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How to implement a rule engine?
...yParse(r.Operator, out tBinary)) {
var right = Expression.Constant(Convert.ChangeType(r.TargetValue, tProp));
// use a binary operation, e.g. 'Equal' -> 'u.Age == 21'
return Expression.MakeBinary(tBinary, left, right);
} else {
var method = tProp.GetMethod(r.Op...
Prepend a level to a pandas MultiIndex
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I think this is a more general solution:
# Convert index to dataframe
old_idx = df.index.to_frame()
# Insert new level at specified location
old_idx.insert(0, 'new_level_name', new_level_values)
# Convert back to MultiIndex
df.index = pandas.MultiIndex.from_frame(ol...
Is calculating an MD5 hash less CPU intensive than SHA family functions?
...eb2e605c6c02d29a88563 linux-master.tar
real 0m1.685s
user 0m1.528s
sys 0m0.156s
$ time md5sum linux-master.tar
d476375abacda064ae437a683c537ec4 linux-master.tar
real 0m2.942s
user 0m2.806s
sys 0m0.136s
$ time sum linux-master.tar
36928 810240
real 0m2.186s
user 0m1.9...
How to automatically start a service when running a docker container?
...th tail it works. For both cases you need to use switch cap_add(--cap-add SYS_PTRACE for run) with at least SYS_PTRACE
– zhrist
Nov 10 '17 at 19:48
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What is the difference between Numpy's array() and asarray() functions?
...u're sort of just changing your view on this list/array. "array": Actually convert this to a new array.
– denvar
May 4 '16 at 18:41
1
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Pretty printing XML in Python
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Nice! Can collapse this to a one liner: python -c 'import sys;import xml.dom.minidom;s=sys.stdin.read();print xml.dom.minidom.parseString(s).toprettyxml()'
– Anton I. Sipos
Apr 17 '12 at 22:17
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Convert date to datetime in Python
Is there a built-in method for converting a date to a datetime in Python, for example getting the datetime for the midnight of the given date? The opposite conversion is easy: datetime has a .date() method.
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How to Execute a Python File in Notepad ++?
...nager. I'm using N++ 6.9.2
Save a new file as new.py
Type in N++
import sys
print("Hello from Python!")
print("Your Python version is: " + sys.version)
Press Alt+Shift+F5
Simple as that.
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How to swap two variables in JavaScript
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@RobertGrant - The xor operator in JavaScript converts its operands to 32-bit integers (using the ToInt32 internal method—see Section 11.10 of the ECMAScript standard). It does not produce the correct results for non-integer numerical values. It also converts non-numer...
What is the difference between parseInt() and Number()?
How do parseInt() and Number() behave differently when converting strings to numbers?
10 Answers
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