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__proto__ VS. prototype in JavaScript
...x = x;
this.y = y;
}
var myPoint = new Point();
// the following are all true
myPoint.__proto__ == Point.prototype
myPoint.__proto__.__proto__ == Object.prototype
myPoint instanceof Point;
myPoint instanceof Object;
Here Point is a constructor function, it builds an object (data structure) p...
Ruby Array find_first object?
...I also often find annoying that ruby documentation doesn't list methods of all inherited or included classes and modules.
– Mladen Jablanović
Mar 4 '10 at 17:33
4
...
Generating a list of which files changed between hg versions
... consider using the "x::y" (DAG - Directed Acyclic Graph) range.
Given parallel changesets,
1--2---4
\---3
hg status --rev 1:4 would return (1,2,3,4),
i.e. anything between and including the endpoints, according to the local, numerical rev. This might (and most probably will) return different...
How to specify function types for void (not Void) methods in Java8?
...g (void). And this is what you want.
For instance, if I wanted to display all element in a list I could simply create a consumer for that with a lambda expression:
List<String> allJedi = asList("Luke","Obiwan","Quigon");
allJedi.forEach( jedi -> System.out.println(jedi) );
You can see a...
Go naming conventions for const
...your const element exposed to other packages. If you use UpperCamelCase or ALL_CAPS you'll be exporting it outside of your package. For this reason, I stick to lowerCamelCase for private const variables, and I recall reading this recommendation from someone relatively close to the Go project (or per...
How can I find which tables reference a given table in Oracle SQL Developer?
...y PLSQL Developer:
select table_name, constraint_name, status, owner
from all_constraints
where r_owner = :r_owner
and constraint_type = 'R'
and r_constraint_name in
(
select constraint_name from all_constraints
where constraint_type in ('P', 'U')
and table_name = :r_table_name
and own...
What is a “Bitmap heap scan” in a query plan?
... stay in memory, but you get the point).
A bitmap index scan will sequentially open a short-list of disk pages, and grab every applicable row in each one (hence the so-called recheck cond you see in query plans).
Note, as an aside, how clustering/row order affects the associated costs with either ...
Is there any way to kill a Thread?
...
It is generally a bad pattern to kill a thread abruptly, in Python and in any language. Think of the following cases:
the thread is holding a critical resource that must be closed properly
the thread has created several other threads ...
Looping over a list in Python
I have a list with sublists in it. I want to print all the sublists with length equal to 3.
4 Answers
...
How to “re-run with -deprecation for details” in sbt?
...
> compile
> exit
Due to in ThisBuild, set applies the settings to all sub-projects, as well.
Command Line
You could also run the above as a single command on command line.
sbt '; set scalacOptions in ThisBuild ++= Seq("-unchecked", "-deprecation") ; compile'
The trick is to use ; (sem...