Pass by reference problem with PHP 5.3.1 [duplicate]

I just experienced this same problem, calling bind_param via call_user_func_array and passing an array of parameters. The solution is to modify the values in the array to be referenced. It’s not elegant but it works. call_user_func_array(array($stmt, ‘bind_param’), makeValuesReferenced($passArray)); function makeValuesReferenced($arr){ $refs = array(); foreach($arr as $key => $value) $refs[$key] = &$arr[$key]; return $refs; }

Rust lifetime error expected concrete lifetime but found bound lifetime

Let’s compare the two definitions. First, the trait method: fn to_c<‘a>(&self, r: &’a Ref) -> Container<‘a>; And the implementation: fn to_c(&self, r: &’a Ref) -> Container<‘a>; See the difference? The latter doesn’t have <‘a>. <‘a> has been specified elsewhere; the fact that it has the same name does not matter: it is a different thing … Read more

What is an idiomatic way to collect an iterator of &T into a collection of Ts?

Is a bicycle an idiomatic way to get from one city to another? Like most things in software (and life), it depends. If your type implements Copy I’d prefer these in this order: some_iter.copied() some_iter.cloned()|&v| v)|v| *v)|v| v.clone()) If your type implements Clone I’d prefer these in this order: some_iter.cloned() … Read more

When should I not implement a trait for references to implementors of that trait?

when shouldn’t I implement this? Asked another way, why doesn’t the compiler automatically implement this for me? Since it currently doesn’t, I assume there must be cases where having this implementation would be disadvantageous. As an example, the Default trait immediately came to mind. pub trait Default { fn default() -> Self; } I could … Read more