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What's the difference between lapply and do.call?
I'm learning R recently and confused by two function: lapply and do.call . It seems that they're just similar to map function in Lisp. But why are there two functions with such a different name? Why doesn't R just use a function called map ?
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How do I parse a URL into hostname and path in javascript?
I would like to take a string
21 Answers
21
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A more useful statusline in vim? [closed]
I’d like to make my statusline in vim more informative and interesting, and for that I need some ideas. How did you customize your statusline?
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How can I quickly sum all numbers in a file?
I have a file which contains several thousand numbers, each on it's own line:
33 Answers
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Create list of single item repeated N times
I want to create a series of lists, all of varying lengths. Each list will contain the same element e , repeated n times (where n = length of the list).
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Showing line numbers in IPython/Jupyter Notebooks
Error reports from most language kernels running in IPython/Jupyter Notebooks indicate the line on which the error occurred; but (at least by default) no line numbers are indicated in Notebooks.
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How do I merge a list of dicts into a single dict?
How can I turn a list of dicts like this
10 Answers
10
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What is the pythonic way to detect the last element in a 'for' loop?
I'd like to know the best way (more compact and "pythonic" way) to do a special treatment for the last element in a for loop. There is a piece of code that should be called only between elements, being suppressed in the last one.
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多媒体组件 · App Inventor 2 中文网
...Selection)
Image1.Picture = ImageTools1.AddTextWatermark(avatar, "fun123.cn", &HFFFFFFFF, 0, "右下")
}
拍照后压缩，再转成 Base64 交给大模型识图（Base64 是图片的文本形式，接口要求「图片放进 JSON」时就用它）：
global photoBase64 = ""
when Camera1.After...
When to use lambda, when to use Proc.new?
In Ruby 1.8, there are subtle differences between proc/lambda on the one hand, and Proc.new on the other.
14 Answers
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