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How do I typedef a function pointer with the C++11 using syntax?
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It has a similar syntax, except you remove the identifier from the pointer:
using FunctionPtr = void (*)();
Here is an Example
If you want to "take away the uglyness", try what Xeo suggested:
#include <type_traits>
using FunctionPtr = std::add_pointer<void(...
difference between each.with_index and each_with_index in Ruby?
...it simply adds a number to the index. When you check the index after your call, you will find it is unaffected. Good notes as usual, @sawa
– vgoff
Nov 28 '13 at 6:14
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How can I submit a form using JavaScript?
I have a form with id theForm which has the following div with a submit button inside:
10 Answers
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MySQL Delete all rows from table and reset ID to zero
...ete all rows from a table but when I add a new row, I want the primary key ID, which has an auto increment, to start again from 0 respectively from 1.
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How to query as GROUP BY in django?
...ike aggregating lines_count=Count('lines'))).
Over a queryset qs you can call qs.query.group_by = ['field1', 'field2', ...] but it is risky if you don't know what query are you editing and have no guarantee that it will work and not break internals of the QuerySet object. Besides, it is an interna...
CSS Input Type Selectors - Possible to have an “or” or “not” syntax?
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CSS3 has a pseudo-class called :not()
input:not([type='checkbox']) {
visibility: hidden;
}
<p>If <code>:not()</code> is supported, you'll only see the checkbox.</p>
<ul...
Magic number in boost::hash_combine
The boost::hash_combine template function takes a reference to a hash (called seed ) and an object v . According to the docs , it combines seed with the hash of v by
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Global variables in AngularJS
...alue. The problem with it is that the controller that initialises it, gets called again by angular some how and then resets the variable back to its initial value.
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Clear text from textarea with selenium
...that the proper error message appears when text in certain fields are invalid. One check for validity is that a certain textarea element is not empty.
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Difference between filter and filter_by in SQLAlchemy
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Be careful when using .filter. a query like id=12345, query(users).filter(id == id) will not filter on users.id. Instead, it will evaluate id == id as True and return all users. You need to use .filter(users.id == id) (as demoed above). I made this mistake earlier toda...