Expression ^#?([a-f]|[A-F]|[0-9]){3}(([a-f]|[A-F]|[0-9]){3})?$ Description Tests for valid HTML hexadecimal color codes. The # symbol is optional. And it will except either the 3 digit form for the 216 Web safe colors, or the full 6 digit form. I am use it on my site to allow users to customize the site's colors. Matches #00ccff | #039 | ffffcc Non-Matches blue | 0x000000 | #ff000 Expression \b(([01]?\d?\d|2[0-4]\d|25[0-5])\.){3}([01]?\d?\d|2[0-4]\d|25[0-5])\b Description Most Concise RegExp for matching Decimal IPs. If nothing else, it'll make your code easier to read. (And I know that \d?\d is \d{1,2} but that's 2 extra characters.) --Update: darkone noticed 8 characters could be shaved down. I've edited it to reflect this. Thanks, darkone! Matches 217.6.9.89 | 0.0.0.0 | 255.255.255.255 Non-Matches 256.0.0.0 | 0978.3.3.3 | 65.4t.54.3 Expression ^\d*\.?((25)|(50)|(5)|(75)|(0)|(00))?$ Description This is a pattern to search and verify that a decimal number ends with a 25, 50, 75, 0 or 00. It does match for a nothing after decimal also but I guess thats ok !! Matches 0.25 | .75 | 123.50 Non-Matches .77 | 1.435 Expression ^\d{0,2}(\.\d{1,2})?$ Description This regular expression validates that the data entered is a number with a maximum of two integers and two decimals and a minimum of one integer or one decimal. Matches 99.99 | 99 | .99 Non-Matches 999.999 | 999 | .999 Expression ^([0-9a-fA-F][0-9a-fA-F]:){5}([0-9a-fA-F][0-9a-fA-F])$ Description This will grep for a valid MAC address , with colons seperating octets. It will ignore strings too short or long, or with invalid characters. It will accept mixed case hexadecimal. Use extended grep. Matches 01:23:45:67:89:ab | 01:23:45:67:89:AB | fE:dC:bA:98:76:54 Non-Matches 01:23:45:67:89:ab:cd | 01:23:45:67:89:Az | 01:23:45:56: Expression (?!^0*$)(?!^0*\.0*$)^\d{1,5}(\.\d{1,3})?$ Description This regular expression validates a number NOT 0, with no more than 5 places ahead and 3 places behind the decimal point. Matches 1 | 12345.123 | 0.5 Non-Matches 0 | 0.0 | 123456.1234 Expression ^[+-]?([0-9]*\.?[0-9]+|[0-9]+\.?[0-9]*)([eE][+-]?[0-9]+)?$ Description A regular expression that matches numbers. Integers or decimal numbers with or without the exponential form. Matches 23 | -17.e23 | +.23e+2 Non-Matches +.e2 | 23.17.5 | 10e2.0 Expression ^\d*[0-9](|.\d*[0-9]|,\d*[0-9])?$ Description This is permit all decimal number, exclude all alphanumeric caracter Matches 123456.123456 | 123456,123456 | 123456 Non-Matches 123a.123 | 123a,123 | a Expression (^\d*\.?\d*[1-9]+\d*$)|(^[1-9]+\d*\.\d*$) Description Accepts only positive decimal values. Zero and negatvie numbers are non-matching. Allows zeros after last non-zero numeric value after decimal place for significant digits. Matches 0.050 | 5.0000 | 5000 Non-Matches 0 | 0.0 | .0 Expression ^\s*(?'num'\d+(\.\d+)?)\s*(?'unit'((w(eek)?)|(wk)|(d(ay)?)|(h(our)?)|(hr))s?)(\s*$) Description Validates Microsoft Project-type duration entries. Accepts a number and a unit. The number part can be integer or decimal. The unit can be several variations of weeks, days, and hours: e.g., w, wk, week, ws, wks, weeks are all valid. Whitespace between the number and the unit is optional: e.g., 1d, 2 days, 3.5w are all valid. Captures the number value in a group named num and the unit string in a group named 'unit'. Matches 1 day | 3.5 w | 6hrs Non-Matches 1 | 6. days | 1 week 2 d Expression [0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3} Description Very Simple Match for dotted Decimal IP address. Doesn’t Validate addresses Matches 192.168.1.1 | 10.2.234.1 | 66.129.71.122 Non-Matches 192.168.1 | 10.2.1234.1 | 66 129 71 122 Expression ^\s*(((\d*\.?