wild card

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Related to wildcard: wildcard mask

wild card

1. See wild (sense 4)
2. Computing a symbol that can represent any character or group of characters, as in a filename
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

wild card

[′wīld ‚kärd]
(computer science)
A symbolic character in a search argument such that any character will satisfy it.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

wild card

(operating system, programming, text)
(From card games in which certain cards, often the joker, can act as any other card) A special character or character sequence which matches any character in a string comparison, like ellipsis ("...") in ordinary written text.

In Unix filenames '?' matches any single character and '*' matches any zero or more characters. In regular expressions, '.' matches any one character and "[...]" matches any one of the enclosed characters.

See also Backus-Naur Form.
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

wild cards

Symbols used to represent any value when selecting specific files. In DOS, Windows and Unix, the asterisk (*) represents any collection of characters, and the question mark (?) represents a single character. In SQL, the percent sign (%) and underscore (_) are used for matching text. Note the following examples:

DOS and Windows (case insensitive)

 *.gif    .gif or .GIF extension

 a*.gif   beginning with "a" or "A"

 boot.*   all files named "BooT"
           any mix upper/lower case

 *.d*     extensions starting with
           "d" or "D"

 ?abc     1ABC, 2abc, etc.

 ??abc    10ABC, xxabc, etc.


 Windows only (case insensitive)

 *t.jpg   JPEG files ending with "T"


 Unix only (case sensitive)

 *.jpg    .jpg extension

 *.JPG    .JPG extension

 a*.jpg   beginning with "a"

 A*.jpg   beginning with "A"

 boot.*   all files named "boot"

 BOOT.*   all files named "BOOT"

 ?abc     1abc, xabc, etc.

 ??ABC    10ABC, XXABC, etc.


 SQL

 Good%    begining with "Good"

 _bcd     any name followed by "bcd"

wildcard mask

A coding system used with access control lists to identify IP addresses. A line entry in the list contains a command, an IP address and a mask that references the IP address. Although access list commands are cryptic, an English translation of a line entry might be "deny entry to packets with these addresses."

The mask is a binary pattern that contains the same number of bits as the IP address. Each 0 bit in the mask means that the corresponding bit in the IP address must match exactly. A 1 indicates that the bit does not have to match and can be ignored. For example, in order to stipulate a specific IP address, that address would be accompanied by a wildcard mask of 0.0.0.0. To refer to all packets with Class A addresses in the 10.10.x.x range, the wildcard mask would be 0.0.255.255.

The Opposite of the Subnet Mask
Whereas a 0 bit in a wildcard mask means "match the bits," a 0 in a subnet mask means "do not match." Thus, a wildcard mask of 0.0.0.255 is the equivalent of a subnet mask of 255.255.255.0. See access control list, subnet mask and IP address. See also wild cards.
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References in periodicals archive ?
Murray admitted even if he'd taken a wildcard it was more likely he would not have played given how heavy his legs felt.
The total consideration for the acquisition will be based on a three-year earnout at a maximum of seven times wildcard's profit after tax if the business achieves certain income and profit growth targets.
The move by the United States Tennis Association (USTA) comes after Sharapova, ranked 148th this week, was rejected for a wildcard spot into the French Open and missed Wimbledon with a thigh injury.
"A wildcard is being held in reserve for Murray, who will let tournament director Stephen Farrow know nearer the time of the event if he is fit enough to take it," said a statement from Queen's.
Since the *apple* wildcard worked so well with VLOOKUP, I created a data set where we could test to see if SUMIFS would allow wildcards as well.
We have a scheduled meeting on June 18 ahead of the championships to decide on wildcards.
Now the Demigod Squad are appealing for help to gain wildcard entry to the competition and are hoping to wow the judges with their hip hop moves.
"I am happy also because we gave Malek the wildcard again this year.
Twelve of the world's best and four wildcard entries took part in the tournament, which sees competitors get three minutes to hit eight balls as far as possible in four sudden death knockout rounds for the a share of the Dh94,500 (u19,000) prize pool.
"We are extremely pleased that Wildcard has joined FarGo and we look forward to watching it grow and develop."
Studio Wildcard brought an unpleasant news to fans of its Early Access dinosaur survival game, entitled "Ark: Survival Evolved." Apparently, the development of the game has encountered a setback that ultimately made the developer decide to just push back its release date by three weeks.