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Emoji hash

Source: R/hash.R
hash_emoji.Rd

Emoji hash

Usage

hash_emoji(x, size = 3)

hash_raw_emoji(x, size = 3)

hash_obj_emoji(x, size = 3, serialize_version = 2)

Arguments

x

Character vector. NA entries will have an NA hash.

size

Number of emojis to use in a hash. Currently it has to be from 1 through 4.

serialize_version

Workspace format version to use, see base::serialize().

Value

hash_emoji() returns a data frame with columns

  • hash: the emoji hash, a string of the requested size.

  • emojis: list column with the emoji characters in character vectors. Note that an emoji might have multiple code points.

  • text: text representation of hash, comma separated.

  • names: list column with the text representations of emojis, in character vectors.

hash_raw_emoji() and hash_obj_emoji() return a list with entries:

  • hash: the emoji hash, a string of requested size,

  • emojis: the individual emoji characters in a character vector,

  • text: text representation of hash, comma separated,

  • names: names of the emojis, in a character vector.

Details

It uses the first 13 hexadecimal characters (out of the 32) of the MD5 hash of the input, and converts them into an emoji representation. It uses a manually selected subset of all emojis, that tend to be displayed correctly.

Number of possible hash values

cli uses 2280 possible emojis. This is the number of different hashes you can get for different values of size:

sizesize of hash table space
12,280
25,198,400
311,852,352,000
427,023,362,560,000

hash_raw_emoji() calculates the emoji hash of the bytes of a raw vector.

hash_obj_emoji() calculates the emoji hash of an R object. The object is serialized into a binary vector first.

See also

the emoji package for a comprehensive list of emojis

Other hash functions: hash_animal(), hash_md5(), hash_sha1(), hash_sha256(), hash_xxhash()

Examples

hash_emoji(c("foo", NA, "bar", ""))$text
#> [1] "sun behind cloud, raised back of hand: dark skin tone, children crossing"
#> [2] NA                                                                        
#> [3] "man pilot: medium-light skin tone, flag: Afghanistan, keycap: *"         
#> [4] "teacup without handle, rhinoceros, flushed face"                         

# if you increase `size`, the shorter hash is a prefix of the longer:
hash_emoji("foobar", 1)$text
#> [1] "fishing pole"
hash_emoji("foobar", 2)$text
#> [1] "fishing pole, money with wings"
hash_emoji("foobar", 3)$text
#> [1] "fishing pole, money with wings, eagle"
hash_emoji("foobar", 4)$text
#> [1] "fishing pole, money with wings, eagle, dog face"