peek_front: Peek at the Front Element
In Immutables: Fast and Functional Data Structures
View source: R/30-api-flexseq-ends.R
peek_front R Documentation
Peek at the Front Element
Description
Returns the first element without modifying the sequence.
Usage
peek_front(x)
Arguments
x
A flexseq.
Details
Returns the payload element without modifying x.
Value
First element, or NULL when x is empty.
Examples
x <- flexseq("a", "b", "c")
peek_front(x)
peek_front(flexseq())
Immutables documentation built on April 29, 2026, 1:06 a.m.
R Package Documentation
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View source: R/30-api-flexseq-ends.R
| peek_front | R Documentation |
Peek at the Front Element
Description
Returns the first element without modifying the sequence.
Usage
peek_front(x)
Arguments
x |
A |
Details
Returns the payload element without modifying x.
Value
First element, or NULL when x is empty.
Examples
x <- flexseq("a", "b", "c")
peek_front(x)
peek_front(flexseq())
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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