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What are C++ functors and their uses?
...ate objects which "look like" a function:
// this is a functor
struct add_m>x m> {
add_m>x m>(int val) : m>x m>(val) {} // Constructor
int operator()(int y) const { return m>x m> + y; }
private:
int m>x m>;
};
// Now you can use it like this:
add_m>x m> add42(42); // create an instance of the functor class
int i = add4...
Object of custom type as dictionary key
..._(self, other):
# Not strictly necessary, but to avoid having both m>x m>==y and m>x m>!=y
# True at the same time
return not(self == other)
The Python dict documentation defines these requirements on key objects, i.e. they must be hashable.
...
generate days from date range
...bles. The subquery generates dates for the last 10,000 days, and could be em>x m>tended to go as far back or forward as you wish.
select a.Date
from (
select curdate() - INTERVAL (a.a + (10 * b.a) + (100 * c.a) + (1000 * d.a) ) DAY as Date
from (select 0 as a union all select 1 union all select...
How to merge 2 JSON objects from 2 files using jq?
...e * operator. When given two objects, it will merge them recursively. For em>x m>ample,
jq -s '.[0] * .[1]' file1 file2
Important: Note the -s (--slurp) flag, which puts files in the same array.
Would get you:
{
"value1": 200,
"timestamp": 1382461861,
"value": {
"aaa": {
"value1": "v...
What are rvalues, lvalues, m>x m>values, glvalues, and prvalues?
In C++03, an em>x m>pression is either an rvalue or an lvalue .
11 Answers
11
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Fim>x m>ing the order of facets in ggplot
...vels=unique(.)))) %>% # convert to factor
ggplot() +
geom_bar(aes(m>x m> = type, y=amount, fill=type),
position="dodge", stat="identity") +
facet_grid(~ size)
You can apply this solution to arrange the bars within facets, too, though you can only choose a single, preferred order...
Is there a function to make a copy of a PHP array to another?
...confused by intricacies such as ArrayObject, which is an object that acts em>x m>actly like an array. Being an object however, it has reference semantics.
Edit: @AndrewLarsson raises a point in the comments below. PHP has a special feature called "references". They are somewhat similar to pointers in la...
How to find the largest file in a directory and its subdirectories?
We're just starting a UNIm>X m> class and are learning a variety of Bash commands. Our assignment involves performing various commands on a directory that has a number of folders under it as well.
...
How to get a list of all files that changed between two Git commits?
...a list of all changed files in my repository for a report (I started with em>x m>isting source code).
8 Answers
...
Convert character to ASCII code in JavaScript
... unlike String.fromCharCode( asciiNumVal ), stringInstance.charCodeAt( indem>x m> ) is not a static method of class String
– bobobobo
Sep 12 '12 at 19:09
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