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Packages.md

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Packages

Mastersign.Expressions comes with a number of packages for standard applications. A package contains constants and functions.

A package can be loaded by calling EvaluationContext.Load...Package(). Calling EvaluationContext.LoadAllPackages() loads all packages that are currently included in Mastersign.Expressions.

Logic

  • not(value) - Inverts a logical value. not(true) is false and not(false) is true

Math

Constants

  • pi - The natural constant π as 64 bit floating point number
  • e - The natural constant e or Euler number as 64 bit floating point number

Functions

  • mod(num, den) - The residue or modulo of the division between num and den

  • abs(value) - The absolute value of a number (System.Math.Abs())

  • sign(value) - Returns a 32 bit integer value, representing the sign of the number (System.Math.Sign())

  • floor(value) - Rounds a number downwards (System.Math.Floor())

  • round(value) - Rounds a number (System.Math.Round())

  • ceil(calue) - Rounds a number upwards (System.Math.Ceiling())

  • trunc(value) - Truncates the fraction of a value (System.Math.Truncate())

  • sin(value) - Computes the sine of an angle (System.Math.Sin())

  • cos(value) - Computes the cosine of an angle (System.Math.Cos())

  • tan(value) - Computes the tangent of an angle (System.Math.Tan())

  • asin(value) - Computes the angle, which sine is the given number (System.Math.Asin())

  • acos(value) - Computes the angle, which cosine is the given number (System.Math.Acos())

  • atan(value) - Computes the angle, which tangent is the given number (System.Math.Atan())

  • atan2(y, x) - Computes the angle, which tangent is the ratio of the given numbers (System.Math.Atan2())

  • sinh(value) - Computes the hyperbolic sine of an angle (System.Math.Sinh())

  • cosh(value) - Computes the hyperbolic cosine of an angle (System.Math.Cosh())

  • tanh(value) - Computes the hyperbolic tangent of an angle (System.Math.Tanh())

  • sqrt(value) - Computes the square root of the given number (System.Math.Sqrt())

  • exp(value) - Computes the given number to the power of e (Euler number) (System.Math.Exp())

  • log(value) - Computes the natural logarithm of the given number (System.Math.Log())

  • log(base, exp) - Computes the logarithm of exp to the base of base (System.Math.Log())

  • log10(value) - Computes the logarithm of the given value to the base of 10 (System.Math.Log10())

  • min(a, b) - Returns the lesser value of a and b (System.Math.Min())

  • max(a,b) - Returns the greater value of a and b (System.Math.Max())

  • rand() - Returns a random number between 0.0 and 1.0 as 64 bit floating point (System.Random.NextDouble())

Conversion

All conversion functions start with the prefix c_ followed by a name describing the target type.

  • c_byte(value) - Converts a numerical value into System.Byte
  • c_sbyte(value) - Converts a numerical value into System.SByte
  • c_int16(value) - Converts a numerical value into System.Int16
  • c_uint16(value) - Converts a numerical value into System.UInt16
  • c_int32(value) - Converts a numerical value into System.Int32
  • c_uint32(value) - Converts a numerical value into System.UInt32
  • c_int64(value) - Converts a numerical value into System.Int64
  • c_uint64(value) - Converts a numerical value into System.UInt64
  • c_single(value) - Converts a numerical value into System.Single
  • c_double(value) - Converts a numerical value into System.Double
  • c_decimal(value) - Converts a numerical value into System.Decimal
  • c_str(value) - Converts an arbitrary value into a System.String by calling System.Object.ToString()

String Manipulation

  • len(value) - Returns the length of a string

  • to_lower(value) - Converts the casing of a string into lower case (System.String.ToLowerInvariant())

  • to_upper(value) - Converts the casing of a string into upper case (System.String.ToUpperInvariant())

  • trim(value) - Removes leading and trailing whitespaces from a string (System.String.Trim())

  • trim_start(value) - Removes leading white spaces from a string (System.String.TrimStart())

  • trim_end(value) - Removes trailing whitespaces from a string (System.String.TrimEnd())

  • substr(str, start) - Returns a rest of a string, beginning with the character at zero-based position start (System.String.Substring())

  • substr(str, start, length) - Returns a part of a string, starting with the character at zero-based position start and being length characters long (System.String.Substring())

  • left(str, count) - Returns the first count characters of the string, or the whole string, in case it is shorter then count.

