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What is the difference between Amazon SNS and Amazon SQS?
...sages are NOT pushed to receivers. Receivers have to poll or pull messages from SQS. Messages can't be received by multiple receivers at the same time. Any one receiver can receive a message, process and delete it. Other receivers do not receive the same message later. Polling inherently introduces ...
How to update SQLAlchemy row entry?
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stackoverflow.com/a/2334917/125507 says this is a bad way to do it. Also what if the row doesn't exist yet?
– endolith
Aug 2 '14 at 18:13
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How do I contribute to other's code in GitHub? [closed]
...orked a project, you can develop in any branch you want (a new one, or one from the original project)
Remember to:
add the original project as a remote (different form 'origin', since origin would be your own repo, result of the fork)
rebase your branch on top of the branch of the original repo y...
How can I explicitly free memory in Python?
...'m using python 3.6. Calling gc.collect() after loading a pandas dataframe from hdf5 (500k rows) reduced memory usage from 1.7GB to 500MB
– John
Jan 18 '18 at 20:30
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Is the “struct hack” technically undefined behavior?
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edited Sep 14 '10 at 17:24
answered Sep 14 '10 at 17:18
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How to decide when to use Node.js?
...ited for applications where you'd like to maintain a persistent connection from the browser back to the server. Using a technique known as "long-polling", you can write an application that sends updates to the user in real time. Doing long polling on many of the web's giants, like Ruby on Rails or D...
App Inventor 2 TaifunImage 拓展，图像高级处理功能，剪裁，压缩，翻转等 ...
...谢Tanja赞助此功能块！
将ASD中的jpg图像文件顺时针旋转0、90、180或270度。
感谢teen-code.com的慷慨捐赠！
裁剪图像。输入左、上、右、下的像素距离。
感谢Husain赞助此功能块！
将ASD中的jpg图像文件分割成多个块。
例...
滚动布局管理器拓展 - ScrollArrangementHandler · App Inventor 2 中文网
...动动画样式 数值
设置过度滚动的动画样式：
0 - 总是允许过度滚动
1（默认） - 当布局可以被有效滚动时才允许过度滚动
2 - 禁止过度滚动
（在不同版本的系统中过度滚动动画看起来可能会不太一样）
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AngularJS: How can I pass variables between controllers?
... and I was very frustrated. So let me help you avoid this trouble.
I read from the "ng-book: The complete book on AngularJS" that AngularJS ng-models that are created in controllers as bare-data are WRONG!
A $scope element should be created like this:
angular.module('myApp', [])
.controller('Some...
How do I prevent Eclipse from hanging on startup?
...oned on the other answer did not. I didn't seem to lose anything critical from my workspace by deleting this file.
– User1
Feb 16 '11 at 15:48
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