Sow[e] specifies that e should be collected by the nearest enclosing Reap. Sow[e, tag] specifies that e should be collected by the nearest enclosing Reap whose pattern ...

Applying transformation rules. The replacement operator /. (pronounced "slash-dot") applies rules to expressions. You can give a list of rules to apply. Each rule will be ...

ColorRules is an option for ArrayPlot which specifies how colors of cells should be determined from values.

Protect[s_1, s_2, ...] sets the attribute Protected for the symbols s_i. Protect["form_1", "form_2", ...] protects all symbols whose names match any of the string patterns ...

StringTrim["string"] trims whitespace from the beginning and end of " string".StringTrim["string", patt] trims substrings matching patt from the beginning and end.

UnsetShared[s_1, s_2, ...] stops the sharing of the variables or functions s_i among parallel kernels.UnsetShared[patt] stops the sharing of all variables and functions whose ...

Tally[list] tallies the elements in list, listing all distinct elements together with their multiplicities.Tally[list, test] uses test to determine whether pairs of elements ...

SQLStringMatchQ[col, patt] specifies a condition in an SQL query used to test whether the value of a column matches a pattern. The actual format for the pattern varies from ...

Save["filename", symbol] appends definitions associated with the specified symbol to a file. Save["filename", " form"] appends definitions associated with all symbols whose ...

Simplifying expressions. Mathematica does not automatically simplify an algebraic expression like this. Simplify performs the simplification.