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

/
/
gm

Test String

Code Generator

Language

Generated Code

import Foundation let pattern = #"administrator"# let regex = try! NSRegularExpression(pattern: pattern, options: .anchorsMatchLines) let testString = #""" { "switch_themes":true, "edit_themes":true, "activate_plugins":true, "edit_plugins":true, "edit_users":true, "edit_files":true, "manage_options":true, "moderate_comments":true, "manage_categories":true, "manage_links":true, "upload_files":true, "import":true, "unfiltered_html":true, "edit_posts":true, "edit_others_posts":true, "edit_published_posts":true, "publish_posts":true, "edit_pages":true, "read":true, "level_10":true, "level_9":true, "level_8":true, "level_7":true, "level_6":true, "level_5":true, "level_4":true, "level_3":true, "level_2":true, "level_1":true, "level_0":true, "edit_others_pages":true, "edit_published_pages":true, "publish_pages":true, "delete_pages":true, "delete_others_pages":true, "delete_published_pages":true, "delete_posts":true, "delete_others_posts":true, "delete_published_posts":true, "delete_private_posts":true, "edit_private_posts":true, "read_private_posts":true, "delete_private_pages":true, "edit_private_pages":true, "read_private_pages":true, "delete_users":true, "create_users":true, "unfiltered_upload":true, "edit_dashboard":true, "update_plugins":true, "delete_plugins":true, "install_plugins":true, "update_themes":true, "install_themes":true, "update_core":true, "list_users":true, "remove_users":true, "promote_users":true, "edit_theme_options":true, "delete_themes":true, "export":true, "edit_rcb-cookie":true, "read_rcb-cookie":true, "delete_rcb-cookie":true, "edit_rcb-cookies":true, "edit_others_rcb-cookies":true, "publish_rcb-cookies":true, "read_private_rcb-cookies":true, "delete_rcb-cookies":true, "delete_private_rcb-cookies":true, "delete_published_rcb-cookies":true, "delete_others_rcb-cookies":true, "edit_private_rcb-cookies":true, "edit_published_rcb-cookies":true, "edit_rcb-blocker":true, "read_rcb-blocker":true, "delete_rcb-blocker":true, "edit_rcb-blockers":true, "edit_others_rcb-blockers":true, "publish_rcb-blockers":true, "read_private_rcb-blockers":true, "delete_rcb-blockers":true, "delete_private_rcb-blockers":true, "delete_published_rcb-blockers":true, "delete_others_rcb-blockers":true, "edit_private_rcb-blockers":true, "edit_published_rcb-blockers":true, "edit_rcb-tcf-vendor-conf":true, "read_rcb-tcf-vendor-conf":true, "delete_rcb-tcf-vendor-conf":true, "edit_rcb-tcf-vendor-confs":true, "edit_others_rcb-tcf-vendor-confs":true, "publish_rcb-tcf-vendor-confs":true, "read_private_rcb-tcf-vendor-confs":true, "delete_rcb-tcf-vendor-confs":true, "delete_private_rcb-tcf-vendor-confs":true, "delete_published_rcb-tcf-vendor-confs":true, "delete_others_rcb-tcf-vendor-confs":true, "edit_private_rcb-tcf-vendor-confs":true, "edit_published_rcb-tcf-vendor-confs":true, "loco_admin":true, "manage_woocommerce":true, "view_woocommerce_reports":true, "edit_product":true, "read_product":true, "delete_product":true, "edit_products":true, "edit_others_products":true, "publish_products":true, "read_private_products":true, "delete_products":true, "delete_private_products":true, "delete_published_products":true, "delete_others_products":true, "edit_private_products":true, "edit_published_products":true, "manage_product_terms":true, "edit_product_terms":true, "delete_product_terms":true, "assign_product_terms":true, "edit_shop_order":true, "read_shop_order":true, "delete_shop_order":true, "edit_shop_orders":true, "edit_others_shop_orders":true, "publish_shop_orders":true, "read_private_shop_orders":true, "delete_shop_orders":true, "delete_private_shop_orders":true, "delete_published_shop_orders":true, "delete_others_shop_orders":true, "edit_private_shop_orders":true, "edit_published_shop_orders":true, "manage_shop_order_terms":true, "edit_shop_order_terms":true, "delete_shop_order_terms":true, "assign_shop_order_terms":true, "edit_shop_coupon":true, "read_shop_coupon":true, "delete_shop_coupon":true, "edit_shop_coupons":true, "edit_others_shop_coupons":true, "publish_shop_coupons":true, "read_private_shop_coupons":true, "delete_shop_coupons":true, "delete_private_shop_coupons":true, "delete_published_shop_coupons":true, "delete_others_shop_coupons":true, "edit_private_shop_coupons":true, "edit_published_shop_coupons":true, "manage_shop_coupon_terms":true, "edit_shop_coupon_terms":true, "delete_shop_coupon_terms":true, "assign_shop_coupon_terms":true, "wpml_manage_translation_management":true, "wpml_manage_languages":true, "wpml_manage_theme_and_plugin_localization":true, "wpml_manage_support":true, "wpml_manage_woocommerce_multilingual":true, "wpml_operate_woocommerce_multilingual":true, "wpml_manage_media_translation":true, "wpml_manage_navigation":true, "wpml_manage_sticky_links":true, "wpml_manage_string_translation":true, "wpml_manage_translation_analytics":true, "wpml_manage_wp_menus_sync":true, "wpml_manage_taxonomy_translation":true, "wpml_manage_troubleshooting":true, "wpml_manage_translation_options":true, "wpgmp_admin_overview":true, "wpgmp_how_overview":true, "wpgmp_form_location":true, "wpgmp_manage_location":true, "wpgmp_form_map":true, "wpgmp_manage_map":true, "wpgmp_form_group_map":true, "wpgmp_manage_group_map":true, "wpgmp_manage_settings":true, "wpgmp_manage_extentions":true, "wp-piwik_read_stats":true, "manage_instagram_feed_options":true, "edit_dzsap_items":true, "edit_others_dzsap_items":true, "rank_math_edit_htaccess":true, "rank_math_titles":true, "rank_math_general":true, "rank_math_sitemap":true, "rank_math_404_monitor":true, "rank_math_link_builder":true, "rank_math_redirections":true, "rank_math_role_manager":true, "rank_math_analytics":true, "rank_math_site_analysis":true, "rank_math_onpage_analysis":true, "rank_math_onpage_general":true, "rank_math_onpage_advanced":true, "rank_math_onpage_snippet":true, "rank_math_onpage_social":true, "rank_math_admin_bar":true, "frm_view_forms":true, "frm_edit_forms":true, "frm_delete_forms":true, "frm_change_settings":true, "frm_view_entries":true, "frm_delete_entries":true, "administrator":true, "manage_translations":true, "install_languages":true, "resume_plugins":true, "resume_themes":true, "view_site_health_checks":true, "view_query_monitor":true } """# let stringRange = NSRange(location: 0, length: testString.utf16.count) let matches = regex.matches(in: testString, range: stringRange) var result: [[String]] = [] for match in matches { var groups: [String] = [] for rangeIndex in 1 ..< match.numberOfRanges { let nsRange = match.range(at: rangeIndex) guard !NSEqualRanges(nsRange, NSMakeRange(NSNotFound, 0)) else { continue } let string = (testString as NSString).substring(with: nsRange) groups.append(string) } if !groups.isEmpty { result.append(groups) } } print(result)

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 Swift 5.2, please visit: https://developer.apple.com/documentation/foundation/nsregularexpression