int

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 5 years ago . Improve this question I want to know how to get the product of two integers using only the addition or subtraction operators and without using the division and multiplication. If you could add the while statement that would be helpful. A Basically, I want to know how to add a

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 5 years ago . Improve this question I want to know how to get the product of two integers using only the addition or subtraction operators and without using the division and multiplication. If you could add the while statement that would be helpful. A Basically, I want to know how to add a

问题 I'm trying to convert a Series object to integer. But I'm having trouble doing it. Every time I try something I have a new Error. I tried to convert using pd.to_numeric , error while parsing string None Then I tried to replace None values with NaN : problem replacing #1.1) pd.to_numeric(df['Var1'], downcast = 'integer') ValueError: Unable to parse string "None" at position 44816 #1.2) df.astype({'Var1':'int64'}).dtypes TypeError: int() argument must be a string, a bytes-like object or a

问题 I'm trying to convert a Series object to integer. But I'm having trouble doing it. Every time I try something I have a new Error. I tried to convert using pd.to_numeric , error while parsing string None Then I tried to replace None values with NaN : problem replacing #1.1) pd.to_numeric(df['Var1'], downcast = 'integer') ValueError: Unable to parse string "None" at position 44816 #1.2) df.astype({'Var1':'int64'}).dtypes TypeError: int() argument must be a string, a bytes-like object or a

问题 We found an interesting case in our business logic that totally breaks our logic and we don't understand why NSDecimalNumber and Decimal behaves the way it does. My playground for the cases is as follows: import Foundation let pQuantity = Decimal(string: "0.2857142857142857")! let pPrice = Decimal(string: "7.00000000000000035")! let calced = NSDecimalNumber(decimal: pQuantity * pPrice * Decimal(integerLiteral: 100)) // 200 let decimal = calced.decimalValue // 199

问题 Is it possible to populate a JComboBox with an int[]? I am writing a code that will use a JComboBox populated with years (in integers). The code I have written is this: int[] birthYear = new int[currentYear]; //currentYear is an int variable int inc=1; for(int i=0;i<currentYear;i++) { birthYear[i]= inc; inc++; } birthYearBox = new JComboBox(birthYear); //this is the line in which the error occurs I want these to integers in the ComboBox so that I can subtract from them. Do I have to populate

问题 I'm using the WPF Extended Toolkit ( http://wpftoolkit.codeplex.com/ ). It has a nice NumericUpDown control that I'd like to use, but internally it uses doubles - which means it uses double.MinValue and double.MaxValue. I'd like to use the same control, but I need a generic version - for ints it needs to use int.MaxValue/MinValue, for floats float.MaxValue/MinValue, etc. (I think you get the idea :)) So I though about copying the NumericUpDown to a GNumericUpDown, where T would ofcourse be

问题 My code is as follows: from typing import Tuple a: Tuple[int, int] = tuple(sorted([1, 3])) Mypy tells me: Incompatible types in assignment (expression has type "Tuple[int, ...]", variable has type "Tuple[int, int]") What am I doing wrong? Why can't Mypy figure out that the sorted tuple will give back exactly two integers? 回答1: The call to sorted produces a List[int] which carries no information about length. As such, producing a tuple from it also has no information about the length. The

问题 int.numerator and int.denominator are a mystery to me. help(int.numerator) states: the numerator of a rational number in lowest terms But as far as I know, int is not a rational number. So why do these properties exist? 回答1: See http://docs.python.org/library/numbers.html - int ( numbers.Integral ) is a subtype of numbers.Rational . >>> import numbers >>> isinstance(1337, numbers.Integral) True >>> isinstance(1337, numbers.Rational) True >>> issubclass(numbers.Integral, numbers.Rational) True

问题 int.numerator and int.denominator are a mystery to me. help(int.numerator) states: the numerator of a rational number in lowest terms But as far as I know, int is not a rational number. So why do these properties exist? 回答1: See http://docs.python.org/library/numbers.html - int ( numbers.Integral ) is a subtype of numbers.Rational . >>> import numbers >>> isinstance(1337, numbers.Integral) True >>> isinstance(1337, numbers.Rational) True >>> issubclass(numbers.Integral, numbers.Rational) True