Regular Expressions 101

^start of string

.*any character (except for line terminators), repeated any number of times

,YEAR=the literal text ,YEAR= (case sensitive)

Group 1([0-9]{4})

Character Class[0-9]{4}

{4}matches exactly 4 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

.*any character (except for line terminators), repeated any number of times

,MONTH=the literal text ,MONTH= (case sensitive)

Group 2([0-9]{1,2})

Character Class[0-9]{1,2}

{1,2}matches between 1 and 2 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

.*any character (except for line terminators), repeated any number of times

DAY_OF_MONTH=the literal text DAY_OF_MONTH= (case sensitive)

Group 3([0-9]{1,2})

Character Class[0-9]{1,2}

{1,2}matches between 1 and 2 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

.*any character (except for line terminators), repeated any number of times

$end of string, or before its final line terminator

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25 tokens

Regular Expression

^.*,YEAR=([0-9]{4}).*,MONTH=([0-9]{1,2}).*DAY_OF_MONTH=([0-9]{1,2}).*$

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