parameter-passing

问题 This is my first post on StackOverflow, so apologies if I'm not following the correct format. I'm building my first app using tab navigator from React Navigation v 5.x and have run into a big problem when passing props from one screen to another What I want to achieve is to: Make changes to a list of data in one of my screens. Have those changes affect what happens on another screen. I have tried this (I failed to set the props to pass down), this (Deprecated version of react-navigation) and

问题 This is my first post on StackOverflow, so apologies if I'm not following the correct format. I'm building my first app using tab navigator from React Navigation v 5.x and have run into a big problem when passing props from one screen to another What I want to achieve is to: Make changes to a list of data in one of my screens. Have those changes affect what happens on another screen. I have tried this (I failed to set the props to pass down), this (Deprecated version of react-navigation) and

问题 This is my first post on StackOverflow, so apologies if I'm not following the correct format. I'm building my first app using tab navigator from React Navigation v 5.x and have run into a big problem when passing props from one screen to another What I want to achieve is to: Make changes to a list of data in one of my screens. Have those changes affect what happens on another screen. I have tried this (I failed to set the props to pass down), this (Deprecated version of react-navigation) and

问题 This is my first post on StackOverflow, so apologies if I'm not following the correct format. I'm building my first app using tab navigator from React Navigation v 5.x and have run into a big problem when passing props from one screen to another What I want to achieve is to: Make changes to a list of data in one of my screens. Have those changes affect what happens on another screen. I have tried this (I failed to set the props to pass down), this (Deprecated version of react-navigation) and

问题 In this question I asked about a method to explicitly prevent passed arguments to change. An obvious solutions is defining copys of the arguments and operate the algorithm on those copys. However in the comment I was pointed to the fact, that I could call the function and wrapp the argument I didn't want to change in brackets. This would have the same effect as creating a copy of that passed variables so that it would not change. But I don't understand how it works and what the brackets are

问题 In this question I asked about a method to explicitly prevent passed arguments to change. An obvious solutions is defining copys of the arguments and operate the algorithm on those copys. However in the comment I was pointed to the fact, that I could call the function and wrapp the argument I didn't want to change in brackets. This would have the same effect as creating a copy of that passed variables so that it would not change. But I don't understand how it works and what the brackets are

问题 I'm trying and failing to pass parameters to a custom estimator in scikit learn. I'd like the parameter lr to change during the gridsearch. Problem is that the lr parameter is not changing... The code sample is copied and updated from here (the original code did neither work for me) Any full working example of GridSearchCV with custom estimator, with changing parameters would be appreciated. I'm in ubuntu 18.10 using scikit-learn 0.20.2 from sklearn.model_selection import GridSearchCV from

问题 I'm trying and failing to pass parameters to a custom estimator in scikit learn. I'd like the parameter lr to change during the gridsearch. Problem is that the lr parameter is not changing... The code sample is copied and updated from here (the original code did neither work for me) Any full working example of GridSearchCV with custom estimator, with changing parameters would be appreciated. I'm in ubuntu 18.10 using scikit-learn 0.20.2 from sklearn.model_selection import GridSearchCV from

问题 I have a SQL Server stored procedure that updates a large table. Because of its size, most parameters are optional. Most recommendations for setting the default of my optional parameters is to set them to NULL. However, my problem is that NULL is a legitimate update parameter value so I'm trying to figure out how to handle detect the difference between a NULL that is passed vs. a NULL that exists due to a missing optional parameter. One solution I've seen is to set the optional parameter's

问题 I have a SQL Server stored procedure that updates a large table. Because of its size, most parameters are optional. Most recommendations for setting the default of my optional parameters is to set them to NULL. However, my problem is that NULL is a legitimate update parameter value so I'm trying to figure out how to handle detect the difference between a NULL that is passed vs. a NULL that exists due to a missing optional parameter. One solution I've seen is to set the optional parameter's