Select & replace a random word in javascript

Question

I'd like to write a code in javascript that selects a random word from a text, and replaces it for another word.

Here's my code:

var text = "dog cat apple stone";
var keyword = text[Math.floor(Math.random()*text.length)]; // select random word
var new_phrase = text.replace( keyword, "house"); // replace for other word

document.write("<p>" + text + "</p>" );
document.write("<p>" + new_phrase + "</p>");

However, this replaces a letter in the text not a word. Like this: "dog chouset apple stone"

How can I select a random word not a letter?

stackoverflow.com/questions/10447943/…

Hanky Panky
– Hanky Panky

2013-01-14 08:55:49 +00:00
Commented Jan 14, 2013 at 8:55 — Hanky Panky
– Hanky Panky, Commented Jan 14, 2013 at 8:55
you are not selecting a word, you are getting a char

Tomas Ramirez Sarduy
– Tomas Ramirez Sarduy

2013-01-14 09:02:17 +00:00
Commented Jan 14, 2013 at 9:02 — Tomas Ramirez Sarduy
– Tomas Ramirez Sarduy, Commented Jan 14, 2013 at 9:02

KooiInc · Accepted Answer · 2013-01-14 08:59:14Z

2

Using text[someIndex] you are selecting one character from text. Try splitting the string and use the resulting array:

var text = "dog cat apple stone"
   ,txttmp = text.split(/\s+/)
   ,keyword = txttmp[Math.floor(Math.random()*txttmp.length)];

answered Jan 14, 2013 at 8:59

KooiInc

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user160820 · Accepted Answer · 2013-01-14 08:59:14Z

1

Accoring to Kepp it Simple principle i would say

var text = "dog cat apple stone";
arrText = text.split(" ");

it will give you and array of words back. After replacing any word in array you can again use

arrText.join(" ");

answered Jan 14, 2013 at 8:59

user160820

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Johan Öbrink · Accepted Answer · 2013-01-14 09:09:07Z

0

Using an array

http://www.w3schools.com/jsref/jsref_obj_array.asp

you can store the values and then refer back to them with an index and get the value back.

var text=["dog","cat","apple", "stone"];

var keyword = Math.floor((Math.random()*text.length)); 
text[keyword] = "house"; // replace for other word

document.write("<p>" + text + "</p>" );

answered Jan 14, 2013 at 9:09

Johan Öbrink

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