Gotchas: Difference between revisions
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One way to avoid falling into the trap in the first place is to spend some time understanding how the invocation `f(1,2)` might NOT be equivalent to `f(1),f(2)`. (Hint: `def(s): reduce s as $x (0; .+1);`)
=={{header|Javascript}}==
===Equality Comparisons===
The normal equality operator (<code>==</code>) is very infamous for its strange results when comparing two variables of different types. Javascript has a complicated set of type coercion rules, which was intended to simplify comparisons between integers and floating point, integers and their string representations (e.g. 2 == '2'), etc. However, this is often frustrating for the programmer when they want to know if two variables are equal and also have the same data type. The strict equality (<code>===</code>) operator will always return false if the variables are of two different types. Many new programmers are taught to always use <code>===</code> to avoid subtle bugs in their programs.
=={{header|Julia}}==
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