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Creating a singleton in Python
...ample implementation:
class Singleton(type):
_instances = {}
def __call__(cls, *args, **kwargs):
if cls not in cls._instances:
cls._instances[cls] = super(Singleton, cls).__call__(*args, **kwargs)
return cls._instances[cls]
class Logger(object):
__met...
Can dplyr package be used for conditional mutating?
... edited Feb 12 at 13:34
alan ocallaghan
2,36899 silver badges2626 bronze badges
answered Oct 8 '16 at 18:22
...
Converting list to *args when calling function [duplicate]
...can use the * operator before an iterable to expand it within the function call. For example:
timeseries_list = [timeseries1 timeseries2 ...]
r = scikits.timeseries.lib.reportlib.Report(*timeseries_list)
(notice the * before timeseries_list)
From the python documentation:
If the syntax *expr...
How do I delay a function call for 5 seconds? [duplicate]
I want widget.Rotator.rotate() to be delayed 5 seconds between calls... how do I do this in jQuery... it seems like jQuery's delay() wouldn't work for this...
...
Calling a method every x minutes
I want to call some method on every 5 minutes. How can I do this?
7 Answers
7
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Call apply-like function on each row of dataframe with multiple arguments from each row
...dataframe with multiple columns. For each row in the dataframe, I want to call a function on the row, and the input of the function is using multiple columns from that row. For example, let's say I have this data and this testFunc which accepts two args:
...
How to “properly” create a custom object in JavaScript?
...pe at '+this.x+', '+this.y;
};
Now to subclass it, in as much as you can call what JavaScript does subclassing. We do that by completely replacing that weird magic prototype property:
function Circle(x, y, r) {
Shape.call(this, x, y); // invoke the base class's constructor function to take co...
How do I implement a callback in PHP?
How are callbacks written in PHP?
9 Answers
9
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Quick way to list all files in Amazon S3 bucket?
... If you get: boto.exception.S3ResponseError: S3ResponseError: 403 Forbidden Make sure the user policy for the Access/Secret key has access to the S3.
– topherjaynes
May 27 '14 at 23:44
...
Git pull after forced update
I just squashed some commits with git rebase and did a git push --force (which is evil, I know).
3 Answers
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