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Colspan all columns
...rking-as-expected one :( I think it doesn't deserve more upvotes than the accepted answer =/
– Francisco
Dec 28 '11 at 15:07
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Flatten nested dictionaries, compressing keys
...does the key-reducer function (which I hereby refer to as 'join') require access to the entire key-path, or can it just do O(1) work at every node in the tree? If you want to be able to say joinedKey = '_'.join(*keys), that will cost you O(N^2) running time. However if you're willing to say nextKey ...
What is the difference between map and flatMap and a good use case for each?
...g from a collection of lines to a collection of words looks like:
["aa bb cc", "", "dd"] => [["aa","bb","cc"],[],["dd"]] => ["aa","bb","cc","dd"]
The input and output RDDs will therefore typically be of different sizes for flatMap.
If we had tried to use map with our split function, we'd h...
上班狗来算算 你离财务自由还差多少钱？ - 杂谈 - 清泛网 - 专注C/C++及内核技术
...店，打烊后在灯下一起数钱。”
很简单的道理，在你上大学时，往往会觉得一个月花两三千就能过上很滋润的生活了；等到工作后，月薪几万也能让你的小日子惬意起来；而跨入中年之际，你会开始追求名车豪宅等等。于是你...
Omit rows containing specific column of NA
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Try this:
cc=is.na(DF$y)
m=which(cc==c("TRUE"))
DF=DF[-m,]
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Using reflect, how do you set the value of a struct field?
...ch I would love to see a simple example somewhere!
– cc young
Jun 19 '11 at 10:57
2
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App Inventor 2 AI伴侣有电脑版的吗? - App Inventor 2 中文网 - 清泛网 - 专注C/C++及内核技术
...速度快，模拟的场景也较AIStarter模拟器多一些。
3、对于学生教学场景，功能测试要求不高、或不想受游戏App干扰、或商业模拟器安装不了，推荐使用AI2Starter模拟器。
Q & A
Q：AI2Starter模拟器可以调整分辨率吗？
A：可以，通过...
App Inventor 2 连接方式：AI伴侣、模拟器、USB · App Inventor 2 中文网
...速度快，模拟的场景也较AIStarter模拟器多一些。
3、对于学生教学场景，功能测试要求不高、或不想受游戏App干扰、或商业模拟器安装不了，推荐使用AI2Starter模拟器。
Q & A
Q：AI2Starter模拟器可以调整分辨率吗？
A：可以，通过...
Web colors in an Android color xml resource file
...r>
<color name="Bisque">#FFE4C4</color>
<color name="Moccasin">#FFE4B5</color>
<color name="NavajoWhite">#FFDEAD</color>
<color name="PeachPuff">#FFDAB9</color>
<color name="Gold">#FFD700</color>
<color name="Pink">#FFC0CB<...
致PHP路上的“年轻人” - PHP - 清泛IT社区，为创新赋能！
...补充一点，一定要多看书。刚工作的前两三年，还带着些学生气息，能沉得下心，社会中的打扰也少，此时很适合通过书籍、文档来补充自己。而工作四五年后，就会发现，陆续的开始运用之前看到的点，开始需要翻之前看过的...