1 Eczema is not a single disease but a reaction pattern of the skin produced by a number conditions. 2  Atopic dermatitis, a common causes of eczema, is more prevalent in those with asthma and hay fever. 3  Eczema appears as small blisters that can weep and ooze, or as crusted, thickened plaques of skin.
concatenation (kÉnËkÃ¦tÉªËneÉªÊÉn) n 1. a series of interconnected events, concepts, etc 2. the act of linking together or the state of being joined 3. (Logic) logic a function that forms a single string of symbols from two given strings by placing the second after the first.
In many programming languages, string concatenation is a binary infix operator. The + (plus) operator is often overloaded to denote concatenation for string arguments: Hello,  + World has the value Hello, World. In other languages there is a separate operator, particularly to specify implicit type conversion to string, as opposed to more complicated behavior for generic plus. Examples include . in Edinburgh IMP, Perl, and PHP, and & in Ada and Visual Basic. Other syntax exists, like || in PL/I and Oracle Database SQL.