Polyglote troubles

Being fluent with multiple languages plays a trick on one where a construct exists in many of them, but is worded differently.

Here is an example. All C-like languages have a C style for() loop and a foreach-type loop for iterating in a collection. The former is identical in all of them, the syntax of the latter is all different. Specifically:

C++/Java: for(Type element: collection)

JavaScript†: for(element of collection)

C#: foreach(Type element in collection)

Objective C: for(Type element in collection)

PHP: foreach($collection as $element)

† In JavaScript, for(x in y) also exists but goes over indices rather than elements.

All those are languages that I have to come back to at least once a month.

Here's another good one - finding the index of the first occurrence of a character/substring in a string. Again, those are all languages that I do active work in, not an academic comparison:

• C: strchr
• JavaScript/Java/C#†: indexOf
• TSQL: CHARINDEX
• VBA: InStr
• PHP: strpos
• Excel: FIND

† Modulo capitalization.

So yes, even though I consider myself sufficiently fluent in all of those, sometimes I have to look it up.