  • right(str, count) - Returns the last count characters of the string, or the whole string, in case it is shorter then count.

  • remove(str, start) - Removes a trailing part from a string, starting with the character at zero-based position start (System.String.Remove())

  • remove(str, start, length) - Removes a part from a string, starting with the character at zero-based position start and being length characters long (System.String.Remove())

  • replace(str, old, new) - Replaces every occurance of new in str with old (System.String.Replace())

  • find(haystack, needle) - Searches for the first occurance of needle in haystack and returns the zero-based position of the first character of needle in haystack; if needle is not found, -1 is returned (System.String.IndexOf())

  • find(haystack, needle, start) - Searches for the first occurance of needle in haystack, beginning at start, and returns the zero-based position of the first character of needle in haystack; if needle is not found, -1 is returned (System.String.IndexOf())

  • find(haystack, needle, start, count) - Searches for the first occurance of needle in haystack, beginning at start but only for the next count characters, and returns the zero-based position of the first character of needle in haystack; if needle is not found, -1 is returned (System.String.IndexOf())

  • find_i(haystack, needle) - Like find(haystack, neddle), but case-insensitive (System.String.IndexOf())

  • find_i(haystack, needle, start) - Like find(haystack, neddle, start), but case-insensitive (System.String.IndexOf())

  • find_i(haystack, needle, start, count) - Like find(haystack, neddle, start, count), but case-insensitive (System.String.IndexOf())

  • find_last(haystack, needle) - Searches for the last occurance of needle in haystack and returns the zero-based position of the first character of needle in haystack; if needle is not found, -1 is returned (System.String.IndexOf())

  • find_last(haystack, needle, start) - Searches for the last occurance of needle in haystack, beginning at start, and returns the zero-based position of the first character of needle in haystack; if needle is not found, -1 is returned (System.String.IndexOf())

  • find_last(haystack, needle, start, count) - Searches for the last occurance of needle in haystack, beginning at start but only for the next count characters, and returns the zero-based position of the first character of needle in haystack; if needle is not found, -1 is returned (System.String.IndexOf())

  • find_last_i(haystack, needle) - Like find_last(haystack, needle), but case-insensitive (System.String.IndexOf())

  • find_last_i(haystack, needle, start) - Like find_last(haystack, needle, start), but case-insensitive (System.String.IndexOf())

  • find_last_i(haystack, needle, start, count) - Like find_last(haystack, needle, start, count), but case-insensitive (System.String.IndexOf())

  • contains(haystack, needle) - Returns true if needle is found at least once in haystack; otherwise it returns false (System.String.Contains())

  • starts_with(str, start) - Returns true if str begins with start; otherwise it returns false (System.String.StartsWith())

  • ends_with(str, end) - Returns true if str ends with end; otherwise it returns false (System.String.StartsWith())

  • min(a, b) - Returns the most less string, according to the alphabetical order

  • max(a, b) - Returns the greatest string, according to the alphabetical order

  • min_i(a, b) - Returns the most less string, according to the alphabetical order but case-insensitive

  • max_i(a, b) - Returns the greatest string, according to the alphabetical order but case-insensitive

Regular Expressions

  • regex(str, pattern) - Returns true, if regular expression pattern matches str at least once (System.Text.RegularExpressions.Regex.IsMatch())
  • regex_match(str, pattern) - Returns the first character sequence in str, matched by the regular expression pattern (System.Text.RegularExpressions.Regex.Match())
  • regex_replace(str, patttern, new) - Replaces every match of the regular expression pattern in str by new (System.Text.RegularExpressions.Regex.Replace())