peek_key: Peek First Element for One Key
In Immutables: Fast and Functional Data Structures
View source: R/50-ordered_sequence-ops.R
peek_key R Documentation
Peek First Element for One Key
Description
Returns the first element whose key equals key.
Usage
peek_key(x, key)
Arguments
x
An ordered_sequence.
key
Query key.
Details
For duplicate keys, this returns the first element in stable sequence order.
Value
Matched element, or NULL when no matching key exists.
Examples
x <- ordered_sequence("a", "b", "c", keys = c(1, 2, 2))
peek_key(x, 2)
peek_key(x, 10)
Immutables documentation built on April 29, 2026, 1:06 a.m.
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View source: R/50-ordered_sequence-ops.R
| peek_key | R Documentation |
Peek First Element for One Key
Description
Returns the first element whose key equals key.
Usage
peek_key(x, key)
Arguments
x |
An |
key |
Query key. |
Details
For duplicate keys, this returns the first element in stable sequence order.
Value
Matched element, or NULL when no matching key exists.
Examples
x <- ordered_sequence("a", "b", "c", keys = c(1, 2, 2))
peek_key(x, 2)
peek_key(x, 10)
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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