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Efficient paging in SQLite with millions of records
...ays have to use an ORDER BY clause; otherwise, the order is arbitrary.
To do efficient paging, save the first/last displayed values of the ordered field(s), and continue just after them when displaying the next page:
SELECT *
FROM MyTable
WHERE SomeColumn > LastValue
ORDER BY SomeColumn
LIMIT 1...
Is “else if” a single keyword?
...obably not syntactically but instruction-wise.
– Brandon
Jun 23 '14 at 23:02
18
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How can I generate UUID in C#
I am creating an .idl file programmatically. How do I create UUIDs for the interfaces and Methods Programmatically.
5 Answ...
Circle line-segment collision detection algorithm?
... _e - 2( _e*_c ) + _c * _c - r2 = 0
*Where _d is the vector d and * is the dot product.*
And then,
t2( _d * _d ) + 2t( _d * ( _e - _c ) ) + ( _e - _c ) * ( _e - _c ) - r2 = 0
Letting _f = _e - _c
t2( _d * _d ) + 2t( _d * _f ) + _f * _f - r2 = 0
So we get:
t2 * (d DOT d) + 2t*( f DOT d ) + ( f DOT...
using extern template (C++11)
...er.cpp" which explicitly instantiates it. "extern template" is defined to do nothing if it's along with an explicit instantiation. This at least works in gcc 7.2.0 and clang 5.0.0, I haven't used it yet in VS.
– user1902689
Nov 8 '17 at 6:04
...
How can I clear or empty a StringBuilder? [duplicate]
...ut I can't see any method similar to the .NET StringBuilder.Clear in the documentation, just the delete method which seems overly complicated.
...
How to prevent the activity from loading twice on pressing the button
...
ok i guess you are doing some long processing after starting new activity.. That's why the screen turns out black. Now if you want to avoid that black screen, you should show a progress dialog at the start of activity and do the long processing...
Explain Python entry points?
I've read the documentation on egg entry points in Pylons and on the Peak pages, and I still don't really understand. Could someone explain them to me?
...
How would you access Object properties from within an object method? [closed]
...d use it internally as well - using both will lead to maintenance problems down the road (e.g. somebody adds code to a setter that needs to run every time that property is set, and the property is being set internally w/o that setter being called).
...
When is “i += x” different from “i = i + x” in Python?
...= calls the __iadd__ method (if it exists -- falling back on __add__ if it doesn't exist) whereas + calls the __add__ method1 or the __radd__ method in a few cases2.
From an API perspective, __iadd__ is supposed to be used for modifying mutable objects in place (returning the object which was mut...