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CGContextDrawImage draws image upside down when passed UIImage.CGImage
...
Relevant Quartz2D docs: https://developer.apple.com/library/ios/documentation/2DDrawing/Conceptual/DrawingPrintingiOS/GraphicsDrawingOverview/GraphicsDrawingOverview.html#//apple_ref/doc/uid/TP40010156-CH14-SW4
Flipping the Default Coordinate Sy...
AngularJs: How to check for changes in file input fields?
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No binding support for File Upload control
https://github.com/angular/angular.js/issues/1375
<div ng-controller="form-cntlr">
<form>
<button ng-click="selectFile()">Upload Your File</button>
<input type=...
NodeJS require a global module/package
...m install -g ...) or modules required by npm (listed as dependencies here: https://github.com/npm/npm/blob/master/package.json). If you are using a newer version of NPM, it may find dependencies of other globally installed packages since there is a flatter structure for node_modules folders now.
H...
Group by multiple columns in dplyr, using string vector input
...dplyr has full support for string arguments, perhaps this gist is useful:
https://gist.github.com/skranz/9681509
It contains bunch of wrapper functions like s_group_by, s_mutate, s_filter, etc that use string arguments. You can mix them with the normal dplyr functions. For example
cols = c("cyl",...
How can I print a circular structure in a JSON-like format?
... require('circular-json');
...
const json = CircularJSON.stringify(obj);
https://github.com/WebReflection/circular-json
NOTE: I have nothing to do with this package. But I do use it for this.
Update 2020
Please note CircularJSON is in maintenance only and flatted is its successor.
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adb server version doesn't match this client
.../usr/bin”
# adb version
Android Debug Bridge version 1.0.31
# wget -O - https://skia.googlesource.com/skia/+archive/cd048d18e0b81338c1a04b9749a00444597df394/platform_tools/android/bin/linux.tar.gz | tar -zxvf - adb
# sudo mv adb /usr/bin/adb
# sudo chmod +x /usr/bin/adb
# adb version
Android Debu...
How to calculate the angle between a line and the horizontal axis?
..., "expecting angle to be pi/2, it is: " + str(angle)
All tests pass. See https://en.wikipedia.org/wiki/Unit_circle
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DaffyMenu 扩展：弹出菜单扩展，为组件添加弹出式菜单功能 · App Inventor 2 中文网
...息
原作者：Gordon Lu (gordonlu310)
原始网址：https://community.appinventor.mit.edu/t/free-daffymenu-popup-menus-for-your-components/54771/12
发布日期：2022年3月31日
许可协议：免费开源扩展
致谢：感谢 AI2 Popup Menu 提供的灵感
文档最...
How to change the remote repository for a git submodule?
...es on local repository
git config --file=.gitmodules submodule.Submod.url https://github.com/username/ABC.git
git config --file=.gitmodules submodule.Submod.branch Development
git submodule sync
git submodule update --init --recursive --remote
Please look at the blog for screenshots: Changing GIT...
Configure IIS Express for external access to VS2010 project
...d it through the Tools->Extensions... menu in VS or on the gallery site https://visualstudiogallery.msdn.microsoft.com/a429dbb7-a982-4541-b401-934375c02c0f?SRC=Home
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