pattern: instance to skip or suppress

What is the internal difference for the software between doing an instance skip in a pattern and doing a suppress?

Robin B
Mech Eng, Montréal, Canada
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file
Upload is a website by engineers for engineers. It is not affiliated with any of manufacturers or vendors discussed here. All logos and trade names are the property of their respective owners.