\d*[0-9]+\d*)|([0-9]+\d*\.\d*) )\s*[xX]\s*){2}((\d*\.?\d*[0-9]+\d*)|([0-9]+\d*\.\d*))\s*$ Description This validates Length times Width times Height measurements, which consists of 3 whole or decimal numbers separated by an x. Matches 1.1 x 4.35 x 5.0 | 1 x 2 x 3 | 4.75 x 300.25 x 0 Non-Matches z.56 x 6 x 7 | 1 xx 2 x 3 | 1 by 2 by 3 Expression ^[-]?([1-9]{1}[0-9]{0,}(\.[0-9]{0,2})?|0(\.[0-9]{0,2})?|\.[0-9]{1,2})$ Description This regular expression will match on a real / decimal / floating point / numeric string with no more than 2 digits past the decimal. The negative sign (-) is allowed. No leading zeroes or commas. It is based on a currency regular expression by Tom Persing. Matches 123 | 123.54 | -.54 Non-Matches 123.543 | 0012 | 1,000.12 Expression ^\d+(?:\.\d{0,2})?$ Description Matches positive whole numbers with exactly zero or two decimal points if a . is present. Useful for checking currency amounts, such 5 or 5.00 or 5.25. Matches 1 | 1.23 | 1234.45 Non-Matches a1.34 | 1.23a | a Expression ^(?:(?:25[0-5]|2[0-4]\d|[01]\d\d|\d?\d)(?(?=\.?\d)\.)){4}$ Description Regular expression for validating a decimal IP address. Matches 4 groups of from 1 to 3 digits, where each group of digits ranges from 0 to 255 in value. Groups of digits must be separated by a single period (.) with no other formatting characters present. Uses conditional regex with lookahead syntax to prevent a match on a period following the final group of digits. Matches 217.6.9.89 | 0.0.0.0 | 255.255.255.255 Non-Matches 256.0.0.0 | 0127.3 | 217.6.9.89. Expression (?n:(^\$?(?!0,?\d)\d{1,3}(?=(?<1>,)|(?<1>))(\k<1>\d{3})*(\.\d\d)?)$) Description Regular expression for validating a US currency string field. Matches an unlimited number of digits to the left of an optional decimal point. Digits to the left of the decimal point can optionally be formatted with commas, in standard US currency format. If the decimal point is present, it must be followed by exactly two digits to the right. Matches an optional preceding dollar sign. Uses regex lookahead to preclude leading zeros and to match the optional formatting comma. Matches $3,023,123.34 | 9,876 | 123456.78 Non-Matches 0.002 | $01.00 | ###1.00 Expression ^(((\d{1,3})(,\d{3})*)|(\d+))(.\d+)?$ Description validates numbers, with or without decimal places, and comma 1000 separators. Matches 9999999 | 99999.99999 | 99,999,999.9999 Non-Matches 9999. | 9,99,99999.999 | 999.9999.9999 Expression (^N/A$)|(^[-]?(\d+)(\.\d{0,3})?$)|(^[-]?(\d{1,3},(\d{3},)*\d{3}(\.\d{1,3})?|\d{1,3}(\.\d{1,3})?)$) Description This pattern matches a decimal value with up to 3 digits after the decimal. Comma is allowed as a thousands separator but not required. N/A is also allowed. Matches 405.234 | 50 | 213123.456 | -1 | N/A Non-Matches bathreader | this is N/A | 3.14159 | +10 Expression ^[0-9]*[1-9]+$|^[1-9]+[0-9]*$ Description This Expression checks if the value is an integer, positive, not zero and not a decimal. Very handy for use when people need to fill in whole numbers, like when ordering car parts on a website (you dont want your customers to order -10 tires or 0.7 mirrors.. Matches 1 | 00000428123 | 1230000 Non-Matches 0 | 00000000 | any text or +, - or any other character Expression ^(\-)?\d*(\.\d+)?$ Description Matches all positive decimal floating negative/non-negative numbers. Allows empty string. Matches 0.55 | 21232.00 | -89.20 Non-Matches asdf | +0.33 Expression (?=([\W]*[\w][\W]*\b))\s(?=\d\.