This example finds a point on a bezier or cubic curve at position where position is he unit distance on the curve 0 <= position <= 1. The position is clamped to the range thus if values < 0 or > 1 are passed they will be set 0,1 respectively.
Pass the function 6 coordinates for quadrati...
Unlike most other JavaScript objects, symbols are not automatically converted into a string when performing concatenation.
let apple = Symbol('Apple') + ''; // throws TypeError!
Instead, they have to be explicitly converted into a string when necessary, (for example, to get a textual description...
When static_cast is used to convert T D::* to T B::*, the member pointed to must belong to a class that is a base class or derived class of B. Otherwise the behavior is undefined. See Derived to base conversion for pointers to members
The following uses of pointer arithmetic cause undefined behavior:
Addition or subtraction of an integer, if the result does not belong to the same array object as the pointer operand. (Here, the element one past the end is considered to still belong to the array.)
int a[10];
int* p1 = &a...
// 3. Covariant smart pointer result (automated cleanup).
#include <memory>
using std::unique_ptr;
template< class Type >
auto up( Type* p ) { return unique_ptr<Type>( p ); }
class Top
{
private:
virtual Top* virtual_clone() const = 0;
public:
unique_ptr&l...
When using a WebView to display your own custom webpage and this webpage contains Javascript, it might be necessary to establish a two-way communication between the Java program and the Javascript in the web page.
This example shows how to setup such a communication.
The webpage shall display an i...
If two pointers are compared using <, >, <=, or >=, the result is unspecified in the following cases:
The pointers point into different arrays. (A non-array object is considered an array of size 1.)
int x;
int y;
const bool b1 = &x < &y; // unspecified
int ...
You can also make code run synchronously with the main thread using runTask. This is useful when you want to call Bukkit API methods after running code asynchronously from the main thread.
Code called inside of this Runnable will be executed on the main thread, making it safe to call Bukkit API met...
Interprocess communication allows programmers to communicate between different processes. For example let us consider we need to write an PHP application that can run bash commands and print the output. We will be using proc_open , which will execute the command and return a resource that we can com...
CROSS APPLY enables you to "join" rows from a table with dynamically generated rows returned by some table-value function.
Imagine that you have a Company table with a column that contains an array of products (ProductList column), and a function that parse these values and returns a set ...
CROSS APPLY enables you to "join" rows from a table with collection of JSON objects stored in a column.
Imagine that you have a Company table with a column that contains an array of products (ProductList column) formatted as JSON array. OPENJSON table value function can parse these values...
var='line 1
line 2
line3'
readarray -t arr <<< "$var"
or with a loop:
arr=()
while IFS= read -r line; do
arr+=("$line")
done <<< "$var"
Let's assume that the field separator is :
arr=()
while IFS= read -d : -r field || [ -n "$field" ]; do
arr+=("$field")
done <file
Let's assume that the field separator is :
var='1:2:3:4:
newline'
arr=()
while IFS= read -d : -r field || [ -n "$field" ]; do
arr+=("$field")
done <<< "$var"
echo "${arr[4]}"
Output:
newline
You can have functions in the PS1 variable, just make sure to single quote it or use escape for special chars:
gitPS1(){
gitps1=$(git branch 2>/dev/null | grep '*')
gitps1="${gitps1:+ (${gitps1/#\* /})}"
echo "$gitps1"
}
PS1='\u@\h:\w$(gitPS1)$ '
It will...
timeNow(){
echo "$(date +%r)"
}
PS1='[$(timeNow)] \u@\h:\w$ '
It will give you a prompt like this:
[05:34:37 PM] user@Host:/path$
Notes:
Make the changes in ~/.bashrc or /etc/bashrc or ~/.bash_profile or ~./profile file (depending on the OS) and save it.
Run source ~/.ba...
Internal Table Declaration Based on Local Type Definition
" Declaration of type
TYPES: BEGIN OF ty_flightb,
id TYPE fl_id,
dat TYPE fl_date,
seatno TYPE fl_seatno,
firstname TYPE fl_fname,
lastname TYPE fl_lname,
fl...
