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Move assignment operator and `if (this != &rhs)`
...ptimal solution.
The use of Copy and Swap is for dumb_array is a classic example of putting the most expensive operation with the fullest features at the bottom layer. It is perfect for clients who want the fullest feature and are willing to pay the performance penalty. They get exactly what they...
HTML 5 Favicon - Support?
...there are several things to consider.
The first (of course) is Internet Explorer. IE does not support PNG favicons until version 11. So our first line is a conditional comment for favicons in IE 9 and below:
<!--[if IE]><link rel="shortcut icon" href="path/to/favicon.ico"><![endif...
Paste multiple columns together
... to paste together
cols <- c( 'b' , 'c' , 'd' )
# create a new column `x` with the three columns collapsed together
data$x <- apply( data[ , cols ] , 1 , paste , collapse = "-" )
# remove the unnecessary columns
data <- data[ , !( names( data ) %in% cols ) ]
...
Why doesn't print work in a lambda?
...
A lambda's body has to be a single expression. In Python 2.x, print is a statement. However, in Python 3, print is a function (and a function application is an expression, so it will work in a lambda). You can (and should, for forward compatibility :) use the b...
Tick symbol in HTML/XHTML
...have glyphs for all the code points.
Try the following characters:
☐ (0x2610 in Unicode hexadecimal [HTML decimal: &#9744;]): an empty (unchecked) checkbox
☑ (0x2611 [HTML decimal: &#9745;]): the checked version of the previous checkbox
✓ (0x2713 [HTML decimal: &#10003;])
✔ (0x...
What does do?
...o and now the question really should be should you even consider using the X-UA-Compatible tag on your site? with the changes Microsoft has made to its browsers (more on those below).
Depending upon what Microsoft browsers you support you may not need to continue using the X-UA-Compatible tag. If y...
Python dictionary from an object's fields
...el and your attributes at instance level, so __dict__ should be fine. For example:
>>> class A(object):
... def __init__(self):
... self.b = 1
... self.c = 2
... def do_nothing(self):
... pass
...
>>> a = A()
>>> a.__dict__
{'c': 2, 'b': 1}
A better appr...
Find object by id in an array of JavaScript objects
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Difference between `constexpr` and `const`
What's the difference between constexpr and const ?
9 Answers
9
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How to sort Counter by value? - python
... items for you:
>>> from collections import Counter
>>> x = Counter({'a':5, 'b':3, 'c':7})
>>> x.most_common()
[('c', 7), ('a', 5), ('b', 3)]
It'll do so in the most efficient manner possible; if you ask for a Top N instead of all values, a heapq is used instead of a st...