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ruby - Rails.cache error in Rails 3.1 - TypeError: can't dump hash with default proc

I running into an issue with the Rails.cache methods on 3.1.0.rc4 (ruby 1.9.2p180 (2011-02-18 revision ... . Any suggestions? Thanks in advance! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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On Android, how do you switch activities programmatically?

It seems like every example I can find of switching between activities involves creating an Intent and ... an associated OnClickListener? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - Check if a SQL table exists

What's the best way to check if a table exists in a Sql database in a database independant way? I came ... nothing that works for all databases. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - Making golang Gorilla CORS handler work

I have fairly simple setup here as described in the code below. But I am not able to get the CORS to work. I ... ", handlers.CORS()(router))) } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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api - Can't create pdf using python PDFKIT Error : " No wkhtmltopdf executable found:"

I tried installing pdfkit Python API in my windows 8 machine. I'm getting issues related to path. Traceback (most ... google.com', 'out.pdf') See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Conflicting boolean values of an empty JavaScript array

Can anyone explain why the following two statements both evaluate as true? [] == false and !![] This question is ... test if an array is empty. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - View not updating after post

I have a controller method CreateOrUpdate, this method is supposed to save the car to the database and then ... if the save was successful. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - In Oracle, is it possible to INSERT or UPDATE a record through a view?

In Oracle, is it possible to INSERT or UPDATE a record (a row) through a view? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - using statement FileStream and / or StreamReader - Visual Studio 2012 Warnings

The new Visual Studio 2012 is complaining about a common code combination I have always used. I know it ... combination directly. Thank you! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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angularjs - Telling Angular Js to ignore a specific route

I have set up my routing in Angular and all works fine: $locationProvider.html5Mode(true); $routeProvider. when('/', ... hacky way to do it. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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iphone - Black screen instead of launch image on iPad

I am developing an iPhone app for iOS 6.1 and 7 (using Xcode 5). I have a problem with iPad launch images ... Asset Catalog. What am I missing? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Changing an input's HTML5 placeholder color with CSS does not work on Chrome

I tried to follow the following topic, but unsuccessfully. Change an HTML5 input's placeholder color with CSS I tried to ... 0.2, it works well. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - Multiple Authorization attributes on method

I'm having trouble specifying two separate Authorization attributes on a class method: the user is to be allowed access ... to be run in MVC2. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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css - Firefox -moz-border-radius won't crop out image?

Does anyone know a way to get Firefox to crop the corners if the border radius of an image is set? It's ... before I put it on my site? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - How to get a slice from "arguments"

All you know that arguments is a special object that holds all the arguments passed to the function. And as long ... line above as an answer. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How do I check if a zero is positive or negative?

Is it possible to check if a float is a positive zero (0.0) or a negative zero (-0.0)? I've converted the ... '-', but are there any other ways? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Android Studio and android.support.v4.app.Fragment: cannot resolve symbol

I am tryng out Android Studio instead of Eclipse. I install it and then start a completely new project and follow ... am I missing? Thanks =) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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How do I pattern match arrays in Scala?

My method definition looks as follows def processLine(tokens: Array[String]) = tokens match { // ... Suppose I ... do I go about doing this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - How generate unique Integers based on GUIDs

Is it possible to generate (highly probable) unique Integer from GUIDs? int i = Guid.NewGuid().GetHashCode(); int j ... 0); Which one is better? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ubuntu - apt-get update' returned a non-zero code: 100

I am trying to create a docker image from my docker file which has the following content: FROM ubuntu:14.04.4 ... I dont know whats wrong here. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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306 views

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javascript - Animating backgroundColor in React Native

How would I go about animating from one color to another in React Native. I've found that by interpolating an ... from one color to another? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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799 views

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c++11 - C++ local variable destruction order

Is there a defined order in which local variables are deallocated in C++ (11) ? To be more concise: In which ... the order undefined in C++11? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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flutter - How to fix HttpException: Connection closed before full header was received

I have recently upgraded my flutter version in my app. But when I want to debug the application, it shows ... any workaround, please share. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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272 views

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Does the order of headers in an HTTP response ever matter?

Is it ever meaningful whether the order of headers is A: 1 B: 2 vs B:2 A:1 I'm trying to figure ... some kind of list or ordered dictionary. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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SASS CSS: Target Parent Class from Child

I am using SASS and found an inconvenience. This is an example of what I am trying to do: .message- ... all .message-error definitions. Thanks. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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248 views

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How to access plain json body in Spring rest controller?

Having the following code: @RequestMapping(value = "/greeting", method = POST, consumes = APPLICATION_JSON_VALUE, produces ... is an easier way? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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344 views

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How to 'foreach' a column in a DataTable using C#?

How do I loop through each column in a datarow using foreach? DataTable dtTable = new DataTable(); MySQLProcessor. ... DataColumn dc in dtRow) } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Uncaught Error: Cannot find module 'jquery'

I am using Electron to make a desktop app. In my app I am loading a an external site (outside Atom ... electron app with node-integration true. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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