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How are echo and print different in PHP? [duplicate]
...e to use print() only for situations like:
echo 'Doing some stuff... ';
foo() and print("ok.\n") or print("error: " . getError() . ".\n");
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f...
What would a “frozen dict” be?
... x == y
True
>>> x == {'a': 1, 'b': 2}
True
>>> d = {x: 'foo'}
>>> d[y]
'foo'
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How do you organise multiple git repositories, so that all of them are backed up together?
...synchronizing between the multiple parties:
$ cd ~/dev
$ git clone /repos/foo.git # or the one from github, ...
$ cd foo
$ git remote add github ...
$ git remote add memorystick ...
You can then fetch/pull from each of the "sources", work and commit
locally, and then push ("backup") to each...
General suggestions for debugging in R
...
to see the call stack. Here is an example.
> options(warn = 2)
> foo <- function(x) bar(x + 2)
> bar <- function(y) warning("don't want to use 'y'!")
> foo(1)
Error in bar(x + 2) : (converted from warning) don't want to use 'y'!
> traceback()
7: doWithOneRestart(return(expr)...
__getattr__ on a module
...ule via m = ModuleType("mod") and set m.__getattr__ = lambda attr: return "foo"; however, when I run from mod import foo, I get TypeError: 'module' object is not iterable.
– weberc2
Jan 14 at 22:49
...
- how to allow only one item selected?
...rmal select:
<select name="mySelect" size="3">
<option>Foo</option>
<option>Bar</option>
<option>Foo Bar</option>
<option>Bar Foo</option>
</select>
Fiddle
...
ReSharper warns: “Static field in generic type”
...urse we wouldn't normally have public fields, but...
public static int Foo;
}
public class Test
{
public static void Main()
{
Generic<string>.Foo = 20;
Generic<object>.Foo = 10;
Console.WriteLine(Generic<string>.Foo); // 20
}
}
As you can ...
Mutable vs immutable objects
...e can have a number of different meanings. For example, suppose an object foo has a field int[] arr, and it holds a reference to a int[3] holding the numbers {5, 7, 9}. Even though the type of the field is known, there are at least four different things it can represent:
A potentially-shared ref...
Remove excess whitespace from within a string
...ce of multiple whitespaces " "* with a single whitespace " ".
Example:
$foo = preg_replace('/\s+/', ' ', $foo);
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Select objects based on value of variable in object using jq
...
How would I get the parent 'FOO', 'BAR', 'BAZ'?
– spazm
Jun 15 '16 at 18:13
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