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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...
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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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...
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...
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<...
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...
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...