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Understanding dispatch_async
...asks within a given queue will begin executing using "first in, first out" order. This is in comparison to the main queue (from dispatch_get_main_queue()), which is a serial queue (tasks will begin executing and finish executing in the order in which they are received).
So, if you send 1000 dispatc...
gcc warning" 'will be initialized after'
...
Make sure the members appear in the initializer list in the same order as they appear in the class
Class C {
int a;
int b;
C():b(1),a(2){} //warning, should be C():a(2),b(1)
}
or you can turn -Wno-reorder
...
Should sorting logic be placed in the model, the view, or the controller? [closed]
...
Who controls the sort order?
(From Wikipedia)
1) Natural order within the data itself:
The order is part of the Model, so it should go there. A raw pull of "all data" would return the data in the sorted order, and there is no interface to cho...
Why does the order of the loops affect performance when iterating over a 2D array?
... x[1][0] etc...
Meaning that you're hitting them all in order. Now look at the 1st version. You're doing:
x[0][0]
x[1][0]
x[2][0]
x[0][1]
...
Linq to Sql: Multiple left outer joins
...be cleaner (you dont need all the into statements):
var query =
from order in dc.Orders
from vendor
in dc.Vendors
.Where(v => v.Id == order.VendorId)
.DefaultIfEmpty()
from status
in dc.Status
.Where(s => s.Id == order.StatusId)
.DefaultI...
Why does this Java program terminate despite that apparently it shouldn't (and didn't)?
...ur object is not safely published those 4 write operations can be freely reordered by the compiler / JVM.
So from the perspective of the reading thread, it is a legal execution to read x with its new value but y with its default value of 0 for example. By the time you reach the println statement (w...
jQuery UI Sortable, then write order into a database
I want to use the jQuery UI sortable function to allow users to set an order and then on change, write it to the database and update it. Can someone write an example on how this would be done?
...
How do I return rows with a specific value first?
..., Oracle, DB2, and many other database systems, this is what you can use:
ORDER BY CASE WHEN city = 'New York' THEN 1 ELSE 2 END, city
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For-each over an array in JavaScript
...k (not used above). The callback is called for each entry in the array, in order, skipping non-existent entries in sparse arrays. Although I only used one argument above, the callback is called with three: The value of each entry, the index of that entry, and a reference to the array you're iteratin...
How can I combine multiple rows into a comma-delimited list in Oracle? [duplicate]
..._name , ','), 2) csv
FROM (SELECT country_name , ROW_NUMBER () OVER (ORDER BY country_name ) rn,
COUNT (*) OVER () cnt
FROM countries)
WHERE rn = cnt
START WITH rn = 1
CONNECT BY rn = PRIOR rn + 1;
CSV ...