Question

How to write a regular expression for return file name by trim its extensions,

Following are my files,

externals/tinymce/plugins/emotions/img/smiley-smile.gif
externals/tinymce/plugins/emotions/img/smiley-laughing.gif
externals/tinymce/plugins/emotions/img/smiley-wink.gif
externals/tinymce/plugins/emotions/img/smiley-tongue-out.gif
externals/tinymce/plugins/emotions/img/smiley-cry.gif
externals/tinymce/plugins/emotions/img/smiley-surprised.gif
externals/tinymce/plugins/emotions/img/smiley-embarassed.gif

I would like to get filename without its extension and trim its smiley from staring using regular expresion,

Expected Outputs,

smile, laughing, wink, tongue-out, cry, surprised, embarassed

Answer 1

You can use the following regex to match the text that you are interested in:

/smiley-([^.]+)\.[^.]+$/

The smiley name will then be present in capture group 1.