|\d\b) Description This RegExp matches a space (" ") character with lookahead condition if there is an ASCII text in front of it and it is followed by a single decimal number which in turn is followed by a dot or nothing. It's useful to seperate scientific notation numbers from a text, i.e. when classifying with the bow toolkit. [EDIT 18.09.2004] There was indeed an error in the second lookahead. Changed |\b to |\d\b Matches ROOT 4.873624764e-34 | `1234567 890-= 3.8765e-34543 | ~! @ # $ % ^ & ( % )_+ 3.345e-2384754 Non-Matches rstuvwxyz 754.234e-23 | yz754.234e-23 | yz .234e-23 Expression ^\s*-?(\d*\.)?([0-2])?[0-9]:([0-5])?[0-9]:([0-5])?[0-9](\.[0-9]{1,7})?\s*$ Description This should be the pattern described in the documentation for the .NET TimeSpan.Parse method - generally parses time spans. From the .NET docs: public static TimeSpan Parse(string s); The s parameter contains a specification of the form: [ws][-][d.]hh:mm:ss[.ff][ws] Items in square brackets ([ and ]) are optional, colons and periods (: and .) are literal characters, and other items are as follows. Item Description ws optional white space "-" optional minus sign indicating a negative time "d" optional days "hh" hours, ranging from 0 to 23 "mm" minutes, ranging from 0 to 59 "ss" seconds, ranging from 0 to 59 "ff" optional fractional seconds, from 1 to 7 decimal digits Matches 10:12:34 | 932323.9:00:32.3420 Expression (?:(?:(?<Feet>\d+)[ ]*\'){0,1}[ ]*(?<WholeInches>\d*(?![/\w])){0,1}(?:[ ,\-]){0,1}(?<Fraction>\d*\/\d*){0,1}(?<Decimal>\.\d*){0,1}\")|(?:(?<Feet>\d+)[ ]*\'[ ]*){1} Description I needed an expression to extract measurements from text to extract steel sizes from product descriptions, and I came up with this. It will only match on measurements that have complete dimensions (i.e. measurements with foot and inch marks in the positions you'd expect them). My personal experience required that I also be a little lax and allow measurements such as: .125 (for wall thicknesses and sheet metal thicknesses) with no inch marks. You can accomplish this by including: |(?<Decimal>\.\d{3}\"*) to the end of the expression Hope it helps you. Matches 1/4" x 2.125" Flat 44W x 20'3.5" | 1/8" x 4" C-1018 flat x 14' 5-1/4" Non-Matches 44W | 8 @ 21 W.F. beam | 1/4 x 2.125 Flat 44W x 20 Expression ^\s*(\d{0,2})(\.?(\d*))?\s*\%?\s*$ Description Basically this matches into variables for percentages.. It allows as much whitespace before and after the expression. $1 = Percent before decimal, $2 = percentage after decimal inc decimal, $3 = percentage after decimal. Disallowed anything past 99.99999 repeating percent. No negative percents either. Easy to implement but I do not need it. Matches 10.5%, 1%, 1, .5, .0555% Non-Matches 100%, -1%, -1, 200, 200.1 Expression ^[-+]?(\d?\d?\d?,?)?(\d{3}\,?)*(\.?\d+)$ Description This pattern matches decimal values. It supports option leading positive or negative symbols. Supports commas where only the leading group can have less than three numbers. Matches +1.0 | -3 | 1,234.00 | 1,234,567 Non-Matches A | 1,23 | 1,23,456 Expression ^[\+\-]?[0-9]+([\,\.][0-9]+)?$ Description Accepts integer and decimal numbers, the decimal delimiter beeing either a point or a comma, prefixed or not by a plus or minus sign. Matches «1» «-1» «+1» «1.0» «-1.0» «+1.0» «1,0» «-1,0» «+1,0» Non-Matches «abc» «1e2» Expression ^\$?(([1-9],)?([0-9]{3},){0,3}[0-9]{3}|[0-9]{0,16})(\.[0-9]{0,3})?$ Description Currency expression, accepts 4 commas and 4 groups of 3 numbers and 1 number before the first comma, this first number will have to be different from zero. It accepts a number of, two or three decimal. It accepts zero numbers after the point. You can change the number of groups and numbers accespts before and after the point. Matches 1234.23 | 1,234.245 | 1. Non-Matches 12,12,0.00 | 0,123.99 Expression ^[0-9]%?$|^1[0-9]%?