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Java's L number (long) specification
...riable like: long _lo = 30; and not 30L does this mean my variable will be converted into float ? Or in case of _lo = _lo + 2.77 that _lo will be casted into float although it was declared as long
– luigi7up
Oct 19 '12 at 10:28
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Iterator Loop vs index loop [duplicate]
.... If your container's size is larger than INT_MAX then obviously you can't convert it to int and the code fails. long long would be safer (especially as it's finally standard). I will never create a vector with 2^63 elements but I might with 2^31.
– Steve Jessop
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How can I format a String number to have commas and round?
...s that would get formatted as 1.000.500.000,57 instead).
You also need to convert that string into a number, this can be done with:
double amount = Double.parseDouble(number);
Code sample:
String number = "1000500000.574";
double amount = Double.parseDouble(number);
DecimalFormat formatter = ne...
@RequestParam vs @PathVariable
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it may be that the application/x-www-form-urlencoded midia type convert space to +, and the reciever will decode the data by converting the + to space.check the url for more info.http://www.w3.org/TR/html401/interact/forms.h
Get the correct week number of a given date
...lly verified this to be correct for years 2012 to 2018 (assuming that epochconverter.com is correct). We should all rejoice this year that week 1 of 2018 actually started on the first of January for once!
– Aidan
Oct 21 '18 at 10:39
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How to check if any flags of a flag combination are set?
...T : struct
{
CheckIsEnum<T>(true);
long lValue = Convert.ToInt64(value);
long lFlag = Convert.ToInt64(flag);
return (lValue & lFlag) != 0;
}
public static IEnumerable<T> GetFlags<T>(this T value) where T : struct
{
CheckI...
How to convert hashmap to JSON object in Java
How to convert or cast hashmap to JSON object in Java, and again convert JSON object to JSON string?
29 Answers
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Generate a random number in the range 1 - 10
...: select (trunc(random() * 10) % 10) + 1
The output from trunc has to be converted to INTEGER. But it can be done without trunc. So it turns out to be simple.
select (random() * 9)::INTEGER + 1
Generates an INTEGER output in range [1, 10] i.e. both 1 & 10 inclusive.
For any number (floats)...
How can I return NULL from a generic method in C#?
... the problem with this is that if you're using this generic method to say, convert a Database object from DbNull to Int and it returns default(T) where T is an int, it'll return 0. If this number is actually meaningful, then you'd be passing around bad data in cases where that field was null. Or a b...
Difference between declaring variables before or in loop?
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So both look exactly same after compilation. In managed languages code is converted into CL/byte code and at time of execution it's converted into machine language. So in machine language a double may not even be created on the stack. It may just be a register as code reflect that it is a temporary...