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云数据及Firebase组件简介 · App Inventor 2 中文网
...访问。 此外，如果其他开发人员使用您的应用程序源代码（AIA 文件），生成的应用程序将不会与您的应用程序共享变量，即使这两个应用程序具有相同的名称。
您还可以指定 valueIfTagNotThere，如果给定标签下没有存储任何内容...
界面布局组件 · App Inventor 2 中文网
...路 在线 客服 扫码添加客服咨询 我要 分享 扫码分享到朋友圈 顶部 var qrcode = new QRCode("qrcode", { text: window.location.href + "?f=share", //...
Which mime type should I use for mp3
...riation of a mime type for a specific file. I was trying to upload mp3 and zip files with open source php class, that what I have found:
Firefox (mp3): audio/mpeg
Firefox (zip): application/zip
Chrome (mp3): audio/mp3
Chrome (zip): application/octet-stream
Opera (mp3): audio/mp3
Opera (zip):...
Pandas: create two new columns in a dataframe with values calculated from a pre-existing column
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I'd just use zip:
In [1]: from pandas import *
In [2]: def calculate(x):
...: return x*2, x*3
...:
In [3]: df = DataFrame({'a': [1,2,3], 'b': [2,3,4]})
In [4]: df
Out[4]:
a b
0 1 2
1 2 3
2 3 4
In [5]: df["A1"], ...
Convert a list to a dictionary in Python
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b = dict(zip(a[::2], a[1::2]))
If a is large, you will probably want to do something like the following, which doesn't make any temporary lists like the above.
from itertools import izip
i = iter(a)
b = dict(izip(i, i))
In Python...
云数据及Firebase组件简介 · App Inventor 2 中文网
...访问。 此外，如果其他开发人员使用您的应用程序源代码（AIA 文件），生成的应用程序将不会与您的应用程序共享变量，即使这两个应用程序具有相同的名称。
您还可以指定 valueIfTagNotThere，如果给定标签下没有存储任何内容...
Is there a quick way to delete a file from a Jar / war without having to extract the jar and recreat
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zip -d file.jar unwanted_file.txt
jar is just a zip file after all. Definitely much faster than uncompressing/recompressing.
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Download multiple files with a single action
...(this would be done with JavaScript)
preferred solution create a script to zip the files
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Transposing a 2D-array in JavaScript
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You could use underscore.js
_.zip.apply(_, [[1,2,3], [1,2,3], [1,2,3]])
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How to parse freeform street/postal address out of text, and into components
... also contains a street address (with secondary/unit number) and a 5-digit ZIP code, which is enough to identify an address.
Number 3 is a complete post office box format, as it contains a ZIP code.
Number 4 is also complete because the ZIP code is unique, meaning that a private entity or corporat...