Concatenate strings together

Source: R/string_concat.R

Concatenate strings together.

<!-- %&amp;% -->
string_concat(a, b, ...)
string_prefix(s, prefix)
string_suffix(s, suffix)
string_flag(s, flag, width, which = c('left', 'right', 'both'))
string_flagv(s, ...)

Arguments

a

A string (character) vector.
b

A string (character) vector.
...

Parameters passed to paste0() or string_flag().
s

A string (character) vector.
collapse

A string by which to separate the elements of a vector.
flag

Character or number to append to a string.
width

Number of characters a string should be.
which

Side to flag a string.

Value

Character vector.

Details

The %&% operator acts similar to BASIC's &, concatenating two elements together. For more general usage, use string_concat(), whose optional inputs get passed to paste0().

string_prefix() and its synonyms prefix a string to a vector, while string_suffix() and its synonyms suffix a string to a vector.

string_flag() is a scalar function that appends a character or number to a string if it does not meet a specified width.

string_flagv() is a vectorized version of string_flag().

The synonym pattern of these functions are s_*() and *() (replace asterisks with prefix, suffix, and flag(v)).

See also

https://github.com/robertschnitman/stringops

Examples

"a" %&% "b"
#> [1] "ab"
string_prefix(rownames(mtcars), "A")
#>  [1] "AMazda RX4"           "AMazda RX4 Wag"       "ADatsun 710"         
#>  [4] "AHornet 4 Drive"      "AHornet Sportabout"   "AValiant"            
#>  [7] "ADuster 360"          "AMerc 240D"           "AMerc 230"           
#> [10] "AMerc 280"            "AMerc 280C"           "AMerc 450SE"         
#> [13] "AMerc 450SL"          "AMerc 450SLC"         "ACadillac Fleetwood" 
#> [16] "ALincoln Continental" "AChrysler Imperial"   "AFiat 128"           
#> [19] "AHonda Civic"         "AToyota Corolla"      "AToyota Corona"      
#> [22] "ADodge Challenger"    "AAMC Javelin"         "ACamaro Z28"         
#> [25] "APontiac Firebird"    "AFiat X1-9"           "APorsche 914-2"      
#> [28] "ALotus Europa"        "AFord Pantera L"      "AFerrari Dino"       
#> [31] "AMaserati Bora"       "AVolvo 142E"         
string_suffix(rownames(mtcars), "Z")
#>  [1] "Mazda RX4Z"           "Mazda RX4 WagZ"       "Datsun 710Z"         
#>  [4] "Hornet 4 DriveZ"      "Hornet SportaboutZ"   "ValiantZ"            
#>  [7] "Duster 360Z"          "Merc 240DZ"           "Merc 230Z"           
#> [10] "Merc 280Z"            "Merc 280CZ"           "Merc 450SEZ"         
#> [13] "Merc 450SLZ"          "Merc 450SLCZ"         "Cadillac FleetwoodZ" 
#> [16] "Lincoln ContinentalZ" "Chrysler ImperialZ"   "Fiat 128Z"           
#> [19] "Honda CivicZ"         "Toyota CorollaZ"      "Toyota CoronaZ"      
#> [22] "Dodge ChallengerZ"    "AMC JavelinZ"         "Camaro Z28Z"         
#> [25] "Pontiac FirebirdZ"    "Fiat X1-9Z"           "Porsche 914-2Z"      
#> [28] "Lotus EuropaZ"        "Ford Pantera LZ"      "Ferrari DinoZ"       
#> [31] "Maserati BoraZ"       "Volvo 142EZ"         
string_flag('123456789', '0', 10)
#> [1] "0123456789"