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EntityType has no key defined error

... { [Key] public int RollNo { get; set; } public string Name { get; set; } public string Stream { get; set; } public string Div { get; set; } } } share | ...
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How to format strings in Java

Primitive question, but how do I format strings like this: 8 Answers 8 ...
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Could not calculate build plan: Plugin org.apache.maven.plugins:maven-resources-plugin:2.5 or one of

...[Help 1] ... Had maven 3.0.5, eclipse Kepler with JBoss Dev Studio 7 installed. Computer sitting on internal network with proxy to the internet. Here's what I did. 0. Check the maven repositiory server is up 1. Check Proxy is set up and working First I thought it was a proxy problem, I made sur...
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How to convert hashmap to JSON object in Java

...cast hashmap to JSON object in Java, and again convert JSON object to JSON string? 29 Answers ...
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In C#, how do I calculate someone's age based on a DateTime type birthday?

...Drop the last 4 digits = 28. C# Code: int now = int.Parse(DateTime.Now.ToString("yyyyMMdd")); int dob = int.Parse(dateOfBirth.ToString("yyyyMMdd")); int age = (now - dob) / 10000; Or alternatively without all the type conversion in the form of an extension method. Error checking omitted: public...
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How can I read numeric strings in Excel cells as string (not numbers)?

What can I do to read the value as string? 20 Answers 20 ...
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Rerender view on browser resize with React

...lobals window */ import React, { useState, useEffect } from 'react' import _debounce from 'lodash.debounce' const Example = () => { const [width, setWidth] = useState(window.innerWidth) useEffect(() => { const handleResize = _debounce(() => setWidth(window.innerWidth), 100) w...
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Looping a video with AVFoundation AVPlayer?

...g movie duration longer than audio/video tracks is the problem. FigPlayer_File is disabling gapless transition because audio track edit is shorter than the movie duration (15.682 vs 15.787). You need to either fix the movie files to have the movie duration and track durations to be same...
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C# DateTime to “YYYYMMDDHHMMSS” format

... DateTime.Now.ToString("yyyyMMddHHmmss"); // case sensitive share | improve this answer | follow | ...
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Where am I wrong about my project and these Javascript Frameworks?

... Which of the frameworks you've tried have you taken for a spin? Personally, I got into ExtJS development because the projects I work on require a lot of customization of controls/widgets. ExtJS has a ton of them right out of the box and can always be extended, combined, or munged into whatever...