Regular Expressions 101

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/
^\s*((?:(?:['"([{](?:[^'"()[\]{}]*|['"([{](?:[^'"()[\]{}]*|['"([{][^'"()[\]{}]*['")}\]])*['")}\]])*['")}\]])|[^,])*?)?\s*(?:,\s*((?:(?:['"([{](?:[^'"()[\]{}]*|['"([{](?:[^'"()[\]{}]+|['"([{][^'"()[\]{}]*['")}\]])*['")}\]])*['")}\]])|[^,])*?))?\s*(?:,\s*((?:(?:['"([{](?:[^'"()[\]{}]*|['"([{](?:[^'"()[\]{}]+|['"([{][^'"()[\]{}]*['")}\]])*['")}\]])*['")}\]])|[^,])*?))?\s*$
/
g
^ asserts position at start of the string
\s
matches any whitespace character (equivalent to [\r\n\t\f\v ])
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
1st Capturing Group
((?:(?:['"([{](?:[^'"()[\]{}]*|['"([{](?:[^'"()[\]{}]*|['"([{][^'"()[\]{}]*['")}\]])*['")}\]])*['")}\]])|[^,])*?)?
? matches the previous token between zero and one times, as many times as possible, giving back as needed (greedy)
Non-capturing group
(?:(?:['"([{](?:[^'"()[\]{}]*|['"([{](?:[^'"()[\]{}]*|['"([{][^'"()[\]{}]*['")}\]])*['")}\]])*['")}\]])|[^,])*?
*? matches the previous token between zero and unlimited times, as few times as possible, expanding as needed (lazy)
1st Alternative
(?:['"([{](?:[^'"()[\]{}]*|['"([{](?:[^'"()[\]{}]*|['"([{][^'"()[\]{}]*['")}\]])*['")}\]])*['")}\]])
Non-capturing group
(?:['"([{](?:[^'"()[\]{}]*|['"([{](?:[^'"()[\]{}]*|['"([{][^'"()[\]{}]*['")}\]])*['")}\]])*['")}\]])
Match a single character present in the list below
['"([{]
'"([{
matches a single character in the list '"([{ (case sensitive)
Non-capturing group
(?:[^'"()[\]{}]*|['"([{](?:[^'"()[\]{}]*|['"([{][^'"()[\]{}]*['")}\]])*['")}\]])*
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
1st Alternative
[^'"()[\]{}]*
Match a single character not present in the list below
[^'"()[\]{}]
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
'"()[
matches a single character in the list '"()[ (case sensitive)
\] matches the character ] with index 9310 (5D16 or 1358) literally (case sensitive)
{}
matches a single character in the list {} (case sensitive)
2nd Alternative
['"([{](?:[^'"()[\]{}]*|['"([{][^'"()[\]{}]*['")}\]])*['")}\]]
Match a single character present in the list below
['"([{]
'"([{
matches a single character in the list '"([{ (case sensitive)
Non-capturing group
(?:[^'"()[\]{}]*|['"([{][^'"()[\]{}]*['")}\]])*
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
1st Alternative
[^'"()[\]{}]*
Match a single character not present in the list below
[^'"()[\]{}]
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
'"()[
matches a single character in the list '"()[ (case sensitive)
\] matches the character ] with index 9310 (5D16 or 1358) literally (case sensitive)
{}
matches a single character in the list {} (case sensitive)
2nd Alternative
['"([{][^'"()[\]{}]*['")}\]]
Match a single character present in the list below
['"([{]
'"([{
matches a single character in the list '"([{ (case sensitive)
Match a single character not present in the list below
[^'"()[\]{}]
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
'"()[
matches a single character in the list '"()[ (case sensitive)
\] matches the character ] with index 9310 (5D16 or 1358) literally (case sensitive)
{}
matches a single character in the list {} (case sensitive)
Match a single character present in the list below
['")}\]]
'")}
matches a single character in the list '")} (case sensitive)
\] matches the character ] with index 9310 (5D16 or 1358) literally (case sensitive)
Match a single character present in the list below
['")}\]]
'")}
matches a single character in the list '")} (case sensitive)
\] matches the character ] with index 9310 (5D16 or 1358) literally (case sensitive)
Match a single character present in the list below
['")}\]]
'")}
matches a single character in the list '")} (case sensitive)
\] matches the character ] with index 9310 (5D16 or 1358) literally (case sensitive)
2nd Alternative
[^,]
Match a single character not present in the list below
[^,]
, matches the character , with index 4410 (2C16 or 548) literally (case sensitive)
