All we need to do is open a csv file read it and parse it using the csv parser that comes with ruby.
Open csv url ruby.
If you don t know how the ruby file class works.
You open a csv file for read write or append mode and use either or puts to append a new line.
Reads each record from the csv file.
This is what a csv file looks like.
Ruby comes with a standard library called csv to make it easy to read files with comman separated values csv file in this csv file the 3rd fields in every row is a number.
Call dup before passing if you need a new string.
Name age sex john 28 m julie 19 f adrienne 42 f rob 16 m first off i create the csv file above and saved it as test csv.
If enc is given convert str to the encoding before percent encoding.
Creates a person object to represent that record.
Prints the array back out in sorted order in csv format.
Csv ruby 2 6 1.
Let s say we want to import a csv file that contains the fields.
Defines a simple ruby person class with the help of a struct.
Adds the new person object to an array of person s.
Because roo uses the standard csv library you can use options available to that library to parse csv files.
Require csv csv read favorite foods csv or you can parse a string with csv.
Note that a passed string is modified by this method.
Id name 1 chocolate 2 bacon 3 apple 4 banana 5 almonds now you re going to learn how to use the ruby csv library to read write csv files.
This method wraps a string you provide or an empty default string in a csv object which is passed to the provided block.
Sorts the array by the last name field.
Ruby comes with a built in csv library.
This method doesn t convert 0 9 a z a z but does convert sp ascii space to and converts others to xx.
You can use the block to append csv rows to the string and when the block exits the final string will be returned.
You can read a file directly.
For instance you can load tab delimited files tsv and you can use a particular encoding when opening the file.
How ruby sees csv files.
Next we need to get started with ruby.
