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App Inventor 2 扩展开发实战：从Java小白到发布第一个.aix自定义插件 - Ap...
...是最大门槛，但只需要做一次。
# 1. 克隆仓库
git clone https://github.com/mit-cml/appinventor-sources.git
cd appinventor-sources
# 2. 确认依赖
# 需要 JDK 8、ant、Python 2.7（或3.x兼容模式）
java -version
# 3. 编译核心库
ant MakeExtensions
国内...
Chrome: timeouts/interval suspended in background tabs?
...b noise, -60db doesn't work)
I play them, on user-demand, with Howler.js: https://github.com/goldfire/howler.js
function performance_trick()
{
if(sounds.empty) return sounds.empty.play();
sounds.empty = new Howl({
src: ['/sounds/loops/empty_loop_for_js_performance.ogg','/sounds/loo...
iOS: how to perform a HTTP POST request?
...
I'd highly recommend using the ASIHTTPRequest library if you are handling HTTPS. Even without https it provides a really nice wrapper for stuff like this and whilst it's not hard to do yourself over plain http, I just think the library is nice and a great way to get started.
The HTTPS complication...
Pull request vs Merge request
...assignee. In this article we’ll refer to them as merge requests.
-- https://about.gitlab.com/2014/09/29/gitlab-flow/
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How to run cron job every 2 hours
...
0 */2 * * *
The answer is from https://crontab.guru/every-2-hours. It is interesting.
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AngularJS - Access to child scope
... property, not the other way around.
Check Vojta's comments on the issue https://groups.google.com/d/msg/angular/LDNz_TQQiNE/ygYrSvdI0A0J
In a nutshell: You cannot access child scopes from a parent scope.
Your solutions:
Define properties in parents and access them from children (read the lin...
Printing Lists as Tabular Data
...are some light and useful python packages for this purpose:
1. tabulate: https://pypi.python.org/pypi/tabulate
from tabulate import tabulate
print(tabulate([['Alice', 24], ['Bob', 19]], headers=['Name', 'Age']))
Name Age
------ -----
Alice 24
Bob 19
tabulate has many options...
Refused to display in a frame because it set 'X-Frame-Options' to 'SAMEORIGIN'
..."v/" so a full URL would become: <iframe width='1080' height='760' src="https://www.youtube.com/embed/dQw4w9WgXcQ" frameborder="0" allowfullscreen></iframe>
– backwardm
Aug 5 '15 at 20:28
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How to extract a git subdirectory and make a submodule out of it?
...To install git-subtree from source (for older versions of git):
git clone https://github.com/apenwarr/git-subtree.git
cd git-subtree
sudo rsync -a ./git-subtree.sh /usr/local/bin/git-subtree
Or if you want the man pages and all
make doc
make install
Usage
Split a larger into smaller chunks:
...
How to step through Python code to help debug issues?
...se commands should be execute from **pdb
For in-depth knowledge, refer:-
https://pymotw.com/2/pdb/
https://pythonconquerstheuniverse.wordpress.com/2009/09/10/debugging-in-python/
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