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PostgreSQL LIKE query performance variations
...out creating an index on the lowercase value of the field. That way I can convert the query text to lowercase on the backend before querying.
– Jason
Oct 14 '09 at 15:03
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How to measure elapsed time in Python?
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Is there a nice way of converting resulting execturion time in seconds to something like HH:MM::SS?
– Danijel
Feb 4 '16 at 10:05
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Checking to see if one array's elements are in another array in PHP
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You can use array_intersect().
$result = !empty(array_intersect($people, $criminals));
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Removing an activity from the history stack
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Yes, have a look at Intent.FLAG_ACTIVITY_NO_HISTORY.
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Inner join vs Where
...same execution plan, look at these two tables:
CREATE TABLE table1 (
id INT,
name VARCHAR(20)
);
CREATE TABLE table2 (
id INT,
name VARCHAR(20)
);
The execution plan for the query using the inner join:
-- with inner join
EXPLAIN PLAN FOR
SELECT * FROM table1 t1
INNER JOIN table2 t2 ON ...
how to create a Java Date object of midnight today and midnight tomorrow?
... If you did something like System.out.print(date), the system converted the date instance into the system time zone (CDT). 7pm in CDT is midnight in GMT. If you need a midnight in a selected time zone, you have to add this time zone's offset, taking DST into account.
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Use of var keyword in C#
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But the point is that in general it doesn't matter. Provided cust.Orders is something you can enumerate (eg foreach over) then it doesn't matter what type it is. The extra code just gets in the way of reading the intent.
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Is it possible to change the textcolor on an Android SearchView?
...hange the entered text. You can also use
<item name="android:textColorHint">@android:color/white</item>
to change the hint text for the SearchView. (Note that you can replace the @android:color/white with whatever appropriate value you're hoping to use)
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Generate random number between two numbers in JavaScript
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a | 0 is also the fastest and most optimized way to convert a string to an integer. It only works with strings containing integers ("444" and "-444"), i.e. no floats/fractions. It yields a 0 for everything that fails. It is one of the main optimizations behind asm.js.
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What is data oriented design?
...ted Approach
In OOP you would describe balls like this:
class Ball {
Point position;
Color color;
double radius;
void draw();
};
And then you would create a collection of balls like this:
vector<Ball> balls;
Data Oriented Approach
In Data Oriented Design, however, you are mo...