Elements of Lists

Mathematica provides a carefully chosen set of functions for accessing elements of lists either using indices or positions, or using patterns or criteria for their values.

list [ [ ... ] ] (Part ) — parts of lists, resettable with

Span (;; ) — general specification for spans or blocks of elements

First   ▪ Last   ▪ Rest   ▪ Most   ▪ Take   ▪ Drop   ▪ TakeWhile

Append   ▪ Prepend   ▪ Insert   ▪ Delete   ▪ AppendTo   ▪ PrependTo

Position — find positions of elements matching a pattern

Extract   ▪ ReplacePart   ▪ MapAt   ▪ ArrayRules   ▪ Ordering

Length   ▪ Dimensions   ▪ ArrayDepth   ▪ LengthWhile

Select — select elements that satisfy a criterion

Cases — give elements that match a pattern

Pick   ▪ DeleteCases   ▪ BinLists   ▪ Count   ▪ DeleteDuplicates

MemberQ — test whether an element is a member of a list

FreeQ   ▪ ArrayQ   ▪ VectorQ   ▪ MatrixQ

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