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Number of occurrences of a character in a string [duplicate]
...:
int count = test.Split('&').Length - 1;
Or with LINQ:
test.Count(m>x m> => m>x m> == '&');
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“m>x m> not in y” or “not m>x m> in y”
...tor, which could be applied to a in b just as easily as any other boolean em>x m>pression, whereas not in was a separate operator for convenience and clarity.
The disassembly above was revealing! It seems that while not obviously is a logical negation operator, the form not a in b is special cased so th...
What is “entropy and information gain”?
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I assume entropy was mentioned in the contem>x m>t of building decision trees.
To illustrate, imagine the task of learning to classify first-names into male/female groups. That is given a list of names each labeled with either m or f, we want to learn a model that fits th...
I want to get the type of a variable at runtime
...ble" is always present, and can be passed around as a type parameter. For em>x m>ample:
val m>x m> = 5
def f[T](v: T) = v
f(m>x m>) // T is Int, the type of m>x m>
But depending on what you want to do, that won't help you. For instance, may want not to know what is the type of the variable, but to know if the type o...
Define all functions in one .R file, call them from another .R file. How, if possible?
How do I call functions defined in abc.R file in another file, say m>x m>yz.R?
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Sort rows in data.table in decreasing order on string key `order(-m>x m>,v)` gives error on data.table 1.
...d the following answer is no longer necessary.
You can use DT[order(-rank(m>x m>), y)].
m>x m> y v
1: c 1 7
2: c 3 8
3: c 6 9
4: b 1 1
5: b 3 2
6: b 6 3
7: a 1 4
8: a 3 5
9: a 6 6
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Sort a list of tuples by 2nd item (integer value) [duplicate]
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sorted([('abc', 121),('abc', 231),('abc', 148), ('abc',221)], key=lambda m>x m>: m>x m>[1])
key should be a function that identifies how to retrieve the comparable element from your data structure. In your case, it is the second element of the tuple, so we access [1].
For optimization, see jamylak's res...
How to get a vertical geom_vline to an m>x m>-am>x m>is of class date?
Even though I found Hadley's post in the google group on POSIm>X m>ct and geom_vline , I could not get it done. I have a time series from and would like to draw a vertical line for years 1998, 2005 and 2010 for em>x m>ample. I tried with ggplot and qplot syntam>x m>, but still I either see no vertical line ...
Visualizing branch topology in Git
...aphy, something like these ASCII maps that seem to be used everywhere for em>x m>plaining branches?
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Python中的m>X m>[:,0]和m>X m>[:,1] - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
Python中的m>X m>[:,0]和m>X m>[:,1]m>X m>[:,0]是numpy中数组的一种写法，表示对一个二维数组，取该二维数组第一维中的所有数据，第二维中取第0个数据，直观来说，m>X m>[:,0]就是取所有 m>X m>[:,0]是numpy中数组的一种写法，表示对一个二维数组，取该二维...