$|^2[0-9]%?$|^3[0-5]%?$|^[0-9]\.\d{1,2}%?$|^1[0-9]\.\d{1,2}%?$|^2[0-9]\.\d{1,2}%?$|^3[0-4]\.\d{1,2}%?$|^35%?$ Description A range of numbers 0-35 optionally including a percent sign and 2 position decimal. Matches 32.34%, 32.34, 32, 32% Non-Matches 32.345%, 36, .34 Expression ^([-+]?(\d+\.?\d*|\d*\.?\d+)([Ee][-+]?[0-2]?\d{1,2})?[r]?|[-+]?((\d+\.?\d*|\d*\.?\d+)([Ee][-+]?[0-2]?\d{1,2})?)?[i]|[-+]?(\d+\.?\d*|\d*\.?\d+)([Ee][-+]?[0-2]?\d{1,2})?[r]?[-+]((\d+\.?\d*|\d*\.?\d+)([Ee][-+]?[0-2]?\d{1,2})?)?[i])$ Description DESCRIPTION Parses a complex number of kind 'a+bi' from an input string. Please remove all spaces from the input string before using this regex pattern. MATCHING EXAMPLES '[]' means is an optional parameter; '|' means OR; '+' is the positive sign; '-' is the negative sign; '#' is one ore more decimal digits; 'E|e' are the valid exponent symbols; '...' is the range for the exponent; 'r' means the real part of complex number; 'i' means the imaginary part of complex number. NOTE Has the imaginary part of the input string not a numeric value (e.g. '5-i' is a valid format) it should be interpreted as '5-1i'! Matches [+|-]#[.[#]]|[#].#[E|e[+|-]0...299][r] -OR- [+|-][#[.[#]]|[#].#[E|e[+|-]0...299]]i -OR- [+|-]#[.[#]]|[#].#[E|e[+|-]0...299][r]+|-[#[.[#]]|[#].#[E|e[+|-]0...299]]i Non-Matches [+|-][.][E|e[+|-][0...299]][r] -OR- [+|-].[E|e[+|-][0...299]]i -OR- [+|-][.][E|e[+|-][0...299]][r]+|-[#[.[#]]|[#].#[E|e[+|-][0...299]]]i -OR- any number with more than one sign or decimal seperator -OR- any string with non-leading signs on mantissa and on exponent Title Test Details Floating Number Expression ^([-+]?(\d+\.?\d*|\d*\.?\d+))$ Description DESCRIPTION Parses a floating number (such as double or float) from an input string. Please remove all spaces from the input string before using this regex pattern. MATCHING EXAMPLES The following symbols are used: '[]' means optional parameter; '|' means OR; '+' is the positive sign; '-' is the negative sign; '#' means one or more decimal digits; '.' is decimal seperator. Matches [+|-]#[.[#]]|[#].# Non-Matches [+|-][.] -OR- any floating number with an exponent (e.g. 1.0E-8) -OR- any string with more than one sign or decimal seperator -OR- any string with non-leading sign Title Test Details Floating Number With Exponent Expression ^([-+]?(\d+\.?\d*|\d*\.?\d+)([Ee][-+]?[0-2]?\d{1,2})?)$ Description DESCRIPTION Parses a floating number with an optional exponent from an input string. Please remove all spaces from the input string before using this regex pattern. MATCHING EXAMPLES The following symbols are used: '[]' means an optional parameter; '|' means OR; '+' means the positive sign; '-' means the negative sign; '#' means one or more numbers (0...9); '.' is the decimal seperator; 'E|e' are the valid exponent symbols; '...' is the range of values for the exponent. Matches [+|-]#[.[#]]|[#].#[E|e[+|-]0...299] Non-Matches [+|-][.][E|e[+|-][0...299]] -OR- [+|-]#[.[#]]|[#].#E|e[+|-]300...∞ -OR- any string with more than one sign on mantissa or on exponent -OR- any string with non-leading signs on mantissa or exponent -OR- any string with more than one decimal seperator on mantissa | any string with one or more decimal seperators on exponent Title Test Details All valid Guid(s) Expression [({]?(0x)?[0-9a-fA-F]{8}([-,]?(0x)?[0-9a-fA-F]{4}){2}((-?[0-9a-fA-F]{4}-?