\s
matches any whitespace character (equivalent to [\r\n\t\f\v ])
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
Non-capturing group
(?:,\s*((?:(?:['"([{](?:[^'"()[\]{}]*|['"([{](?:[^'"()[\]{}]+|['"([{][^'"()[\]{}]*['")}\]])*['")}\]])*['")}\]])|[^,])*?))?
? matches the previous token between zero and one times, as many times as possible, giving back as needed (greedy)
, matches the character , with index 4410 (2C16 or 548) literally (case sensitive)
\s
matches any whitespace character (equivalent to [\r\n\t\f\v ])
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
2nd Capturing Group
((?:(?:['"([{](?:[^'"()[\]{}]*|['"([{](?:[^'"()[\]{}]+|['"([{][^'"()[\]{}]*['")}\]])*['")}\]])*['")}\]])|[^,])*?)
Non-capturing group
(?:(?:['"([{](?:[^'"()[\]{}]*|['"([{](?:[^'"()[\]{}]+|['"([{][^'"()[\]{}]*['")}\]])*['")}\]])*['")}\]])|[^,])*?
*? matches the previous token between zero and unlimited times, as few times as possible, expanding as needed (lazy)
1st Alternative
(?:['"([{](?:[^'"()[\]{}]*|['"([{](?:[^'"()[\]{}]+|['"([{][^'"()[\]{}]*['")}\]])*['")}\]])*['")}\]])
Non-capturing group
(?:['"([{](?:[^'"()[\]{}]*|['"([{](?:[^'"()[\]{}]+|['"([{][^'"()[\]{}]*['")}\]])*['")}\]])*['")}\]])
Match a single character present in the list below
['"([{]
'"([{
matches a single character in the list '"([{ (case sensitive)
Non-capturing group
(?:[^'"()[\]{}]*|['"([{](?:[^'"()[\]{}]+|['"([{][^'"()[\]{}]*['")}\]])*['")}\]])*
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
1st Alternative
[^'"()[\]{}]*
Match a single character not present in the list below
[^'"()[\]{}]
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
'"()[
matches a single character in the list '"()[ (case sensitive)
\] matches the character ] with index 9310 (5D16 or 1358) literally (case sensitive)
{}
matches a single character in the list {} (case sensitive)
2nd Alternative
['"([{](?:[^'"()[\]{}]+|['"([{][^'"()[\]{}]*['")}\]])*['")}\]]
Match a single character present in the list below
['"([{]
'"([{
matches a single character in the list '"([{ (case sensitive)
Non-capturing group
(?:[^'"()[\]{}]+|['"([{][^'"()[\]{}]*['")}\]])*
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
1st Alternative
[^'"()[\]{}]+
Match a single character not present in the list below
[^'"()[\]{}]
+ matches the previous token between one and unlimited times, as many times as possible, giving back as needed (greedy)
'"()[
matches a single character in the list '"()[ (case sensitive)
\] matches the character ] with index 9310 (5D16 or 1358) literally (case sensitive)
{}
matches a single character in the list {} (case sensitive)
2nd Alternative
['"([{][^'"()[\]{}]*['")}\]]
Match a single character present in the list below
['"([{]
'"([{
matches a single character in the list '"([{ (case sensitive)
Match a single character not present in the list below
[^'"()[\]{}]
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
'"()[
matches a single character in the list '"()[ (case sensitive)
\] matches the character ] with index 9310 (5D16 or 1358) literally (case sensitive)
{}
matches a single character in the list {} (case sensitive)
Match a single character present in the list below
['")}\]]
'")}
matches a single character in the list '")} (case sensitive)
\] matches the character ] with index 9310 (5D16 or 1358) literally (case sensitive)
Match a single character present in the list below
['")}\]]
'")}
matches a single character in the list '")} (case sensitive)
\] matches the character ] with index 9310 (5D16 or 1358) literally (case sensitive)
Match a single character present in the list below
['")}\]]
'")}
matches a single character in the list '")} (case sensitive)
\] matches the character ] with index 9310 (5D16 or 1358) literally (case sensitive)
2nd Alternative
[^,]
Match a single character not present in the list below
[^,]
, matches the character , with index 4410 (2C16 or 548) literally (case sensitive)
\s
matches any whitespace character (equivalent to [\r\n\t\f\v ])
