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Bin - Convert from decimal to binary
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| Total Hit (2700) |
«Code LangId=1»' convert from decimal to binary
' if you pass the Digits argument, the result is truncated
' to that number of digits
'
Function Bin(ByVal value As Long, Optional digits As Long = -1) As String
Dim result As String, exponent As Integer
' this is faster than creating t
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BinToDec - Convert from binary to decimal
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| Total Hit (4018) |
«Code LangId=1»' convert from binary to decimal
'
Function BinToDec(value As String) As Long
Dim result As Long, i As Integer, exponent As Integer
For i = Len(value) To 1 Step -1
Select Case Asc(Mid$(value, i, 1))
Case 48 ' "0", do nothing
Case 4
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BitClear - Clear a bit in a value
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| Total Hit (2634) |
«Code LangId=1»Function BitClear(ByVal value As Long, ByVal bit As Long) As Long
' simply AND with the negation of the bit mask
' Range checking is performed in Power2()
BitClear = (value And Not Power2(bit))
End Function
' Raise 2 to a power
' the exponent must be in the range [
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BitCount - The number of "1" bits in a number
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| Total Hit (2627) |
«Code LangId=1»
' The number of 1's in a binary number
'
' This routine is based on the following property
' of binary numbers: n And (n-1) always clears the
' least significant "1" bit in the number
Function BitCount (ByVal number As Long) As Integer
Do While number
number =
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BitSet - Set a bit in a number
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| Total Hit (2805) |
«Code LangId=1»' Set a bit in a value
'
' NOTE: requires Power2()
Function BitSet(ByVal value As Long, ByVal bit As Long) As Long
' simply OR with the bit mask
' Range checking is performed in Power2()
BitSet = (value Or Power2(bit))
End Function
' Raise 2 to a power
' the e
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BitTest - Test the value of a bit
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| Total Hit (3501) |
«Code LangId=1»' Test the value of a bit
'
' NOTE: requires Power2()
Function BitTest(ByVal value As Long, ByVal bit As Long) As Boolean
' simply AND with the bit mask
' Range checking is performed in Power2()
BitTest = (value And Power2(bit))
End Function
' Raise 2 to a po
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BitToggle - Invert a bit in a value
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| Total Hit (2873) |
«Code LangId=1»' Toggle a bit in a value
'
' NOTE: requires Power2()
Function BitToggle(ByVal value As Long, ByVal bit As Long) As Long
' simply XOR with the negation of the bit mask
' Range checking is performed in Power2()
BitToggle = (value Xor Power2(bit))
End Function
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CComplexNumber - A class for dealing with complex numbers
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| Total Hit (2673) |
«Code LangId=1»Option Explicit
'------------------------------------------
' A class for dealing with complex numbers
'------------------------------------------
' The main properties
Public Real As Double
Public Imaginary As Double
' Initialize this complex number
' (returns Me)
Fu
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Cot, Sec, Csc - Missing trig functions
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| Total Hit (3464) |
«Code LangId=1»' Cotangent of an angle
Function Cot(radians As Double) As Double
Cot = 1 / Tan(radians)
End Function
' Secant of an angle
Function Sec(radians As Double) As Double
Sec = 1 / Cos(radians)
End Function
' cosecant of an angle
Function Csc(radians As Double) As
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Crc16 - Evaluate the 16-bit CRC of an array of bytes
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| Total Hit (4463) |
«Code LangId=1»Option Explicit
' Evalutate the 16-bit CRC (Cyclic Redundancy Checksum) of an array of bytes
'
' If you omit the second argument, the entire array is considered
Function Crc16(cp() As Byte, Optional ByVal Size As Long = -1) As Long
Dim i As Long
Dim fcs As Long
Static
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Dec2Any - Convert a decimal number to any other base
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| Total Hit (3161) |
«Code LangId=1»' convert a number to any base
' BASE can be in the range 2-36
Function Dec2Any(ByVal number As Long, ByVal base As Integer) As String
Dim index As Long
Dim digits As String
Dim digitValue As Long
' check base
If base < 2 Or base > 36 Then Err.Raise
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DecToFrac - Converts a decimal number into a fraction
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| Total Hit (1734) |
«Code LangId=1»' Converts a decimal value into fractional parts as integers
' (based on the concept of Continued Fractions)
' Examples of usage:
' Call DeclToFrac(0.125, a, b) ' 1 and 8 are returned in a & b
