Golang : Repeat a character by multiple of x factor
In Python, it is pretty easy to repeat some characters inside a string. All you need to do is to multiply the letter with an integer value and the letter will be multiplied/repeated by x number of times
For example:
str = ''.join(['a' * 1, 'b' * 1, 'c' * 2, 'd' * 3, 'e' * 2, 'f' * 4, \
'g' * 5, 'h' * 6, 'i' * 3, 'j' * 7, 'k' * 8, 'l' * 9, 'm' * 10, \
'n' * 11, 'o' * 4, 'p' * 12, 'q' * 13, 'r' * 14, 's' * 15, \
't' * 16, 'u' * 5, 'w' * 17, 'y' * 18, 'z' * 19])
will produce:
abccdddeeffffggggghhhhhhiiijjjjjjjkkkkkkkklllllllllmmmmmmmmmmnnnnnnnnnnnoo
ooppppppppppppqqqqqqqqqqqqqrrrrrrrrrrrrrrsssssssssssssssttttttttttttttttuuuuuw
wwwwwwwwwwwwwwwwyyyyyyyyyyyyyyyyyyzzzzzzzzzzzzzzzzzzz
However, it is not permissible to multiply a letter with integer in Golang. Doing so will generate error such as invalid operation: "join" * 2 (mismatched types string and int)
.
To create multiple instances/repeatition of a letter in Golang, you will have to use the strings.Repeat()
function.
Example:
package main
import (
"fmt"
"strings"
)
func main() {
str := []string{"a", "b", "c", "d", "e"}
fmt.Println(strings.Join(str, " "))
// Python way of repeating string by multiple of x will
// not work here
//str2 := []string{"a" * 2, "b", "c", "d", "e"}
// Golang's way of multiplying a string by x factor
str2 := []string{strings.Repeat("a", 2), "b", "c", "d", "e"}
fmt.Println(strings.Join(str2, " "))
a2 := strings.Repeat("a", 2)
b3 := strings.Repeat("b", 3)
c4 := strings.Repeat("c", 4)
d5 := strings.Repeat("d", 5)
e9 := strings.Repeat("e", 9)
str3 := []string{a2, b3, c4, d5, e9}
fmt.Println(strings.Join(str3, " "))
}
Output:
a b c d e
aa b c d e
aa bbb cccc ddddd eeeeeeeee
References:
https://www.socketloop.com/tutorials/golang-how-to-join-strings
By Adam Ng
IF you gain some knowledge or the information here solved your programming problem. Please consider donating to the less fortunate or some charities that you like. Apart from donation, planting trees, volunteering or reducing your carbon footprint will be great too.
Advertisement
Tutorials
+72k Golang : How to return HTTP status code?
+33.6k Golang : Save image to PNG, JPEG or GIF format.
+8.9k Android Studio : Simple input textbox and intercept key example
+31.5k Delete a directory in Go
+9.2k Generate Random number with math/rand in Go
+7.7k nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
+14.7k Golang : Generate QR codes for Google Authenticator App and fix "Cannot interpret QR code" error
+12.8k Golang : ROT47 (Caesar cipher by 47 characters) example
+5.5k Golang : Gargish-English language translator
+5.7k How to let Facebook Login button redirect to a particular URL ?
+9.2k Golang : Meaning of omitempty in struct's field tag
+8.9k CodeIgniter : Load different view for mobile devices