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Python List vs. Array - when to use?
...ctl or fctnl).
array.array is also a reasonable way to represent a mutable string in Python 2.x (array('B', bytes)). However, Python 2.6+ and 3.x offer a mutable byte string as bytearray.
However, if you want to do math on a homogeneous array of numeric data, then you're much better off using NumPy,...
Colorized Ruby output to the terminal [closed]
...hat works like the gem colorize without needing another dependency.
class String
# colorization
def colorize(color_code)
"\e[#{color_code}m#{self}\e[0m"
end
def red
colorize(31)
end
def green
colorize(32)
end
def yellow
colorize(33)
end
def blue
colorize(...
Parse JSON in C#
...xt, although there are a number of examples out there with simplified JSON strings.
7 Answers
...
Subset of rows containing NA (missing) values in a chosen column of a data frame
...olumn (in the example it would be column Var2) has there an 'NA' character string (I will replace it with your second statement), then I would like to choose the entire row to be part of the new data frame.
– John
Nov 2 '11 at 14:29
...
C++ STL Vectors: Get iterator from index?
... legal to do this folowing, according to me:
int main()
{
void foo(const char *);
sdt::vector<char> vec;
vec.push_back('h');
vec.push_back('e');
vec.push_back('l');
vec.push_back('l');
vec.push_back('o');
vec.push_back('/0');
foo(&vec[0]);
}
Of course, either foo must not copy the ad...
Any gotchas using unicode_literals in Python 2.6?
...
The main source of problems I've had working with unicode strings is when you mix utf-8 encoded strings with unicode ones.
For example, consider the following scripts.
two.py
# encoding: utf-8
name = 'helló wörld from two'
one.py
# encoding: utf-8
from __future__ import unic...
Multiple line code example in Javadoc comment
...sues (in particular with Generics), e.g.:
* <pre>
* {@code
* Set<String> s;
* System.out.println(s);
* }
* </pre>
Will give correct HTML output:
Set<String> s;
System.out.println(s);
While omitting the @code block (or using a <code> tag) will result in HTML like t...
Regular expression to match a line that doesn't contain a word
...ng negative look-arounds:
^((?!hede).)*$
The regex above will match any string, or line without a line break, not containing the (sub)string 'hede'. As mentioned, this is not something regex is "good" at (or should do), but still, it is possible.
And if you need to match line break chars as wel...
Linux: compute a single hash for a given folder & contents?
...son Output as JSON
-d, --delim=: Character or string delimiter/separator for terse output(default ':')
-l, --max-level=N Do not traverse tree beyond N level(s)
--hash Enable hashing(default is MD5).
-c, --checksum=md5 Valid hashing...
ORA-00979 not a group by expression
...ECT cr.review_sk,
cr.cs_sk,
cr.full_name,
tolist(to_char(cf.fact_date, 'mm/dd/yyyy')) "appt",
cs.cs_id,
cr.tracking_number
from review cr, cs, fact cf
where cr.cs_sk = cs.cs_sk
and UPPER(cs.cs_id) like '%' || UPPER(i_cs_id) || '%'
and row_delete_da...