Regular Expressions 101

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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression
No Match

/
/
m

Test String

Code Generator

Language

Generated Code

package main import ( "regexp" "fmt" ) func main() { var re = regexp.MustCompile(`(?m)^Plan A:\s+(?<plan_a>[\w\W]+?)\s+Plan B:\s+(?<plan_b>[\w\W]+?)\s+Plan C:\s+(?<plan_c>[\w\W]+)`) var str = `Plan A: North Island Exploration Day 1: Explore Auckland - Morning: Visit the Auckland War Memorial Museum - Lunch: Try local cuisine at Depot Eatery & Oyster Bar - Afternoon: Take a ferry to Waiheke Island for wine tasting - Dinner: Dine at The Grove - Accommodation: Rydges Auckland - Estimated expenses: $150 per person - Contingency plan: Visit indoor attractions in case of bad weather Day 2: Rotorua Adventure - Morning: Visit Te Puia and see Pohutu Geyser - Lunch: Have a traditional Maori lunch at Tamaki Maori Village - Afternoon: Explore Wai-O-Tapu Thermal Wonderland - Dinner: Enjoy a dinner cruise on Lake Rotorua - Accommodation: Millennium Hotel Rotorua - Estimated expenses: $200 per person - Contingency plan: Visit a nearby spa for relaxation if outdoor activities are hindered by bad weather Day 3: Taupo and Tongariro National Park - Morning: Take a cruise on Lake Taupo - Lunch: Grab a bite at The Brantry - Afternoon: Visit Tongariro National Park for hiking - Dinner: Dine at Plateau Restaurant - Accommodation: Suncourt Hotel & Conference Centre Taupo - Estimated expenses: $180 per person - Contingency plan: Explore local museums or go shopping in case of bad weather Day 4: Wellington City Tour - Morning: Visit Te Papa Museum - Lunch: Try local food at Ortega Fish Shack - Afternoon: Explore Wellington Botanic Garden - Dinner: Dine at Shed 5 - Accommodation: QT Wellington - Estimated expenses: $160 per person - Contingency plan: Visit art galleries or attend cultural performances indoors if outdoor sightseeing is not feasible Day 5: Return to Auckland - Morning: Fly back to Auckland - Lunch: Enjoy a meal at The Sugar Club overlooking the city - Afternoon: Explore shopping at Queen Street - Estimated expenses: $100 per person - Contingency plan: Visit indoor markets or shopping centers if outdoor activities are limited Plan B: South Island Adventure Day 1: Arrival in Queenstown - Afternoon: Visit Skyline Queenstown for panoramic views - Dinner: Dine at Rata Dining - Accommodation: Novotel Queenstown Lakeside - Estimated expenses: $150 per person - Contingency plan: Explore local wineries or take a scenic drive in case of bad weather Day 2: Milford Sound - Morning: Take a scenic bus tour to Milford Sound - Lunch: Have a picnic at the waterfront - Afternoon: Cruise through the fjords - Dinner: Enjoy seafood at Fergburger - Accommodation: Milford Sound Lodge - Estimated expenses: $250 per person - Contingency plan: Visit local museums or galleries if outdoor activities are not possible Day 3: Wanaka and Mount Aspiring National Park - Morning: Visit Puzzling World in Wanaka - Lunch: Dine at Urban Grind Cafe - Afternoon: Explore Mount Aspiring National Park - Dinner: Enjoy a meal at The Big Fig - Accommodation: Edgewater Hotel - Estimated expenses: $180 per person - Contingency plan: Visit local cafes or bookstores for indoor relaxation if outdoor exploration is hampered by bad weather Day 4: Glacier Country - Morning: Visit Fox Glacier and go hiking - Lunch: Grab food at The Last Kitchen - Afternoon: Explore Franz Josef Glacier - Dinner: Dine at Alice May - Accommodation: Scenic Hotel Franz Josef Glacier - Estimated expenses: $200 per person - Contingency plan: Visit local hot pools or spa for relaxation if outdoor activities are hindered by bad weather Day 5: Return to Queenstown - Morning: Drive back to Queenstown - Lunch: Eat at Botswana Butchery - Afternoon: Visit Arrowtown for shopping - Estimated expenses: $100 per person - Contingency plan: Explore local art galleries or attend cultural performances indoors if outdoor activities are limited Plan C: North and South Island Highlights Day 1: Arrival in Christchurch - Afternoon: Visit the Canterbury Museum - Dinner: Dine at Pescatore - Accommodation: The George Christchurch - Estimated expenses: $150 per person - Contingency plan: Explore local cafes or bookstores if outdoor activities are hindered by bad weather Day 2: Arthur's Pass National Park - Morning: Take a scenic drive to Arthur's Pass - Lunch: Have a meal at the Alpine Restaurant - Afternoon: Explore the national park and go hiking - Dinner: Enjoy dinner at Devils Punchbowl Cafe - Accommodation: Wilderness Lodge Arthur's Pass - Estimated expenses: $200 per person - Contingency plan: Visit local museums or galleries if outdoor activities are not possible Day 3: Marlborough Wine Region - Morning: Drive to Marlborough region for wine tasting - Lunch: Dine at Hans Herzog - Afternoon: Visit vineyards for tasting - Dinner: Enjoy a meal at Arbour - Accommodation: Marlborough Vintners Hotel - Estimated expenses: $180 per person - Contingency plan: Visit a local market or shop for souvenirs in case of bad weather Day 4: Abel Tasman National Park - Morning: Visit Abel Tasman National Park for kayaking - Lunch: Grab a meal at Hooked on Marahau - Afternoon: Explore the coastal trails - Dinner: Dine at The Park Cafe - Accommodation: Parklands Marina Holiday Park - Estimated expenses: $220 per person - Contingency plan: Visit local spas or hot pools for relaxation if outdoor activities are limited due to bad weather Day 5: Return to Christchurch - Morning: Drive back to Christchurch - Lunch: Eat at 27 Steps - Afternoon: Explore Christchurch Botanic Gardens - Estimated expenses: $100 per person - Contingency plan: Visit local art galleries or attend cultural performances indoors if outdoor activities are not feasible.` if len(re.FindStringIndex(str)) > 0 { fmt.Println(re.FindString(str),"found at index",re.FindStringIndex(str)[0]) } }

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Golang, please visit: https://golang.org/pkg/regexp/