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实时开发、测试和调试工具 · App Inventor 2 中文网
...所有区块都会在菜单中提供相同的选择。
你可以使用 Do It 执行块的操作。 在调试像 MoleMash 这样的程序时，你可以选择“MoveMole”中的“Do It”，然后查看摩尔是否在手机上移动。
Do It 不仅会执行块的操作，还会弹出一个气球...
Difference between 'self' and 'total' in Chrome CPU Profile of JS
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total is how much time was spent in that function, and in the functions it called.
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pandas GroupBy columns with NaN (missing) values
I have a DataFrame with many missing values in columns which I wish to groupby:
9 Answers
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How do you represent a JSON array of strings?
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I'll elaborate a bit more on ChrisR awesome answer and bring images from his awesome reference.
A valid JSON always starts with either curly braces { or square brackets [, nothing else.
{ will start an object:
{ "key": value, "another key": v...
Fit cell width to content
...ng markup, how could I use CSS to force one cell (all cells in column) to fit to the width of the content within it rather than stretch (which is the default behaviour)?
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Is it possible to select the last n items with nth-child?
Using a standard list, I'm trying to select the last 2 list items. I've various permutations of An+B but nothing seems to select the last 2:
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Add a space (“ ”) after an element using :after
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Explanation
It's worth noting that your code does insert a space
h2::after {
content: " ";
}
However, it's immediately removed.
From Anonymous inline boxes,
White space content that would subsequently be collapsed away
accord...
Update git commit author date when amending
I found myself amending my commits quite often. I don't stash so much because I tend to forget I did so, especially when I want to save what I did before I leave or before a weekend, so I do a "draft" commit. Only thing is, when I amend the commit, it is still set to the original author date. Is t...
Cannot kill Python script with Ctrl-C
I am testing Python threading with the following script:
4 Answers
4
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asp.net mvc put controllers into a separate project
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First of all, it is certainly a good idea to put your model into a separate project. As you've discovered, this is trivial.
Regarding Controllers and Views, I don't see any obvious advantage to separating them for most basic projects, alt...