null" string, you might use Objects.toString, like: String s = Objects.toString(date, null); EDIT: You reverse it using Long l = Long.valueOf(s); but in this direction you need to catch NumberFormatException

5. sql - What is the best way to search the Long datatype within an...

   stackoverflow.com/questions/769787

   12. You can't search LONGs directly. LONGs can't appear in the WHERE clause. They can appear in the SELECT list though so you can use that to narrow down the number of rows you'd have to examine. Oracle has recommended converting LONGs to CLOBs for at least the past 2 releases. There are fewer restrictions on CLOBs.

6. Convert long into hexadecimal string (like a memory address)

   stackoverflow.com/questions/26956025

   So I have these longs, 5488461193L and 5545007984L and I need to be able to convert them into memory addresses like this, 0x143EE69B0. I know they are memory addresses because they were originally memory addresses but I've only got the long versions of them. Sorry if its a bit hard to understand.

7. How to scanf long long long int in C - Stack Overflow

   stackoverflow.com/questions/28777876

   (Also, long long int is not guaranteed to be longer than 64 bits, which might also be the width of long.) In other words, if you want to work with very large integers, you'll need a library. These are typically called "bignum libraries", and you'll have little trouble searching for one.

8. How to check a Long for null in java - Stack Overflow

   stackoverflow.com/questions/26638047

   You can check Long object for null value with longValue == null , you can use longValue == 0L for long (primitive), because default value of long is 0L, but it's result will be true if longValue is zero too. answered Oct 29, 2014 at 18:50. Arif Ulusoy. 244 2 12.

9. c++ - What's the 'long' data type used for? - Stack Overflow

   stackoverflow.com/questions/4329277

   And concluded that long is now useless. Prior to the rise of 64-bit systems, the de facto standard for C integer types was: char = (u)int8_t (Note that C predates Unicode.) short = int16_t; int = intptr_t [until 64-bit], int_fast16_t; long = int32_t [until 64-bit], intmax_t [until 1999] long long = int64_t or intmax_t; Today, however, long has ...

10. How can I break up this long line in Python? [duplicate]

    stackoverflow.com/questions/2058925

    For anyone who is also trying to call .format() on a long string, and is unable to use some of the most popular string wrapping techniques without breaking the subsequent .format( call, you can do str.format("", 1, 2) instead of "".format(1, 2). This lets you break the string with whatever technique you like.

11. Reshaping data.frame from wide to long format - Stack Overflow

    stackoverflow.com/questions/2185252

    > long Code Country year value 1: AFG Afghanistan 1950 20,249 2: ALB Albania 1950 8,097 3: AFG Afghanistan 1951 21,352 4: ALB Albania 1951 8,986 5: AFG Afghanistan 1952 22,532 6: ALB Albania 1952 10,058 7: AFG Afghanistan 1953 23,557 8: ALB Albania 1953 11,123 9: AFG Afghanistan 1954 24,555 10: ALB Albania 1954 12,246