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How to enumerate a range of numbers starting at 1
...parameter so instead you could create two range objects and zip them:
r = xrange(2000, 2005)
r2 = xrange(1, len(r) + 1)
h = zip(r2, r)
print h
Result:
[(1, 2000), (2, 2001), (3, 2002), (4, 2003), (5, 2004)]
If you want to create a generator instead of a list then you can use izip instead.
...
Understanding generators in Python
...
Note: this post assumes Python 3.x syntax.†
A generator is simply a function which returns an object on which you can call next, such that for every call it returns some value, until it raises a StopIteration exception, signaling that all values have been...
Assigning code to a variable
... to an Action like this:
var ButtonClicked = new Action(() => MessageBox.Show("hi"));
Then call it:
ButtonClicked();
For completeness (in regards to the various comments)...
As Erik stated, you could execute multiple lines of code:
var ButtonClicked = new Action(() =>
{
MessageBox....
Checking if a string can be converted to float in Python
...
I would just use..
try:
float(element)
except ValueError:
print "Not a float"
..it's simple, and it works
Another option would be a regular expression:
import re
if re.match(r'^-?\d+(?:\.\d+)?$', element) is None:
print "Not float"
...
How to insert an item into an array at a specific index (JavaScript)?
...ou want is the splice function on the native array object.
arr.splice(index, 0, item); will insert item into arr at the specified index (deleting 0 items first, that is, it's just an insert).
In this example we will create an array and add an element to it into index 2:
var arr = [];
arr[0] ...
Zip lists in Python
..., 19, 19)]
To find out how many elements each tuple contains, you could examine the length of the first element:
In [3]: result = zip(a, b, c)
In [4]: len(result[0])
Out[4]: 3
Of course, this won't work if the lists were empty to start with.
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LINQ: Not Any vs All Don't
...) confusing* when there's an alternative test of equal verbosity and complexity that would return true for the condition we want to act upon. Yet really, I personally find nothing to favour one over the other of the two alternatives you give, and would perhaps lean very slightly toward the former if...
Python 3.x rounding behavior
...liar with this module. Any idea how I would get the behavior of Python v 2.x? The examples you show don't seem to do that. Just curious if that would be possible.
– Levon
May 31 '12 at 2:05
...
boost Composite keys - C/C++ - 清泛网 - 专注C/C++及内核技术
...o or more fields of a given table The analogous concept in Boost MultiIndex is Composite keys
In relational databases, composite keys depend on two or more fields of a given table. The analogous concept in Boost.MultiIndex is modeled by means of composite_key, as shown in the example:
stru...
Copying PostgreSQL database to another server
...
I would expect that you should be able to copy a remote database with name x to a local database with name y, but @Ferran's solution does not work for this... It looks to me like porneL's solution just leaves the bzip2 files on the s...