Question

Give the best regular expression for each of the following in / delimited form. For example, the regular expression to find a string that is a single “a” would be /^a$/

You may NOT use the negation syntax in the format (?!)

1. Find a regular expression that will find strings that start with anything but the empty string and contains the string apple.

Answer 1

The regular expression is: 
^(?!\s*$).+a{1}p{2}l{1}e{1}

The first half of the expression will check for the string is empty or not and the second half of the expression would check for the word "apple".