Regular Expressions 101

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Regular Expression
PCRE2 (PHP >=7.3)

^(?<numberExpression>(?<numberDice>[0-9]+)(?<gaussExpression>[oO]?(?<gaussDices>[0-9])+(?<gaussModifier>[\+\-])?)?)?[dD](?<faces>[0-9]+)(?<exploding>[¡!]{0,2})(?<modifierExpression>[\+\-](?<modifierValue>[0-9]+))?(?<thresholdExp>:(?<thresholdValue>[0-9]+))?

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Description

You can express the required dice-throwing as usual: 1d10, 2d6, 3d8...
The first part (dice number) is mandatory. So, notations like "D10" are not computed, and they must be written as 1d10
The dice number may be expressed as [number]o[number]. For example: 1o3d10. That will mark to implement a Gauss system, throwing 3 dice but only giving the value of the middle one.
If that's the case, it is possible to add a symbol + or - at the end of the dice number value, to mark if whether you want the lowest or the highest value instead.
The second part of the dice (the number of sides) may be any integer
You can add a ! or a ¡ (or both) at the end of the notated dice to represent exploding and imploding dices
In addition, you can express a modifier in the form of a subtraction (-3, for example) or an addition (+2, for example)
You can finally add a threshold (:20, for example).

Submitted by Hermes - 2 years ago (Last modified 2 years ago)

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Community Library Entry

Regular ExpressionPCRE2 (PHP >=7.3)

Description

Regular Expression
PCRE2 (PHP >=7.3)