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Why isn't Python very good for functional programming? [closed]
I have always thought that functional programming can be done in Python. Thus, I was surprised that Python didn't get much of a mention in this question, and when it was mentioned, it normally wasn't very positive. However, not many reasons were given for this (lack of pattern matching and algebra...
Fastest way to replace NAs in a large data.table
...atrix as big as the whole of dt1, a few times. The other 2 methods work on one column at a time (although I only briefly looked at NAToUnknown).
EDIT (more elegant solution as requested by Ramnath in comments) :
f_dowle2 = function(DT) {
for (i in names(DT))
DT[is.na(get(i)), (i):=0]
}
syst...
How to organize a node app that uses sequelize?
...for info)
It's old and limited in many ways!
First, as @jinglesthula mentioned in comments (and I experienced it too) - there are problems with requiring those files. It's because require doesn't work the same way as readdirSync!
Second - you are very limited in relations - the code doesn't provid...
Flex-box: Align last row to grid
...
One technique would be inserting a number of extra elements (as many as the max number of elements you ever expect to have in a row) that are given zero height. Space is still divided, but superfluous rows collapse to nothing...
Using npm behind corporate proxy .pac
...ain. It turned out that in the "proxy" setting of the .npmrc file (as mentioned below by @Ovidiu Buligan) it contained the %5C for the backslash, but the "https-proxy" just contained the "\". Changing this to also by %5C fixed the problem. I presume this could also be updated by running npm config s...
Using property() on classmethods
...rty):
def __get__(self, cls, owner):
return self.fget.__get__(None, owner)()
class foo(object):
_var=5
def getvar(cls):
return cls._var
getvar=classmethod(getvar)
def setvar(cls,value):
cls._var=value
setvar=classmethod(setvar)
var=ClassProperty(g...
How do I test a private function or a class that has private methods, fields or inner classes?
... to test a private method is via another public method. If this cannot be done, then one of the following conditions is true:
The private method is dead code
There is a design smell near the class that you are testing
The method that you are trying to test should not be private
...
How can I pass a list as a command-line argument with argparse?
...e. Ever.
Let's take a look in more detail at some of the different ways one might try to do this, and the end result.
import argparse
parser = argparse.ArgumentParser()
# By default it will fail with multiple arguments.
parser.add_argument('--default')
# Telling the type to be a list will als...
How to detect Safari, Chrome, IE, Firefox and Opera browser?
...object is defined (but chrome.webstore isn't). Since Opera tries hard to clone Chrome, I use user agent sniffing for this purpose.
Update 2: !!window.opr && opr.addons can be used to detect Opera 20+ (evergreen).
Blink: CSS.supports() was introduced in Blink once Google switched on Chrome 28...
Android DialogFragment vs Dialog
...ntrol of the
dialog (deciding when to show, hide, dismiss it) should be done
through the API here, not with direct calls on the dialog.
Other notes
Fragments are a natural evolution in the Android framework due to the diversity of devices with different screen sizes.
DialogFragments and Frag...