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path - Ruby loading config (yaml) file in same dir as source

in HOME/path_test/ I have: load_test.rb: require 'yaml' cnf = YAML::load(File.open('config.yml')) puts cnf ... questions/8878389/ruby-loading-config-yaml-file-in-same-dir-as-source...

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

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postgresql - Django model: NULLable field

I'm working on a django project where I need a DateField to sometimes be empty. My model looks like ... :https://stackoverflow.com/questions/16046478/django-model-nullable-field...

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

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php - Laravel Eloquent sort by relation table column

I tried to sort products from shop_products table by pinned column from shop_products_options table: $products = ... /23530051/laravel-eloquent-sort-by-relation-table-column...

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

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java - No property found for type error when try to create custom repository with Spring Data JPA

I have a Media entity that has some basic fields for files uploaded by the user. For saving the bytes of the ... -for-type-error-when-try-to-create-custom-repository-with-sprin...

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

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c# - Make foregroundcolor black or white depending on background

Something like calculating the average value of rgb components and then decide whether to use black or white ... 2241447/make-foregroundcolor-black-or-white-depending-on-background...

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python - Spark DataFrame TimestampType - how to get Year, Month, Day values from field?

I have Spark DataFrame with take(5) top rows as follows: [Row(date=datetime.datetime(1984, 1, 1, 0, 0) ... spark-dataframe-timestamptype-how-to-get-year-month-day-values-from-field...

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How to catch event with hardware back button on android?

How to catch event with hardware back button on android ? I need to supress user to go back and I when click ... /8094715/how-to-catch-event-with-hardware-back-button-on-android...

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spring - No adapter for handler exception

I'm developing a web application using spring mvc framework. I want to to both annotation and beanName ... //stackoverflow.com/questions/3896013/no-adapter-for-handler-exception...

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How to embed new Youtube's live video permanent URL?

I stream live on youtube a lot and since yesterday I experience a weird thing: I embedded the livestream URL ... /39275889/how-to-embed-new-youtubes-live-video-permanent-url...

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

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c++ - Interview Question

I was asked the output of the following code in my interview yesterday #include <stdio.h> int main( ... question from:https://stackoverflow.com/questions/4269838/interview-question...

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python - How to import .py file from another directory?

(This question already has answers here): question from:https://stackoverflow.com/questions/22955684/how-to-import-py-file-from-another-directory...

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reporting services - SSRS How to repeat the table header on each page in print preview

I have an SSRS report, for some reason the header is not repeating on all of the pages in the print preview mode. ... -how-to-repeat-the-table-header-on-each-page-in-print-preview...

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delphi - How to detect true Windows version?

I know I can call the GetVersionEx Win32 API function to retrieve Windows version. In most cases returned ... stackoverflow.com/questions/57124/how-to-detect-true-windows-version...

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How to locate leaflet zoom control in a desired position

I want to place the zoom control in middle right of the the map i.e. in the middle of the right most ... questions/33614912/how-to-locate-leaflet-zoom-control-in-a-desired-position...

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

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java - Why does Runtime.exec(String) work for some but not all commands?

When I try to run Runtime.exec(String), certain commands work, while other commands are executed but fail or do ... /why-does-runtime-execstring-work-for-some-but-not-all-commands...

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javascript - How do I automatically play a Youtube video (IFrame API) muted?

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javascript - AngularJs - Best-Practices on adding an active class on click (ng-repeat)

I want to add an active class on click in a list, i tried the following code, but it adds the active class ... angularjs-best-practices-on-adding-an-active-class-on-click-ng-repeat...

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

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javascript - Chrome-extension: Append functions to right click menu

How would I append functions to the right click menu in the browser? E.g something appended to the ... /questions/5193350/chrome-extension-append-functions-to-right-click-menu...

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javascript - How can I copy to clipboard in HTML5 without using flash?

I want to use a copy-to-clipboard function in HTML5, but without using flash. Is it possible? How? I tried to ... /26336138/how-can-i-copy-to-clipboard-in-html5-without-using-flash...

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

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http - Share a cookie between two websites

I have built a website (A) which logs in to and retrieves customer data from a separate web service. ... //stackoverflow.com/questions/12370495/share-a-cookie-between-two-websites...

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versioning - Why do I get "fatal: git status --porcelain failed"?

This is a huge pain in the bum. I've got this a few times before and I don't understand why. 5 mins ... .com/questions/5456683/why-do-i-get-fatal-git-status-porcelain-failed...

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functional programming - Monad equivalent in Ruby

What would an equivalent construct of a monad be in Ruby? question from:https://stackoverflow.com/questions/2709361/monad-equivalent-in-ruby...

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In bash, can you use a function call as a condition in an if statement?

here's what i'm trying to achive: function f1() { return 0 } function f2() { return 0 } if [[ f1 && f2 ]]; ... in-bash-can-you-use-a-function-call-as-a-condition-in-an-if-statement...

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Render a string as HTML in C# Razor

I am attempting to render an address from my model. The string contains line breaks that I am replacing with a ... /questions/27284734/render-a-string-as-html-in-c-sharp-razor...

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

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Moving Eclipse Workspace from ~ to new directory?

Okay, so I made a mistake of setting my home directory (~, a.k.a. /home/user) to be my ... //stackoverflow.com/questions/15165135/moving-eclipse-workspace-from-to-new-directory...

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

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What is the symbol for whitespace in C?

I am trying to figure out how to check if a character is equal to white-space in C. I know that tabs ... stackoverflow.com/questions/30033582/what-is-the-symbol-for-whitespace-in-c...

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How to get the excel file name / path in VBA

Say, I'm writing a VBA inside my excel file sample.xls. Now I want to get the full path of sample.xls in my ... .com/questions/1895616/how-to-get-the-excel-file-name-path-in-vba...

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

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python - USING LIKE inside pandas.query()

I have been using Pandas for more than 3 months and I have an fair idea about the dataframes accessing ... ://stackoverflow.com/questions/31391275/using-like-inside-pandas-query...

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

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