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Best practices for SQL varchar column length [closed]
...), it does not make any difference whether you declare a column as VARCHAR(100) or VARCHAR(500).
You should see the max length provided for a VARCHAR column as a kind of constraint (or business rule) rather than a technical/physical thing.
For PostgreSQL the best setup is to use text without a le...
How does Access-Control-Allow-Origin header work?
...
Question is a bit too old to answer, but I am posting this for any future reference to this question.
According to this Mozilla Developer Network article,
A resource makes a cross-origin HTTP request when it requests a resource from a...
JavaScript hashmap equivalent
...sometimes called associative array or dictionary) which allows to access arbitrary values by arbitrary keys. JavaScript's fundamental data structure is the object, a special type of map which only accepts strings as keys and has special semantics like prototypical inheritance, getters and setters an...
Significance of a .inl file in C++
...definition
inl for header implementation
Which breaks down into the following example:
// A.hpp
struct B ;
struct A
{
void doSomethingElse() ;
void doSomething(B & b) ;
} ;
And:
// A.inl
#include <A.hpp>
#include <B.hpp>
inline void A::doSomethingElse()
{
// Etc.
...
List of all index & index columns in SQL Server DB
...- Au Revoir
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answered Apr 27 '12 at 5:55
DragonDragon
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How do I verify/check/test/validate my SSH passphrase?
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answered Dec 10 '10 at 17:20
Ignacio Vazquez-AbramsIgnacio Vazquez-Abrams
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...
Difference between getDefaultSharedPreferences and getSharedPreferences
...
I know this post is a bit old, but since 24.0.1 of the v7 support library you can retrieve the default preferences by context anywhere using
// context might be an application context, activity, ..
// so if you want to get your apps defaults, pas...
How would you count occurrences of a string (actually a char) within a string?
...rovement by switching to a for instead of a foreach, but only a tiny, tiny bit.
– Mark
Feb 12 '09 at 18:13
17
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How to create an empty file at the command line in Windows?
...ck Cuff's answer and does also produce a 0-byte-length file) is that this "bit of redirection" (the <nul... trick) can be used to echo lines without any CR:
<nul (set/p z=hello) >out.txt
<nul (set/p z= world!) >>out.txt
dir out.txt
The dir command should indicate the file siz...
Django Setup Default Logging
...n! While using '' instead of 'root' is somewhat logical, I still find it a bit inconsistent of them to move root entry into the dict's root in the process of otherwise smooth transition from 2.6 fileConfig logic to 2.7 dictConfig one.
– Antony Hatchkins
Sep 18 ...