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Update multiple rows in same query using PostgreSQL
...rays :
drop table if exists results_dummy;
create table results_dummy (id int, status text, created_at timestamp default now(), updated_at timestamp default now());
-- populate table with dummy rows
insert into results_dummy
(id, status)
select unnest(array[1,2,3,4,5]::int[]) as id, unnest(array['a...
Google Maps API - Get Coordinates of address
I would like to convert addresses into long/lat.
4 Answers
4
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Android Fatal signal 11 (SIGSEGV) at 0x636f7d89 (code=1). How can it be tracked down?
...getting this error by saving an object to the shared preferences as a gson converted string. The gson String was no good, so retrieving and deserializing the object was not actually working correctly. This meant any subsequent accesses to the object resulted in this error. Scary :)
...
Subqueries vs joins
...mple of how subqueries are evaluated in MySQL 6.0.
The new optimizer will convert this kind of subqueries into joins.
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Meaning of @classmethod and @staticmethod for beginner? [duplicate]
...d
def from_string(cls, date_as_string):
day, month, year = map(int, date_as_string.split('-'))
date1 = cls(day, month, year)
return date1
@staticmethod
def is_date_valid(date_as_string):
day, month, year = map(int, date_as_string.split('-'))
retur...
Change Screen Orientation programmatically using a Button
...indowManager) getSystemService(WINDOW_SERVICE)).getDefaultDisplay();
final int orientation = display.getOrientation();
// OR: orientation = getRequestedOrientation(); // inside an Activity
// set the screen orientation on button click
Button btn = (Button) findViewById(R.id.yourbutton);
btn.setOn...
Naming convention - underscore in C++ and C# variables
...avoid starting a symbol with an underscore in case you accidentally wander into one of the above limitations.
You can see it for yourself why such use of underscores can be disastrous when developing a software:
Try compiling a simple helloWorld.cpp program like this:
g++ -E helloWorld.cpp
You ...
Why does Math.Round(2.5) return 2 instead of 3?
...round to even" (banker's rounding):
Return ValueType: System.DoubleThe integer nearest a. If the
fractional component of a is halfway
between two integers, one of which is
even and the other odd, then the even
number is returned. Note that this
method returns a Double instead of an
i...
Redis strings vs Redis hashes to represent JSON: efficiency?
...ey break out hash-max-ziplist-value or hash-max-ziplist-entries Redis will convert it to practically usual key/value pairs under a hood. ( see hash-max-ziplist-value, hash-max-ziplist-entries ) And breaking under a hood from a hash options IS REALLY BAD, because each usual key/value pair inside Redi...
Difference between == and === in JavaScript [duplicate]
...are strict comparison operators:
JavaScript has both strict and
type-converting equality comparison.
For strict equality the objects being
compared must have the same type and:
Two strings are strictly equal when they have the same sequence of
characters, same length, and same
...