' Call DecToFrac(5/40, a, b) ' 1 and 8 are also returned
' Call DecToFrac(2/3
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Factorial - The factorial of a number
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| Total Hit (1666) |
«Code LangId=1»' The factorial of a number
'
' if NUMBER is negative or >170 it raises an
' "subscript out of range" error
Function Factorial(ByVal number As Long) As Double
Static result(170) As Double
' this routine is very fast because it
' caches all the possible resul
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Fract - The fractional portion of a number
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| Total Hit (1530) |
«Code LangId=1»' The fractional part of a floating-point number
' note that negative numbers return negative values
Function Fract(number As Variant) As Variant
Fract = number - Fix(number)
End Function
«/Code»
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GCD - The Greatest Common Divisor of two integers
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| Total Hit (1633) |
«Code LangId=1»' the Greatest Common Divisor of two integers
' (it uses the Euclide's algorithm)
' if either argument is zero you get a "Division by Zero" error
Function GCD(ByVal n1 As Long, ByVal n2 As Long) As Long
Dim tmp As Long
Do
' swap the items so that n1 >= n2
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GetPrimeNumbers - Evaluate the first N prime numbers
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| Total Hit (1578) |
«Code LangId=1»' Returns an array with the first N prime numbers
'
' Note: you can easily convert this routine to VB4 and VB5 by
' returning the result array through an argument instead of
' the return value
Function GetPrimeNumbers(numberOfPrimes As Long) As Long()
Dim found As Long
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HiWord - The most significant word in a Long value
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| Total Hit (2146) |
«Code LangId=1»
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (dest As _
Any, source As Any, ByVal bytes As Long)
' Return the high word of a Long value.
Function HiWord(ByVal value As Long) As Integer
CopyMemory HiWord, ByVal VarPtr(value) + 2, 2
End Function
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IsPrime - Determine whether a number is prime
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| Total Hit (1579) |
«Code LangId=1»
' Return True if the number is prime
Function IsPrime(ByVal number As Long) As Boolean
' manually test 2 and 3
If number > 3 Then
If number Mod 2 = 0 Then Exit Function
If number Mod 3 = 0 Then Exit Function
End If
' we can now avoid to consi
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LCM - The Least Common Multiple of two integers
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| Total Hit (3292) |
«Code LangId=1»' the Least Common Multiple of two integers
' (it uses the Euclide's algorithm)
' if either argument is zero you get a "Division by Zero" error
'
' Note: if your app also includes the CGD() function,
' you can simplify the following code as follows:
' LCM = (n1 * n2)
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Log10 - Base-10 logarithm
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| Total Hit (1646) |
«Code LangId=1»
' Base 10 logarithm
Function Log10(number As Double) As Double
Log10 = Log(number) / 2.30258509299405
End Function
«/Code»
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LowWord - The least significant word of a Long value.
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| Total Hit (2094) |
«Code LangId=1»Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (dest As _
Any, source As Any, ByVal bytes As Long)
' Return the low word of a Long value
Function LowWord(ByVal value As Long) As Integer
CopyMemory LowWord, value, 2
End Function
«/Code»
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MK? And CV? - Convert numbers to strings and back
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| Total Hit (3059) |
«Code LangId=1»
' This group of routines convert a numeric value into a string
' that contain the internal representation of the number.
' They can be useful when converting outdated QuickBasic programs,
' because that language supported these functions that were
' never ported to Visual Basic
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NormRand - Produce random numbers with normal distribution
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| Total Hit (2309) |
«Code LangId=1»' VBA's intrinsic Rnd function returns numbers evenly
' distributed between 0 and 1. Each number in that
' interval has equal probability of being returned
' for any given function call.
' This function NormRand returns a random number between
' -infinity and +infinity distib
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Power2 - A power of 2
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| Total Hit (1737) |
«Code LangId=1»
' Raise 2 to a power
' the exponent must be in the range [0,31]
Function Power2(ByVal exponent As Long) As Long
Static res(0 To 31) As Long
Dim i As Long
' rule out errors
If exponent < 0 Or exponent > 31 Then Err.Raise 5
' initialize the arr
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