Polygonia comma Polygonia comma Polygonia comma, the eastern comma, is a North American butterfly in the family Nymphalidae, subfamily Nymphalinae. This butterfly is seasonally variable. The upperside of the summer form's hindwings are all black, whereas the winter forms hindwings are reddish orange. The underside of both forms is striped with dark and light brown. There is a silvery comma mark in the middle of the hindwing in both forms. Its wingspan is . The eastern comma may be spotted in woods near rivers, ponds, marshes, swamps, and other water sources. This butterfly seldom visits flowers, but rather feeds on sap, rotting
Comma operator Comma operator In the C and C++ programming languages, the comma operator (represented by the token codice_1) is a binary operator that evaluates its first operand and discards the result, and then evaluates the second operand and returns this value (and type). The use of the comma token as an is distinct from its use in function calls and definitions, variable declarations, enum declarations, and similar constructs, where it acts as a . The comma operator separates "expressions" (which have value) in a way analogous to how the semicolon terminates "statements," and sequences of expressions are enclosed in parentheses analogously