types

问题 I have changed one of the fields of my collection in mongoDB from an array of strings to an array of object containing 2 strings. New documents get inserted without any problem, but when a get method is called to get , querying all the documents I get this error: Failed to decode 'Students'. Decoding 'photoAddresses' errored with: readStartDocument can only be called when CurrentBSONType is DOCUMENT, not when CurrentBSONType is STRING. photoAddresses is the field that was changed in Students.

问题 I'm trying to transform some fields of my object by providing field names, currently I wrote something like follows: interface Foo { a: number[], b: string[], } type Bar = { [T in keyof Foo] : (arg : Foo[T]) => Foo[T] } function test<T extends keyof Foo>(field: T) { const foo : Foo = { a: [], b: [], }; const bar: Bar = { a: arg => /* some code */ [], b: arg => /* some code */ [], }; foo[field] = bar[field](foo[field]); } But I end up with the following error message on bar[field](foo[field])

问题 Is it possible, in typescript, to let a method accept Partial<Something> , in a way that Something 's sub-properties are all set to optional too? export interface ISomething { user: IUser; } export interface IUser { id: number; name: string; } export const myMethod = (something: Partial<ISomething>): void => {}; myMethod({ user: { id: 1, name: "" } }); //this works myMethod({ user: { id: 1 } }); //this doesn't (but I want this to work too) many thanks ;) 回答1: You are essentially looking for

问题 While it has been previously answered how to fake isinstance, in this case I'm trying to fake the response given by type() while reviewing the TypeChanger class. For context Im just trying to understand if is doable or not and why for Python 3.X This is my current test setup: def test(): class TypeChanger(): @classmethod def __instancecheck__(cls, instance): if instance is list: return True else: return False @property def __class__(self): return list def extra_functionality(self): return

问题 Ideally I would like a function which works as follows (for all kinds of numpy functions): parameter_types('np.random.binomial') and returns: {'a: 'int', 'b':'float', 'size':'int'} I understand that jedi has some support for extracting this information from docstrings, but I cannot make it work. Is it possible to get something like this using jedi? 回答1: As found in this answer, your best bet is to install numpydoc and its requirements. import numpydoc import numpy as np doc = numpydoc

问题 Ideally I would like a function which works as follows (for all kinds of numpy functions): parameter_types('np.random.binomial') and returns: {'a: 'int', 'b':'float', 'size':'int'} I understand that jedi has some support for extracting this information from docstrings, but I cannot make it work. Is it possible to get something like this using jedi? 回答1: As found in this answer, your best bet is to install numpydoc and its requirements. import numpydoc import numpy as np doc = numpydoc

问题 bool , int ,and string (to name a few), are all aliases of System types. They can all be used without the System directive being included. Yet the types they alias can't be used without the System directive. public class Test { public static void Main() { bool b; //valid Boolean b2; //compiler error int i; //valid Int32 i2; //compiler error string s; //valid String s2; //compiler error } } I have few questions as to why this works. Is the compiler making an exception for these commonly used

问题 bool , int ,and string (to name a few), are all aliases of System types. They can all be used without the System directive being included. Yet the types they alias can't be used without the System directive. public class Test { public static void Main() { bool b; //valid Boolean b2; //compiler error int i; //valid Int32 i2; //compiler error string s; //valid String s2; //compiler error } } I have few questions as to why this works. Is the compiler making an exception for these commonly used

问题 bool , int ,and string (to name a few), are all aliases of System types. They can all be used without the System directive being included. Yet the types they alias can't be used without the System directive. public class Test { public static void Main() { bool b; //valid Boolean b2; //compiler error int i; //valid Int32 i2; //compiler error string s; //valid String s2; //compiler error } } I have few questions as to why this works. Is the compiler making an exception for these commonly used

问题 bool , int ,and string (to name a few), are all aliases of System types. They can all be used without the System directive being included. Yet the types they alias can't be used without the System directive. public class Test { public static void Main() { bool b; //valid Boolean b2; //compiler error int i; //valid Int32 i2; //compiler error string s; //valid String s2; //compiler error } } I have few questions as to why this works. Is the compiler making an exception for these commonly used