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How to think in data stores instead of databases?
...e does not have LIKE Keyword) SQL which is GQL.
Data Insert/Update/Delete/Select
This where we all are interested in, as in RDMBS we require one query for Insert, Update, Delete and Select just like RDBMS, Datastore has put, delete, get(dont get too excited) because Datastore put or get in terms of...
What is the difference between `new Object()` and object literal notation?
...umber"
The object created using the above method (new Object(1)) would be converted to object type if a property is added to it.
var obj = new Object(1);
typeof obj // "number"
obj.a = 2;
typeof obj // "object"
If the object is a copy of a child class of object, we could add the property without ...
Difference between Divide and Conquer Algo and Dynamic Programming
...tead of recalculating it.
By the way, dynamic programming doesn't mean to convert a recursive code into an iterative code. You can also save the subresults into a variable if you want a recursive code. In this case the technique is called memoization. For our example it looks like this:
// declare...
What is an SDL renderer?
...re is an efficient, driver-specific representation of pixel data.
You can convert an SDL_Surface* to SDL_Texture using
SDL_Texture* SDL_CreateTextureFromSurface(SDL_Renderer* renderer,
SDL_Surface* surface)
After this, the SDL_Surface should be freed u...
Postgres: “ERROR: cached plan must not change result type”
...ng this error.
My application opened a database connection and prepared a SELECT statement for execution.
Meanwhile, another script was modifying the database table, changing the data type of one of the columns being returned in the above SELECT statement.
I resolved this by restarting the applic...
Fastest method of screen capturing on Windows
...e source and destination device contexts do not match, the BitBlt function converts the source color format to match the destination format.
– user244343
Mar 4 '11 at 2:08
...
Get the closest number out of an array
...
Here's the pseudo-code which should be convertible into any procedural language:
array = [2, 42, 82, 122, 162, 202, 242, 282, 322, 362]
number = 112
print closest (number, array)
def closest (num, arr):
curr = arr[0]
foreach val in arr:
if abs (n...
Is the practice of returning a C++ reference variable evil?
...const&", what actually happens is that the return statement implicitly converts the temp, which is of type T, to type "T const&" as per 6.6.3.2 (a legal conversion but one which does not extend lifetime), and then the calling code initialises the ref of type "T const&" with the function'...
Switch case with fallthrough?
...
You can also convert C to lowercase case "${C,,}" in if the case isn't important
– Sprinterfreak
Mar 22 '14 at 12:02
...
How to implement one-to-one, one-to-many and many-to-many relationships while designing tables?
...ction table
Example queries:
-- Getting all students for a class:
SELECT s.student_id, last_name
FROM student_classes sc
INNER JOIN students s ON s.student_id = sc.student_id
WHERE sc.class_id = X
-- Getting all classes for a student:
SELECT c.class_id, name
FROM s...