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The strings over an alphabet, with the concatenation operation, form an associative algebraic structure with identity element the null string—a free monoid. Sets of strings with concatenation and alternation form a semiring, with concatenation (*) distributing over alternation (+); 0 is the empty set and 1 the set consisting of just the null ...
This prevents the comma in the actual field value (Bloggs, Fred; Doe, Jane; etc.) from being interpreted as a field separator. This necessitates a way to "escape" the field wrapper itself, in this case the double quote; it is customary to double the double quotes actually contained in a field as with those surrounding "Hank".
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COBOL uses the STRING statement to concatenate string variables. MATLAB and Octave use the syntax "[x y]" to concatenate x and y. Visual Basic and Visual Basic .NET can also use the "+" sign but at the risk of ambiguity if a string representing a number and a number are together. Microsoft Excel allows both "&" and the function "=CONCATENATE(X,Y)".
sep – A separator (in Lua regex form) used to split the lists. If empty, the lists are split into individual characters. sep1, sep2, sep3, … – Allows a different separator to be used for each list. isep – Output separator; placed between elements which were at the same index in their lists.
A stylistic depiction of values inside of a so-named comma-separated values (CSV) text file. The commas (shown in red) are used as field delimiters. A delimiter is a sequence of one or more characters for specifying the boundary between separate, independent regions in plain text, mathematical expressions or other data streams.
In documents that mix Japanese and Latin scripts, the full-width comma (U+FF0C ， FULLWIDTH COMMA) is used; this is the standard form of comma (逗号; 逗號) in China. Since East Asian typography permits commas to join dependent clauses dealing with certain topics or lines of thought, commas may be used in ways that would be considered comma ...