Say you want to print variables in a 3 character column.
Note: doubling { and } escapes them.
s = """
pad
{{:3}} :{a:3}:
truncate
{{:.3}} :{e:.3}:
combined
{{:>3.3}} :{a:>3.3}:
{{:3.3}} :{a:3.3}:
{{:3.3}} :{c:3...
We can omit the argument in the call if that argument is an Optional Argument
Every Optional Argument has its own default value
It will take default value if we do not supply the value
A default value of a Optional Argument must be a
Constant expression.
Must be a value type such as enum or s...
While System.Diagnostics.Contracts is included within the .Net Framework. To use Code Contracts you must install the Visual Studio extensions.
Under Extensions and Updates search for Code Contracts then install the Code Contracts Tools
After the tools are installed you must enable Code Contract...
Docker volumes are not automatically removed when a container is stopped. To remove associated volumes when you stop a container:
docker rm -v <container id or name>
If the -v flag is not specified, the volume remains on-disk as a 'dangling volume'. To delete all dangling volumes:
docker ...
Conditional contexts in Lua (if, elseif, while, until) do not require a boolean. Like many languages, any Lua value can appear in a condition. The rules for evaluation are simple:
false and nil count as false.
Everything else counts as true.
if 1 then
print("Numbers work.")
...
K&R
void* is a catch all type for pointers to object types. An example of this in use is with the malloc function, which is declared as
void* malloc(size_t);
The pointer-to-void return type means that it is possible to assign the return value from malloc to a pointer to any other type of ob...
Conditional expressions can be done with ~[ and ~]. The clauses of the expression are separated using ~;.
By default, ~[ takes an integer from the argument list, and picks the corresponding clause. The clauses start at zero.
(format t "~@{~[First clause~;Second clause~;Third clause~;Fourth cl...
Like many Java objects, all String instances are created on the heap, even literals. When the JVM finds a String literal that has no equivalent reference in the heap, the JVM creates a corresponding String instance on the heap and it also stores a reference to the newly created String instance in th...
With Clipping and Masking you can make some specified parts of elements transparent or opaque. Both can be applied to any HTML element.
Clipping
Clips are vector paths. Outside of this path the element will be transparent, inside it's opaque. Therefore you can define a clip-path property on elemen...
A declaration introduces an identifier and describes its type, be it a type, object, or function. A declaration is what the compiler needs to accept references to that identifier. These are declarations:
extern int bar;
extern int g(int, int);
double f(int, double); /* extern can be omitted for f...
The following embeds an untrusted web page with all restrictions enabled
<iframe sandbox src="http://example.com/"></iframe>
To allow the page to run scripts and submit forms, add allow-scripts and allow-forms to the sandbox attribute.
<iframe sandbox="allow-script...
A data race or race condition is a problem that can occur when a multithreaded program is not properly synchronized. If two or more threads access the same memory without synchronization, and at least one of the accesses is a 'write' operation, a data race occurs. This leads to platform dependent, p...
