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App Inventor 2 字典 vs 列表：同样存数据，性能差了10倍？ - App应用开发 ...
...<a href="https://www.fun123.cn/reference/blocks/dictionaries.html" target="_blank">https://www.fun123.cn/reference/blocks/dictionaries.html</a><br>- 列表积木文档：<a href="https://www.fun123.cn/reference/blocks/lists.html" target="_blank">https://www.fun123.cn/reference/blocks/lists.html</a><...
Are the PUT, DELETE, HEAD, etc methods available in most web browsers?
...ere's the bug if you want to follow along at home: w3.org/Bugs/Public/show_bug.cgi?id=10671
– Emil Lerch
Oct 21 '11 at 17:43
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show 12 more...
Is there any publicly accessible JSON data source to test with real world data? [closed]
..., for example -
A GET request to:
https://api.twitter.com/1/statuses/user_timeline.json?include_entities=true&include_rts=true&screen_name=mralexgray&count=1,
EDIT: Removed due to twitter restricting their API with OAUTH requirements...
{"errors": [{"message": "The Twitter REST API...
MySQL - How to select data by string length
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select * from table order by length(column);
Documentation on the length() function, as well as all the other string functions, is available here.
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Why this line xmlns:android=“http://schemas.android.com/apk/res/android” must be the first in the la
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This is just the XML Name Space declaration. We use this Name Space in order to specify that the attributes listed below, belongs to Android. Thus they starts with "android:"
You can actually create your own custom attributes. So to prevent the name conflicts where 2 attributes are named the sa...
Lock-free multi-threading is for real threading experts
...n't it?
Most of the fun however can come from ensuring correct load/store ordering.
Contrary to one's intuitions, CPUs are free to reorder memory reads/writes - they are very smart, by the way: you will have a hard time observing this from a single thread. You will, however run into issues when you...
Anaconda vs. EPD Enthought vs. manual installation of Python [closed]
... old and we were unable to update becasue of the weird proxy situation. In order to add some packages (such as recent version of xlrd/xlwt), I compiled from source. To update SciPy and NumPy, I used the precompiled installer from http://www.lfd.uci.edu/~gohlke/pythonlibs/, but it would sometimes scr...
What does the exclamation mark do before the function?
...iling semicolon, and yet that will give the flexibility to put them in any order with no worry.
!function abc(){}();
!function bca(){}();
Will work the same as
!function abc(){}();
(function bca(){})();
but saves one character and arbitrary looks better.
And by the way any of +,-,~,void opera...
How do I declare a namespace in JavaScript?
...o safely add to the same namespace when they don't know in advance in what order they will execute. This can be helpful either if you want to be able to reorder your script inclusions arbitrarily without breaking your code, or if you want to load scripts asynchronously with the async attribute and s...
How to know/change current directory in Python shell?
...now how to change.
edit
Under Windows:
set PYTHONPATH=%PYTHONPATH%;C:\My_python_lib
(taken from http://docs.python.org/using/windows.html)
edit 2
... and even better: use virtualenv and virtualenv_wrapper, this will allow you to create a development environment where you can add module paths ...