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使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...etecting rotation gestures. You can download the apk file of the demo app from here. The demo app simply illustrates how to use the RotationDetector component to rotate an ImageSprite on canvas. The Designer view and block view of this demo app are shown below.
Here’s how to implement the r...
Max retries exceeded with URL in requests
...at itunes server refuses your connection (you're sending too many requests from same ip address in short period of time)
Max retries exceeded with url: /in/app/adobe-reader/id469337564?mt=8
error trace is misleading it should be something like "No connection could be made because the target m...
Is there a difference between PhoneGap and Cordova commands?
...Mapping:
'local' => cordova-cli
'remote' => PhoneGap/Build
Also from following repository:
Modules which requires cordova are:
build
create
install
local install
local plugin add , list , remove
run
mode
platform update
run
Which dont include cordova:
remote build
remote install
remot...
windows service vs scheduled task
...recommend you separate out your processing code into a different component from the console app or Windows Service. Then you have the choice, either to call the worker process from a console application and hook it into Windows Scheduler, or use a Windows Service.
You'll find that scheduling a Wind...
Automapper: Update property values without creating a new object
...
Thanks, Jimmy...I purposely stayed away from AutoMapper because I was afraid of the learning curve impacting my schedule. I'm officially sorry I stayed away so long...it's much easier than I initially thought.
– Neil T.
Apr 8 ...
Set encoding and fileencoding to utf-8 in Vim
... both in your ~/.vimrc if you always want to work in utf-8.
More details
From the wiki of VIM about working with unicode
"encoding sets how vim shall represent characters internally. Utf-8 is necessary for most flavors of Unicode."
"fileencoding sets the encoding for a particular file (local to ...
Load multiple packages at once
...dplyr, psych, tm)
and if the package is missing p_load will download it from CRAN or Bioconductor.
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unix domain socket VS named pipes?
...i-directional but half-duplex. This means that communication may go either from end A to end B, or B to A, but never both at the same time.
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Generating PDF files with JavaScript
I’m trying to convert XML data into PDF files from a web page and I was hoping I could do this entirely within JavaScript. I need to be able to draw text, images and simple shapes. I would love to be able to do this entirely in the browser.
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Merge 2 arrays of objects
...o keep up to date.
The source (arr2) array is where the new data is coming from, and we want it merged into our target array.
We loop over the source array looking for new data, and for every object that is not yet found in our target array we simply add that object using target.push(sourceElement)
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