TheDeveloperBlog.com
C-Sharp | Java | Python | Swift | GO | WPF | Ruby | Scala | F# | JavaScript | SQL | PHP | Angular | HTML
Ruby Join Example (Convert Array to String)
Use the join method to convert a string array to a string. Specify a delimiter character.Join. Strings are everywhere in programs. And programs themselves are represented as strings. An array can contain strings—or it can be merged into a single string with delimiters.
Method notes. Join() acts on string arrays (or arrays of any type of element that are converted into strings). We can use join to round-trip our data with split().String Arrays
An example program. Consider this program. We see a string array that contains three string literals. On the string array instance we call join.
And: We specify a semicolon delimiter. The string values are merged into a single string, with a semicolon between each pair.
Ruby program that uses join
values = ["keyboard", "monitor", "CPU"]
# Use the join method to combine a string array.
joined = values.join(";")
puts joined
Output
keyboard;monitor;CPU
No delimiter. We can use join with no delimiter. This converts an array of strings (or 1-char strings which are like characters) into a string.
Ruby program that uses no delimiter
values = ["a", "b", "c"]
# Join with no delimiter.
# ... This turns an array of characters into a string.
result = values.join
puts result
Output
abc
A review. With split() and join() we can round-trip our data processing. We have a string, and can split it apart. Then we modify elements, and join it together again.Split
© TheDeveloperBlog.com
The Dev Codes
Related Links:
- Ruby Convert Types: Arrays and Strings
- Ruby File Handling: File and IO Classes
- Ruby Regexp Match Method
- Ruby String Array Examples
- Ruby include: Array Contains Method
- Ruby Class Examples: Self, Super and Module
- Ruby DateTime Examples: require date
- Ruby 2D Array Examples
- Ruby Number Examples: Integer, Float, zero and eql
- Ruby Exception Examples: Begin and Rescue
- Top 65 Ruby Interview Questions (2021)
- Ruby on Rails Interview Questions (2021)
- Ruby String Examples (each char, each line)
- Ruby if Examples: elsif, else and unless
- Ruby Math Examples: floor, ceil, round and truncate
- Ruby Sub, gsub: Replace String
- Ruby Substring Examples
- Ruby Console: Puts, Print and stdin
- Ruby Remove Duplicates From Array
- Ruby Random Number Generator: rand, srand
- Ruby Recursion Example
- Ruby ROT13 Method
- Ruby Iterator: times, step Loops
- Ruby String Length, For Loop Over Chars
- Ruby Join Example (Convert Array to String)
- Ruby Format String Examples
- Ruby Copy Array Example
- Ruby Keywords
- Ruby Nil Value Examples: NoMethodError
- Learn Ruby Tutorial
- Ruby Method: Def, Arguments and Return Values
- Ruby Fibonacci Sequence Example
- Ruby Hash Examples
- Ruby While, Until and For Loop Examples
- Learn Ruby on Rails Tutorial
- Ruby Word Count: Split Method
- Ruby Sort Arrays (Use Block Syntax)
- Ruby Case Examples: Ranges, Strings and Regexp
- Ruby Array Examples
- Ruby Split String Examples