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将 App Inventor 2 项目连接到外部传感器 · App Inventor 2 中文网

创建 Apps 首页 关于我们 关于我们 发布日志 服务条款 教育 中文教程 中文社区 反馈 我要反馈 将 App ...
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How can I create a copy of an object in Python?

I would like to create a copy of an object. I want the new object to possess all properties of the old object (values of the fields). But I want to have independent objects. So, if I change values of the fields of the new object, the old object should not be affected by that. ...
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Skip rows during csv import pandas

I'm trying to import a .csv file using pandas.read_csv() , however I don't want to import the 2nd row of the data file (the row with index = 1 for 0-indexing). ...
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How to loop backwards in python? [duplicate]

I'm talking about doing something like: 5 Answers 5 ...
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Mod of negative number is melting my brain

I'm trying to mod an integer to get an array position so that it will loop round. Doing i % arrayLength works fine for positive numbers but for negative numbers it all goes wrong. ...
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Where is Erlang used and why? [closed]

I would like to know a list of the most common application/websites/solutions where Erlang is used, successfully or not . ...
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How can I merge properties of two JavaScript objects dynamically?

I need to be able to merge two (very simple) JavaScript objects at runtime. For example I'd like to: 63 Answers ...
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How to add multi line comments in makefiles

Is there a way to comment out multiple lines in makefiles like as in C syntax /* */ ? 6 Answers ...
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Get ffmpeg information in friendly way

Every time I try to get some information about my video files with ffmpeg, it pukes a lot of useless information mixed with good things. ...
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How to use NULL or empty string in SQL

I would like to know how to use NULL and an empty string at the same time in a WHERE clause in SQL Server. I need to find records that have either null values or an empty string. Thanks. ...