[0-9a-fA-F]{12})|(,\{0x[0-9a-fA-F]{2}(,0x[0-9a-fA-F]{2}){7}\}))[)}]? Description It matches all strings that the .NET Framework API "new Guid(string guid)" can recognize. A String that contains a GUID in one of the following formats ('d' represents a hexadecimal digit whose case is ignored): Matches ca761232ed4211cebacd00aa0057b223 | CA761232-ED42-11CE-BACD-00AA0057B223 | {CA761232-ED42-11CE-BACD-00AA0057B223} | (CA761232-ED42-11CE-BACD-00AA0057B223) | {0xCA761232,0xED42,0x11CE,{0xBA,0xCD,0x00,0xAA,0x00,0x57,0xB2,0x23}} Non-Matches Invalid guids Title Test Details Colon-delimited string of positive integers and/or decimal numbers Expression ^(([1-9][0-9]*)|((([0])|([1-9][0-9]*))\.[0-9]+)|((([1-9][0-9]*)|((([0])|([1-9][0-9]*))\.[0-9]+))\:)*(([1-9][0-9]*)|((([0])|([1-9][0-9]*))\.[0-9]+)))$ Description Accepts a colon-delimited string of positive integers and/or decimal numbers in any combination. Spaces are not permitted. Decimal numbers of less than 1 must be prefixed with a zero (e.g. accepts 0.1, but not .1), and numbers with a trailing decimal point are not accepted (e.g. accepts 3.0, but not 3.). A lone zero is not accpeted (e.g. accepts 1.02:3:4.5, but not 1.02:0:4.5). Developed from a similar expression by Steven Smith on this site. Matches 1.2 | 0.1:0.5:56:6.70 | 3:6.78954:1:2:3 Non-Matches 0.1:.5:56 | -6.70:3. | 5: 0.1:0 Title Test Details Currency with two decimals Expression ^\$\d{1,3}(,?\d{3})*(\.\d{2})?$ Description Looks for a number which can be optionally comma separated at thousands and may or may not have two decimal places. Tweaking: 1. Replace the \$ symbol with your currency. 2. Toggle , and . as separators (Some European countries follow this convention) 3. Mandate comma separation by removing the ? after , Matches $333,444,444,555.99 Non-Matches $333,444,444,55 Title Test Details HTML HEX Characters codes Expression &#x((?=.*[ABCDEF]))*((?=.*[0-9]))*.{2,5}; Description This pattern matches any HTML character code in hexadecimal format. Doesn't match numerical code such as &#203; or any friendly code character such as &nbsp; Matches &#x1DE; &#x111; &#xCA; Non-Matches &#203; &Ecirc; Title Test Details Metric and Time Dimensions Expression (?<Nbr>[\+-]?((\d*\,\d+)|(\d*\.\d+)|\d+))\s*(?<Unit>mm|cm|dm|min|km|s|m|h) Description Matches decimal numbers (english or german writing) followed by metric or time units (mm, cm, dm, m, km, s, min and h) in labels surrounded by any digit. Matches 345,3m, 345.m, 345m, 345,5 m Title Test Details Decimal Number Expression ^([1-9]([0-9])?)(\.(([0])?|([1-9])?|[1]([0-1])?)?)?$ Description Expression to match decimal number with 2 digits. Matches 1.0, 1.1 .. 1.11 ... 99.0, 99.1, 99.2, ... 99.11 Non-Matches 0, 0.0. 0.11, 99.12, 1.12, 100, 100.11 Title Test Details Feet-inch to Decimal Expression (?:(?:(?<Feet>\d+)[ ]*(?:'|ft)){0,1}[ ]*(?<Inches>\d*(?![/\w])){0,1}(?:[ ,\-]){0,1}(?<Fraction>(?<FracNum>\d*)\/(?<FracDem>\d*)){0,1}(?<Decimal>\.\d*){0,1}(?:\x22| in))|(?:(?<Feet>\d+)[ ]*(?:'|ft)[ ]*){1} Description I needed an expression that would break down a written measurement, like 12' 2-15/16", into groups of feet, inches, fractional inches (num/dem). This is a modified expression based on Trevor Braun's orginal regex. Added the "ft" & "in" suffixes and the fraction's Numerator & Denominator groups. Matches 1ft 2-3/4 in, 2' 3 4/5", 3ft, 4', 5 in, 6", 7.125 in, 3ft 4.5 in Title Test Details Decimals with optional positive/negative sign, miles separator (,) and exponential notation Expression /^[-+]?((\d*|((\d{1,3})?,(\d{3},)*(\d{3})))?)(\.\d*)?([eE][-+]\d+)?$/ Description Valids decimal numbers with optional support for: 1.- Use a positive/negative sign (123.78 -123.09 +0.123 are valid) 2.- Use a miles separator (12345.789 12,345.099 +12,345 are valid) 2.- Use a exponential notation (+0.123E+4 -12.345e-4 are valid) Matches 123.78 -123.09 +0.123 12345.789 12,345.099 +0.123E+4 Non-Matches 56,88 12e3 09,98.99
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