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Rails find_or_create_by more than one attribute?
...epak Mahakale
18.4k77 gold badges5454 silver badges7373 bronze badges
answered Jun 15 '10 at 15:31
x1a4x1a4
18.6k44 gold badges373...
what is the difference between 'transform' and 'fit_transform' in sklearn
... already called its .fit method.
In [12]: pc2 = RandomizedPCA(n_components=3)
In [13]: pc2.transform(X) # can't transform because it does not know how to do it.
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AttributeError Traceback (most rece...
extract part of a string using bash/cut/split
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338
To extract joebloggs from this string in bash using parameter expansion without any extra proc...
Convert a character digit to the corresponding integer in C
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153
As per other replies, this is fine:
char c = '5';
int x = c - '0';
Also, for error checking, ...
How is set() implemented?
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– Claudiu Creanga
Sep 21 '16 at 21:13
4
No, average case is O(1) but worst case is O(N) for hash ...
XML Document to String
...the simplest way to get the String representation of a XML Document ( org.w3c.dom.Document )? That is all nodes will be on a single line.
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Undo VS 'Exclude from project'?
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edited Sep 3 '12 at 13:12
Owais Qureshi
3,94255 gold badges3535 silver badges5858 bronze badges
...
Only read selected columns
... header = TRUE)
Year Jan Feb Mar Apr May Jun
1 2009 -41 -27 -25 -31 -31 -39
2 2010 -41 -27 -25 -31 -31 -39
3 2011 -21 -27 -2 -6 -10 -32
Change "integer" to one of the accepted types as detailed in ?read.table depending on the real type of data.
data.txt looks like this:
$ cat data.tx...