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
Non-capturing group
(?:,\s*((?:(?:['"([{](?:[^'"()[\]{}]*|['"([{](?:[^'"()[\]{}]+|['"([{][^'"()[\]{}]*['")}\]])*['")}\]])*['")}\]])|[^,])*?))?
? matches the previous token between zero and one times, as many times as possible, giving back as needed (greedy)
, matches the character , with index 4410 (2C16 or 548) literally (case sensitive)
\s
matches any whitespace character (equivalent to [\r\n\t\f\v ])
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
3rd Capturing Group
((?:(?:['"([{](?:[^'"()[\]{}]*|['"([{](?:[^'"()[\]{}]+|['"([{][^'"()[\]{}]*['")}\]])*['")}\]])*['")}\]])|[^,])*?)
Non-capturing group
(?:(?:['"([{](?:[^'"()[\]{}]*|['"([{](?:[^'"()[\]{}]+|['"([{][^'"()[\]{}]*['")}\]])*['")}\]])*['")}\]])|[^,])*?
*? matches the previous token between zero and unlimited times, as few times as possible, expanding as needed (lazy)
1st Alternative
(?:['"([{](?:[^'"()[\]{}]*|['"([{](?:[^'"()[\]{}]+|['"([{][^'"()[\]{}]*['")}\]])*['")}\]])*['")}\]])
Non-capturing group
(?:['"([{](?:[^'"()[\]{}]*|['"([{](?:[^'"()[\]{}]+|['"([{][^'"()[\]{}]*['")}\]])*['")}\]])*['")}\]])
Match a single character present in the list below
['"([{]
'"([{
matches a single character in the list '"([{ (case sensitive)
Non-capturing group
(?:[^'"()[\]{}]*|['"([{](?:[^'"()[\]{}]+|['"([{][^'"()[\]{}]*['")}\]])*['")}\]])*
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
1st Alternative
[^'"()[\]{}]*
Match a single character not present in the list below
[^'"()[\]{}]
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
'"()[
matches a single character in the list '"()[ (case sensitive)
\] matches the character ] with index 9310 (5D16 or 1358) literally (case sensitive)
{}
matches a single character in the list {} (case sensitive)
2nd Alternative
['"([{](?:[^'"()[\]{}]+|['"([{][^'"()[\]{}]*['")}\]])*['")}\]]
Match a single character present in the list below
['"([{]
'"([{
matches a single character in the list '"([{ (case sensitive)
Non-capturing group
(?:[^'"()[\]{}]+|['"([{][^'"()[\]{}]*['")}\]])*
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
1st Alternative
[^'"()[\]{}]+
Match a single character not present in the list below
[^'"()[\]{}]
+ matches the previous token between one and unlimited times, as many times as possible, giving back as needed (greedy)
'"()[
matches a single character in the list '"()[ (case sensitive)
\] matches the character ] with index 9310 (5D16 or 1358) literally (case sensitive)
{}
matches a single character in the list {} (case sensitive)
2nd Alternative
['"([{][^'"()[\]{}]*['")}\]]
Match a single character present in the list below
['"([{]
'"([{
matches a single character in the list '"([{ (case sensitive)
Match a single character not present in the list below
[^'"()[\]{}]
Match a single character present in the list below
['")}\]]
Match a single character present in the list below
['")}\]]
'")}
matches a single character in the list '")} (case sensitive)
\] matches the character ] with index 9310 (5D16 or 1358) literally (case sensitive)
Match a single character present in the list below
['")}\]]
'")}
matches a single character in the list '")} (case sensitive)
\] matches the character ] with index 9310 (5D16 or 1358) literally (case sensitive)
2nd Alternative
[^,]
Match a single character not present in the list below
[^,]
, matches the character , with index 4410 (2C16 or 548) literally (case sensitive)
\s
matches any whitespace character (equivalent to [\r\n\t\f\v ])
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
$ asserts position at the end of the string, or before the line terminator right at the end of the string (if any)
Global pattern flags
g modifier: global. All matches (don't return after first match)
Your regular expression does not match the subject string.Try launching the debugger to find out why.

Regular Expression
No Match

/
/
g

Test String

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