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

// include the latest version of the regex crate in your Cargo.toml extern crate regex; use regex::Regex; fn main() { let regex = Regex::new(r"(?mis)(?<=var\svars).*(?=\\n\\nif \(!var)").unwrap(); let string = ";\\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"; // result will be a tuple containing the start and end indices for the first match in the string let result = regex.captures(string); let (start, end) = match result { Some((s, e)) => (s, e), None => { // ... } }; println!("{}", &string[start, end]); }

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 Rust, please visit: https://docs.rs/regex/latest/regex/