Regular Expressions 101

Pro

^start of line

Non-Capturing Group(?:[^\r\n,]*[^\r\n\s,]\s*,)+

+repeats the group contents below at least once:

Negated Character Class[^\r\n,]*

*matches any number of characters outside the set below:

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Negated Character Class[^\r\n\s,]

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

\sany whitespace character

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\s*any whitespace character, repeated any number of times

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Negated Character Class[^\r\n,]+

+matches at least one character outside the set below:

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

$end of line

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

26 tokens

Regular Expression

^(?:[^\r\n,]*[^\r\n\s,]\s*,)+[^\r\n,]+$

New

Invalid, hello,,,,,,
Invalid, hello, world, , how, are, you
Invalid, hello, world , , how, are, you
Valid, hello, world ,  how, are, you
     Valid      , hello       ,    world ,  how       , are, you
Invalid, hello, world,
Valid, Hello, World
Valid, Hello, World, how are you, doing, today
Valid, .5 cups, 1.5 cups
Valid, .5 cups, 1.5 cups
Valid, .5 cups, .
Valid,., .
.,.,.,.,.,.