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How can I convert immutable.Map to mutable.Map in Scala?
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128
The cleanest way would be to use the mutable.Map varargs factory. Unlike the ++ approach, this...
What does the git index contain EXACTLY?
...he contents of the index:
$ git ls-files --stage
100644 63c918c667fa005ff12ad89437f2fdc80926e21c 0 .gitignore
100644 5529b198e8d14decbe4ad99db3f7fb632de0439d 0 .mailmap
The Racy git problem gives some more details on that structure:
The index is one of the most important data structures in gi...
Size-limited queue that holds last N elements in Java
...eue;
Queue<Integer> fifo = new CircularFifoQueue<Integer>(2);
fifo.add(1);
fifo.add(2);
fifo.add(3);
System.out.println(fifo);
// Observe the result:
// [2, 3]
If you are using an older version of the Apache commons collections (3.x), you can use the Circ...
How can I convert string to datetime with format specification in JavaScript?
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edited May 28 at 11:08
Samuel Liew♦
64.4k4040 gold badges132132 silver badges216216 bronze badges
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Zoom in on a point (using scale and translate)
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John Weisz
20.9k88 gold badges6767 silver badges109109 bronze badges
answered May 23 '15 at 9:12
TatarizeTatariz...
Rails ActiveRecord date between
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edited Mar 16 '17 at 18:26
thutt
58333 silver badges1515 bronze badges
answered Oct 18 '12 at 2:10
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Check if a value exists in pandas dataframe index
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258
This should do the trick
'g' in df.index
...
Convert python datetime to epoch with strftime
...s since epoch you could do it explicitly:
>>> (datetime.datetime(2012,04,01,0,0) - datetime.datetime(1970,1,1)).total_seconds()
1333238400.0
In Python 3.3+ you can use timestamp() instead:
>>> datetime.datetime(2012,4,1,0,0).timestamp()
1333234800.0
Why you should not use d...
ImageUtil 扩展：图像工具扩展，提供图像处理和变换功能 · App Inventor 2 中文网
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How to loop through all but the last item of a list?
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324
for x in y[:-1]
If y is a generator, then the above will not work.
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