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

/
/
mis

Test String

Code Generator

Language

Generated Code

import Foundation let pattern = #"(?<=var\svars).*(?=\\n\\nif \(!var)"# let regex = try! NSRegularExpression(pattern: pattern, options: [.anchorsMatchLines, .caseInsensitive, .dotMatchesLineSeparators]) let testString = ##";\n}\nvar vars = {\"uid\":\"170785079\",\"vid\":171461352,\"oid\":170785079,\"host\":509202,\"vtag\":\"493bf2f9dd\",\"ltag\":\"l_8f6ca452\",\"vkid\":171461352,\"md_title\":\"6dfdbda80019208839183a713f243a41\",\"md_author\":\"Ayxan &#399;miraslanl\",\"author_id\":170785079,\"author_href\":\"\\\/mr.ayxan\",\"hd\":3,\"no_flv\":1,\"hd_def\":-1,\"dbg_on\":0,\"t\":\"\",\"duration\":244,\"angle\":0.000000,\"img_angle\":0.000000,\"repeat\":0,\"show_ads_preroll\":0,\"show_ads_postroll\":0,\"show_ads_promo_preroll\":0,\"show_ads_overlay\":0,\"ads_type\":-1,\"legal_owner\":0,\"eid1\":0,\"slot\":0,\"g\":1,\"a\":18,\"puid34\":0,\"water_mark\":\"\",\"can_rotate\":1,\"hash\":\"19e3bc2d2ae2f2ce34f6fbaefcf93e2d\",\"hash2\":\"246f9680b9b4f835\",\"is_vk\":\"1\",\"is_ext\":\"0\",\"referrer\":\"\",\"c3\":\"\",\"sample_id\":-1,\"cat_id\":13,\"sitezone\":17,\"ads_preview\":0,\"puid4\":0,\"puid5\":14,\"puid6\":86,\"pl_type\":\"other\",\"nolikes\":1,\"lang_add\":\"Add to My Videos\",\"lang_added\":\"Video added to My Videos\",\"lang_share\":\"Share\",\"lang_like\":\"Like\",\"lang_subscribe\":\"Subscribe\",\"lang_subscribed\":\"You have subscribed\",\"lang_volume_on\":\"Unmute\",\"lang_volume_off\":\"Mute\",\"lang_volume\":\"Volume\",\"lang_hdsd\":\"Change Video Quality\",\"lang_quality_auto\":\"Auto\",\"lang_open_popup\":\"Expand\",\"lang_fullscreen\":\"Full Screen\",\"lang_window\":\"Minimize\",\"lang_rotate\":\"Rotate\",\"lang_ads_link\":\"Advertiser&#39;s Site\",\"lang_ads\":\"Ads\",\"lang_ads_skip\":\"Skip ad\",\"lang_ads_skip_time\":\"Skip ads in {time} s\",\"lang_report_problem\":\"Report a problem..\",\"lang_replay\":\"Replay\",\"lang_next_cancel\":\"Cancel\",\"video_play_hd\":\"Watch in HD\",\"video_stop_loading\":\"Stop Download\",\"video_player_version\":\"VK Video Player\",\"goto_orig_video\":\"Go to Video\",\"video_get_video_code\":\"Copy video code\",\"video_load_error\":\"The video has not uploaded yet or the server is not available\",\"video_get_current_url\":\"Copy frame link\",\"lang_next\":\"Next video\",\"url240\":\"https:\\\/\\\/cs509202.vk.me\\\/8\\\/u170785079\\\/videos\\\/493bf2f9dd.240.mp4?extra=SatA0TNoxI3a5jCGpYqhL9FIoS9kjnfIqvkVswFVnFDqJToNiAidxUb2ELSSrSEBNGEvU9Fiseuq5uEQSS_-afULYhnmxc6_vvsCA0mWSYbxDux-HA\",\"url360\":\"https:\\\/\\\/cs509202.vk.me\\\/8\\\/u170785079\\\/videos\\\/493bf2f9dd.360.mp4?extra=SatA0TNoxI3a5jCGpYqhL9FIoS9kjnfIqvkVswFVnFDqJToNiAidxUb2ELSSrSEBNGEvU9Fiseuq5uEQSS_-afULYhnmxc6_vvsCA0mWSYbxDux-HA\",\"url480\":\"https:\\\/\\\/cs509209.vk.me\\\/8\\\/u170785079\\\/videos\\\/493bf2f9dd.480.mp4?extra=SatA0TNoxI3a5jCGpYqhL9FIoS9kjnfIqvkVswFVnFDqJToNiAidxUb2ELSSrSEBNGEvU9Fiseuq5uEQSS_-afULYhnmxc6_vvsCA0mWSYbxDux-HA\",\"url720\":\"https:\\\/\\\/cs509209.vk.me\\\/8\\\/u170785079\\\/videos\\\/493bf2f9dd.720.mp4?extra=SatA0TNoxI3a5jCGpYqhL9FIoS9kjnfIqvkVswFVnFDqJToNiAidxUb2ELSSrSEBNGEvU9Fiseuq5uEQSS_-afULYhnmxc6_vvsCA0mWSYbxDux-HA\",\"jpg\":\"https:\\\/\\\/pp.vk.me\\\/c633320\\\/v633320079\\\/10dcc\\\/GDFulD47LS8.jpg\",\"timeline_thumbs\":1,\"timeline_thumbs_jpg\":\"https:\\\/\\\/pp.vk.me\\\/c628028\\\/v628028079\\\/363df\\\/FVHRrSkD6HM.jpg,https:\\\/\\\/pp.vk.me\\\/c633322\\\/v633322079\\\/f06a\\\/CjskgJb-xxU.jpg\",\"timeline_thumbs_per_row\":10,\"timeline_thumbs_per_image\":100,\"timeline_thumbs_total\":122,\"timeline_thumb_width\":133.000000,\"timeline_thumb_height\":75,\"ip_subm\":1,\"proxy\":\"psv4\",\"https\":1,\"viewer_id\":170785079,\"nologo\":1,\"show_next\":0,\"show_suggestions\":0,\"liked\":0,\"add_hash\":\"0685c16b426a731323\",\"added\":0,\"can_add\":0,\"no_title\":0,\"vsegs_size\":24.000000,\"vsegs_hash\":\"1433edfd589e9d072b\",\"module\":\"direct\",\"playlist_id\":null};\n\nif (!var"## let stringRange = NSRange(location: 0, length: testString.utf16.count) if let firstMatch = regex.firstMatch(in: testString, range: stringRange) { let result: [String] = (1 ..< firstMatch.numberOfRanges).map { (testString as NSString).substring(with: firstMatch.range(at: $0)) } print(result) } else { print("No matches were found.") }

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