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What is the apply function in Scala?
...ling and verbing nouns ( an AddTwo class has an apply that adds two!) examples.
3 Answers
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C＋＋模板的特化 - C/C++ - 清泛网 - 专注C/C++及内核技术
...ue;
}
};
混合型的：
template<typename T1, typename T2>
class X {...};
template<typename T>
class X<vector<T>, int&> {...}; //至于这里怎么都把T2搞没了变成只依赖一个模板参数T了的问题，大家别着急，我来告诉你个本质的东西，把我这么三点...
Reverse Y-Axis in PyPlot
I have a scatter plot graph with a bunch of random x, y coordinates. Currently the Y-Axis starts at 0 and goes up to the max value. I would like the Y-Axis to start at the max value and go up to 0.
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Algorithm to return all combinations of k elements from n
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Is there a typical state machine implementation pattern?
...gram logic, run other state machines, etc
}
}
This can of course be extended to support multiple state machines, etc. Transition actions can be accommodated as well:
typedef void transition_func_t( instance_data_t *data );
void do_initial_to_foo( instance_data_t *data );
void do_foo_to_bar( ...
Remove duplicated rows using dplyr
...ginal answer below:
library(dplyr)
set.seed(123)
df <- data.frame(
x = sample(0:1, 10, replace = T),
y = sample(0:1, 10, replace = T),
z = 1:10
)
One approach would be to group, and then only keep the first row:
df %>% group_by(x, y) %>% filter(row_number(z) == 1)
## Source: lo...
What's the best way to inverse sort in scala?
...ay be done by method sorted with an implicit Ordering, which you may make explicit, and Ordering has a reverse (not the list reverse below)
You can do
list.sorted(theOrdering.reverse)
If the ordering you want to reverse is the implicit ordering, you can get it by implicitly[Ordering[A]] (A the t...
How can I pad an int with leading zeros when using cout
...g namespace std;, but that's bad practice so maybe instead you should prefix the three identifiers in this answer with std::.
– David Grayson
Jul 6 '15 at 17:44
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PHP cURL custom headers
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curl_setopt($ch, CURLOPT_HTTPHEADER, array(
'X-Apple-Tz: 0',
'X-Apple-Store-Front: 143444,12'
));
http://www.php.net/manual/en/function.curl-setopt.php
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im...
Logical operator in a handlebars.js {{#if}} conditional
...Handlebars 1.0.0), and registerBoundHelper can't deal with Handlebars syntax. The workaround is to create a custom view: stackoverflow.com/questions/18005111/…
– Warren Seine
Aug 29 '13 at 14:41
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