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How do I get the key at a specific index from a Dictionary in Swift?
...y an implementation detail. It's very possible that you could add the key "foo" and the internal representation will completely reorder the dictionary. A dictionary is an unordered collection of key-value pairs. Therefore, the answer above is making dangerous assumptions that do not hold true.
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JavaScript code to stop form submission
...
Lots of hard ways to do an easy thing:
<form name="foo" onsubmit="return false">
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php - get numeric index of associative array
...value, if you happen to search for an int index like this:
$a = array(
"foo" => "bar",
"nice",
"car" => "fast",
"none"
);
$ind = 0;
echo array_search($ind, array_map("strval", array_keys($a)));
You will always get 0, which is wrong, so the solution would be to cast the index (if you...
Store password in TortoiseHg
...file:
[auth]
example.prefix = https://hg.example.net/
example.username = foo
example.password = bar
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Using jQuery to test if an input has focus
...
if anyone cares there is a much better way to capture focus now, $(foo).focus(...)
http://api.jquery.com/focus/
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List all base classes in a hierarchy of given class?
Given a class Foo (whether it is a new-style class or not), how do you generate all the base classes - anywhere in the inheritance hierarchy - it issubclass of?
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What is the significance of #pragma marks? Why do we need #pragma marks?
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My GCC compiler gave the warning, foo.h:52:0: warning: ignoring #pragma mark [-Wunknown-pragmas] #pragma mark -, which is not fatal. So gcc probably does not know about '-'.
– Kemin Zhou
May 4 at 20:34
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How do you debug a regex? [closed]
...n't format the output properly on Stack Overflow.)
$ perl -Mre=debug -e'"foobar"=~/(.)\1/'
Compiling REx "(.)\1"
Final program:
1: OPEN1 (3)
3: REG_ANY (4)
4: CLOSE1 (6)
6: REF1 (8)
8: END (0)
minlen 1
Matching REx "(.)\1" against "foobar"
0 <> <foobar> ...
How can I make console.log show the current state of an object?
...rse(JSON.stringify(o))
}
example usage: consoleLogWithObjectCopy('obj', {foo: 'bar'}, 1, /abc/, {a: 1})
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Why is sizeof considered an operator?
... possible if it's an operator rather than a function. For instance:
union foo {
int i;
char c[sizeof(int)];
};
Syntactically if it weren't an operator then it would have to be a preprocessor macro since functions can't take types as arguments. That would be a difficult macro to implement ...