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What is the Scala identifier “implicitly”?
...ow it is used in SeqLike#sorted. Implicit Parameters are also used to pass Array manifests, and CanBuildFrom instances.
Scala 2.8 allows a shorthand syntax for implicit parameters, called Context Bounds. Briefly, a method with a type parameter A that requires an implicit parameter of type M[A]:
de...
What is the C runtime library?
...at runtime are implemented in the runtime library, e.g. some logic errors, array bounds checking, dynamic type checking, exception handling and possibly debugging functionality. For this reason, some programming bugs are not discovered until the program is tested in a "live" environment with real da...
Understanding Canvas and Surface concepts
...A Bitmap is simply a wrapper for a collection of pixels. Think of it as an array of pixels with some other convenient functions.
The Canvas is simply the class that contains all the drawing methods. It is similar to the Graphics class in AWT/Swing if you are familiar with that. All the logic on how...
Facebook Graph API v2.0+ - /me/friends returns empty, or only friends who also use my application
...acebookFriendsTask.class.getSimpleName();
GraphObject graphObject;
ArrayList<FacebookFriend> myList = new ArrayList<FacebookFriend>();
@Override
protected Boolean doInBackground(FacebookFriend.Type... pickType) {
//
// Determine Type
//
St...
Why are preprocessor macros evil and what are the alternatives?
...rk in a regular expression in C (you could make something that averages an array of any type of number, which C can't do - but C++ has templates for that). Whilst C++11 adds a few more things that "you don't need macros for this", it's mostly already solved in earlier C/C++.
– ...
Simulating tremor (from e.g. Parkinson's Disease) with the mouse on a webpage?
...ent cursor location: http://jsfiddle.net/benmosher/0x4mc64v/4/
(The normal array is the result of calling rnorm(100) in my R console. Simplest way I could think of in JS to sample a normally-distributed random integer.)
shar...
JPA: How to have one-to-many relation of the same Entity type
....setParent(parent);
daughter.setParent(parent);
parent.setChildren(Arrays.asList(son, daughter));
em.persist(parent);
em.persist(son);
em.persist(daughter);
em.getTransaction().commit();
}
In this case, all three entity instances must be persisted before transaction commi...
Is Java Regex Thread Safe?
...hows a bunch of member variables including the text that is being matched, arrays for groups, a few indexes for maintain location and a few booleans for other state. This all points to a stateful Matcher that would not behave well if accessed by multiple Threads. So does the JavaDoc:
Instance...
Perform debounce in React.js
...at only changes if one of the dependencies has changed.
Passing an empty array as a dependency makes sure the callback is called only once. Here's a simple implementation :
import React, { useCallback } from "react";
import { debounce } from "lodash";
const handler = useCallback(debounce(someFu...
What are the rules about using an underscore in a C++ identifier?
...cs followed by a lowercase letter are reserved
for additional string and array functions.
Names beginning with PRI or SCN followed by any lowercase letter or X are reserved
for additional format specifier macros
Names that end with _t are reserved
for additional type names.
While using th...