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screen - Do I need 14 different layouts to support all Android devices?

I'm really feeling confused. From the docs at developer.android.com, it seems in order to keep my images ... - layout-xlarge layout-xlarge-land See Question&Answers more detail:os...

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

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jquery - Error handling in getJSON calls

How can you handle errors in a getJSON call? Im trying to reference a cross-domain script service using jsonp, ... you register an error method? See Question&Answers more detail:os...

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Python: most idiomatic way to convert None to empty string?

What is the most idiomatic way to do the following? def xstr(s): if s is None: return '' else: return s s = ... : return '' else: return str(s) 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 - Simplest way to detect a pinch

This is a WEB APP not a native app. Please no Objective-C NS commands. So I need to detect 'pinch' ... simple snippet that JUST detects pinch? 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 to draw text using only OpenGL methods?

I don't have the option to use but OpenGL methods (that is glxxx() methods). I need to draw text using gl ... is any other way to draw text? See Question&Answers more detail:os...

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

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ios - pod install -bash: pod: command not found

I installed pod some time ago. However, it's stopped working so I'm working through this again. However, ... Any suggestions why this happened? See Question&Answers more detail:os...

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javascript - Appending to an object

I have an object that holds alerts and some information about them: var alerts = { 1: { app: 'helloworld', ... the alert onto the alerts object? See Question&Answers more detail:os...

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c - What is the difference between memmove and memcpy?

What is the difference between memmove and memcpy? Which one do you usually use and how? See Question&Answers more detail:os...

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c# - Cleanest Way to Invoke Cross-Thread Events

I find that the .NET event model is such that I'll often be raising an event on one thread and listening for ... dirty work of my method here } See Question&Answers more detail:os...

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Extract black and white image from android camera's NV21 format

I have done some google-ing around and couldn't find enough information about this format. It is the default ... called YCbCr 420 Semi Planar See Question&Answers more detail:os...

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

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performance - atomic operation cost

What is the cost of the atomic operation (any of compare-and-swap or atomic add/decrement)? How much cycles ... x86_64, PowerPC, SPARC, Itanium. See Question&Answers more detail:os...

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cmd - How do you run a command as an administrator from the Windows command line?

I have a small script that performs the build and install process on Windows for a Bazaar repository I'm ... use of the graphical interface. See Question&Answers more detail:os...

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Rails 4 images not loading on heroku

I have spent the better part of the day trying to get images to load on my heroku app. Everything I try works ... ideas on what else to try? See Question&Answers more detail:os...

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c - What is the difference between a Linux platform driver and normal device driver?

Earlier I had assumed that : Platform driver is for those devices that are on chip. Normal device driver ... devices. Please somebody explain. 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 - Does async programming mean multi-threading?

lets talk about JavaScript code which has setInterval methods every 2 sec. I also have a onblur animation event ... threading language. So...? See Question&Answers more detail:os...

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visual studio 2017 - Assets file project.assets.json not found. Run a NuGet package restore

I'm trying to use nopCommerce(Which is written in .NET Core) but when I want to run the project I face 52 ... updated my VS2017 to 15.5.4 See Question&Answers more detail:os...

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

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bash - Linux/Unix command to determine if process is running?

I need a platform independent (Linux/Unix|OSX) shell/bash command that will determine if a specific process is ... way/command to do this? See Question&Answers more detail:os...

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Renaming column names of a DataFrame in Spark Scala

I am trying to convert all the headers / column names of a DataFrame in Spark-Scala. as of now I come up ... df.columns(i).toLowerCase ); } See Question&Answers more detail:os...

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C# vs C - Big performance difference

I'm finding massive performance differences between similar code in C and C#. The C code is: #include <stdio. ... , but this is acceptable. 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 Multithreading concept and join() method

I'm confused in join() method used in Threads in Java. In the following code: // Using join() to wait for ... to figure it out so please help. 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 - Watching memory usage in iOS

Is there any way to find out how much memory is available in iOS? I know that the system will pass low ... even guaranteed to work. Thanks! Ron See Question&Answers more detail:os...

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

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Specifying Maven's local repository location as a CLI parameter

Is it possible to set the location of the local Maven repository as argument on the Maven command line? The thing ... move my local repo to ~ See Question&Answers more detail:os...

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

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Scala: List[Future] to Future[List] disregarding failed futures

I'm looking for a way to convert an arbitrary length list of Futures to a Future of List. I'm using ... Thanks in advance for the help! 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 to loop over a Class attributes in Java?

How can I loop over a class attributes in java dynamically. For eg : public class MyClass{ private type1 att1; ... } is this possible in Java? 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 - Math.abs returns wrong value for Integer.Min_VALUE

This code: System.out.println(Math.abs(Integer.MIN_VALUE)); Returns -2147483648 Should it not return the absolute value as 2147483648 ? See Question&Answers more detail:os...

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

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linux - How to split CSV files as per number of rows specified?

I've CSV file (around 10,000 rows ; each row having 300 columns) stored on LINUX server. I want to ... linux command to help this conversion? 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 to insert selected columns from a CSV file to a MySQL database using LOAD DATA INFILE

I have a CSV file which contains 10 columns. I want to select only some columns from that file and load ... using the LOAD DATA INFILE command. See Question&Answers more detail:os...

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

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multithreading - Difference between the TPL & async/await (Thread handling)

Trying to understanding the difference between the TPL & async/await when it comes to thread creation. I believe ... essence, the UI thread. See Question&Answers more detail:os...

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

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