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Selectors in Objective-C?
...implementation might be different for each.
Example:
(lldb) breakpoint --set selector viewDidLoad
This will set a breakpoint on all viewDidLoad implementations in your app.
So selector is kind of a global identifier for a method.
...
Python: Bind an Unbound Method?
...__name__
bound_method = func.__get__(instance, instance.__class__)
setattr(instance, as_name, bound_method)
return bound_method
class Thing:
def __init__(self, val):
self.val = val
something = Thing(21)
def double(self):
return 2 * self.val
bind(something, double)
som...
Reference assignment operator in PHP, =&
...ving a 5. However the reference link may be broken by $b =& $xyz; or unset($b); At which time $a will be the only variable that knows where the cell is that holds the 5. Also beware that if you set $a using =&, you must use =& next time (or unset($a)) to change the reference link of $a, ...
C-like structures in Python
... Your declarations under class Sample: don't immediately do anything; they set class attributes. Those can always be accessed as e.g. Sample.name.
– Channing Moore
Jun 4 '14 at 22:59
...
A variable modified inside a while loop is not remembered
In the following program, if I set the variable $foo to the value 1 inside the first if statement, it works in the sense that its value is remembered after the if statement. However, when I set the same variable to the value 2 inside an if which is inside a while statement, it's forgotten af...
List of ANSI color escape sequences
...SI escape sequences you're looking for are the Select Graphic Rendition subset. All of these have the form
\033[XXXm
where XXX is a series of semicolon-separated parameters.
To say, make text red, bold, and underlined (we'll discuss many other options below) in C you might write:
printf("\033[31;1;...
What's best SQL datatype for storing JSON string?
...baseGenerated(DatabaseGeneratedOption.Identity)]
public Guid Id { get; set; }
public string FieldJson { get; set; } //save json in this field and
[NotMapped]
public List<FieldList> FieldList // get return list from this properity
{
get => !string....
nil detection in Go
... memory is given a default initialization. Each element of such a value is set to the zero value for its type: false for booleans, 0 for integers, 0.0 for floats, "" for strings, and nil for pointers, functions, interfaces, slices, channels, and maps. This initialization is done recursively, so for ...
Trying to embed newline in a variable in bash [duplicate]
...c"
first_loop=true
for i in $var
do
p="$p\n$i" # Append
unset first_loop
done
echo -e "$p" # Use -e
Avoid extra leading newline
var="a b c"
first_loop=1
for i in $var
do
(( $first_loop )) && # "((...))" is bash specific
p="$i" || # First -&g...
How to include (source) R script in other scripts
... # load the file
assign(".files", c(file, files), envir=ENV) # set the flag
}
} else {
ENV <- attach(NULL, name=env) # create/attach new environment
sys.source(file, ENV) # load the file
assign(".files", file, envir=ENV) # set the flag
}
}
...