从javascript表达式中提取单词或字符？

Question

I want to know how to extract words or characters from expression in JavaScript or jquery.

For example

 if a expression is (3.14*radius*radius)

result should be "radius", "radius"

if a expression is (width*length)

result should be "width", "length"

same if a expression is 3.14/radius*(length)/yaxis

result should be "radius", "length", "yaxis"

I have tried different regular expressions on stackoverflow and google but I can't find any. How can I do that?

Answer 1

只需使用一个简单的正则表达式：

var tokens = yourString.match(/[a-z]+/g);