NaN can’t be stored in an integer array. This is a known limitation of pandas at the moment; I have been waiting for progress to be made with NA values in NumPy (similar to NAs in R), but it will be at least 6 months to a year before NumPy gets these features, it seems: … Read more
For float have a look at sys.float_info: >>> import sys >>> sys.float_info sys.floatinfo(max=1.7976931348623157e+308, max_exp=1024, max_10_exp=308, min=2.2 250738585072014e-308, min_exp=-1021, min_10_exp=-307, dig=15, mant_dig=53, epsil on=2.2204460492503131e-16, radix=2, rounds=1) Specifically, sys.float_info.max: >>> sys.float_info.max 1.7976931348623157e+308 If that’s not big enough, there’s always positive infinity: >>> infinity = float(“inf”) >>> infinity inf >>> infinity / 10000 inf The long type has … Read more
The opposite of read is show. Prelude> show 3 “3” Prelude> read $ show 3 :: Int 3
If you are not concerned with potential overflow problems this function will perform about 20-30 times faster than using Integer.parseInt(). public static boolean isInteger(String str) { if (str == null) { return false; } int length = str.length(); if (length == 0) { return false; } int i = 0; if (str.charAt(0) == ‘-‘) { … Read more
Try Character.getNumericValue(char). String element = “el5”; int x = Character.getNumericValue(element.charAt(2)); System.out.println(“x=” + x); produces: x=5 The nice thing about getNumericValue(char) is that it also works with strings like “el٥” and “el५” where ٥ and ५ are the digits 5 in Eastern Arabic and Hindi/Sanskrit respectively.
Note that there is a difference between a cast to long and a cast to Long. If you cast to long (a primitive value) then it should be automatically boxed to a Long (the reference type that wraps it). You could alternatively use new to create an instance of Long, initializing it with the int … Read more
Use Convert.ToInt32 from mscorlib as in decimal value = 3.14m; int n = Convert.ToInt32(value); See MSDN. You can also use Decimal.ToInt32. Again, see MSDN. Finally, you can do a direct cast as in decimal value = 3.14m; int n = (int) value; which uses the explicit cast operator. See MSDN.
Solution Since Python 3, input returns a string which you have to explicitly convert to ints, with int, like this x = int(input(“Enter a number: “)) y = int(input(“Enter a number: “)) You can accept numbers of any base and convert them directly to base-10 with the int function, like this >>> data = int(input(“Enter … Read more
In Java, the ‘int’ type is a primitive, whereas the ‘Integer’ type is an object. In C#, the ‘int’ type is the same as System.Int32 and is a value type (ie more like the java ‘int’). An integer (just like any other value types) can be boxed (“wrapped”) into an object. The differences between objects … Read more
You are looking for the chr function. You seem to be mixing decimal representations of integers and hex representations of integers, so it’s not entirely clear what you need. Based on the description you gave, I think one of these snippets shows what you want. >>> chr(0x65) == ‘\x65’ True >>> hex(65) ‘0x41’ >>> chr(65) … Read more