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postgresql - MIN function in SQL not working as expected

I have a table that lists players of a game and the history of their level changes within the game (beginner, ... com/questions/65904853/min-function-in-sql-not-working-as-expected...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ruby - Why does simple form not show validation error messages in Rails?

The :new view when redirected if validations are not matched and where I'd like to see the error messages: <%= ... /why-does-simple-form-not-show-validation-error-messages-in-rails...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - TypeScript/Knex: Cannot use import statement outside a module

I'm a newbie to TypeScript and currently using Knex to build a template table in our PostgreSQL database. ... 65883600/typescript-knex-cannot-use-import-statement-outside-a-module...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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intellij idea - Java beginner; errors after copying simple sample code? Is my configuration messed up?

I am one week into learning Java. Suddenly, I have a problem with red squigglies on the line where function ... -errors-after-copying-simple-sample-code-is-my-configuration-mess...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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postgresql - Rails PG::UniqueViolation: ERROR: duplicate key value violates unique constraint "table_pkey"

I created something like a JSON backup for my project's database, and then I populate it like ... /rails-pguniqueviolation-error-duplicate-key-value-violates-unique-constraint...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Creating Loops in Pandas

I am trying to turn this into a loop variable to save space but unsure what I am doing wrong- This ... from:https://stackoverflow.com/questions/65924951/creating-loops-in-pandas...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How to match use Fuzz with array input

I want to try to get match values from the two arrays I input. I use Fuzzy for that. but I still can ... stackoverflow.com/questions/65839889/how-to-match-use-fuzz-with-array-input...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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reactjs - Data obtained from Firebase Realtime Database in React Native using Hooks is not displayed on the screen

I started using Hooks in React Native recently and I'm trying to get the data from Firebase Realtime Database and ... -firebase-realtime-database-in-react-native-using-hooks-is-not...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - is the locked object of synchronized wrong?

public class UnsafeCol implements Runnable{ List<String> list = new ArrayList<>(); @Override public void run() ... com/questions/65842557/is-the-locked-object-of-synchronized-wrong...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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arrays - Algorithm for Number series row and column

I am trying to create a simple Algorithm in Dart but I think the programming language doesn't matter it is ... .com/questions/65847415/algorithm-for-number-series-row-and-column...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Php + mysql - connection dies consistantly after 66,946 chars of query input

I've been trying to debug a randomly dropping mysql connection in my php project. Things I've discovered so ... -connection-dies-consistantly-after-66-946-chars-of-query-input...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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How to get only specific attributes with from Laravel Collection?

How can I get all specific IDs from the collection in Laravel 8 ?? I'm trying to get food_item_id from ... 65934311/how-to-get-only-specific-attributes-with-from-laravel-collection...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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flutter - empty form text filed

I'm using a FormTextField in a Flutter app To update a certain column value, the user types in the ... from:https://stackoverflow.com/questions/65557318/empty-form-text-filed...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ruby on rails - How to call a .html.erb file inside another .html.erb file

I have a structure which looks like below where-in I need to call a .html.erb file in another. main_layout.html.erb < ... /how-to-call-a-html-erb-file-inside-another-html-erb-file...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How to get the SHAP values of each feature?

I am currently working with the SHAP library, I already generated my charts with the avg contribution of each feature, ... /65837159/how-to-get-the-shap-values-of-each-feature...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Illustrating Normal Distribution using Numpy, Matploblib 3D from MATLAB code

I am trying to plot normal distribution in 3D. I have a code written in MATLAB, but I have been ... /illustrating-normal-distribution-using-numpy-matploblib-3d-from-matlab-code...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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php - Will time() ever return the same output?

I am generating tokens for users in PHP when they register. I am wondering if two users could ever get the same ... /will-this-function-i-made-return-a-unique-string-every-time...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Singly linked list program error while using malloc function(updated one)

I am having trouble inserting the second element the program just waits and exits, the first element is ... singly-linked-list-program-error-while-using-malloc-functionupdated-one...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - int* array to short* array conversion

This question might be silly for you guys, but I am new in C. I need to convert my int* array ... https://stackoverflow.com/questions/65866700/int-array-to-short-array-conversion...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Using re.sub to manipulate pandas df column with stored constraints **V HELPFUL**

This problem took me a while to figure out, and there were only bits a pieces on stack overflow so I ... -sub-to-manipulate-pandas-df-column-with-stored-constraints-v-helpful...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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automation - Python script to search for a file using partial name in a set of folders and sort them into a new folder structure

I am trying out python scripting for automation for the first time. I had a set of files in a particular folder structure ... -a-file-using-partial-name-in-a-set-of-folders-and-so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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PL/SQL ORACLE ERROR : PLS-00225 in my Code

I know that there are already other posts on this subject, but I can't find a way to make it work. Can someone ... .com/questions/65875757/pl-sql-oracle-error-pls-00225-in-my-code...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How can I located element in selenium using the following element?

I am trying to find the following element in selenium It is a user name input field and I use: loginLink = ... /how-can-i-located-element-in-selenium-using-the-following-element...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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How to implement fast-forward functionality for an audio player using JavaScript

I'm trying to implement fast-forward in my app. I've added an event listener to the fast-forward ... to-implement-fast-forward-functionality-for-an-audio-player-using-javascript...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Removing every other word from an array (passage of text)

I have been very stuck on a bonus task from a tutorial, which is to remove every other word (contained in the ... /65875625/removing-every-other-word-from-an-array-passage-of-text...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - ValueError: could not convert string to float: 'Bad'

import pandas as pd import numpy as np import matplotlib.pyplot as plt from sklearn.model_selection import ... 65600549/valueerror-could-not-convert-string-to-float-bad...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Run multiple audio in sequence one by one in loop in swift

I want to run multiple audios in a loop. So I want to stop the execution of loop until the completion of running ... /run-multiple-audio-in-sequence-one-by-one-in-loop-in-swift...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Implementation of stack <array<string, 100>>

I have been learning C++ for a couple of weeks now and started making my game where I pumped ... ://stackoverflow.com/questions/65877310/implementation-of-stack-arraystring-100...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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