VBS string and date operation functions

1. Asc (x), Chr (x): conversion character, escape code
2. Filter: Search for a specific string in the string array
Format: v = filter (x, s [, include [, compare])
Instance:
Dim x () = {"kjwang", "wangkj", "peter "}
Dim v
V = filter (x, "kj") 'result v (0) = "kjwang", v (1) = "wangkj"
V = filter (x, "kj", false) 'result v (0) = "peter"
V = filter (x, "kj", true, vbTextCompare) 'case-insensitive search
3. InStr: search for the string position (reverse Rev: Search for the string)
Format:
V = instr (x, y) 'returns the position where the y string appears starting from 1st characters in string x.
V = instr (n, x, y) 'specifies the position where the y string appears from the nth character of string x.
Format:
V = Limit Rev (x, s [, n [, Compare])
4. Join: connect strings
Format: v = join (x [, d]) 'd is a separator
5. Len (x): calculates the length of string x.
Format: v = len (x)
6. Left (x, n): returns n characters (corresponding to Right (x, n) on the Left of string x ))
7. Mid: read characters in the middle of string x
Format: v = mid (x, n, m)
8. LTrim (x), RTim (x), Trim (x) Go to blank characters
9. Replace: String replacement
Format: v = Replace (x, s, r)
Instance: x = "I saw a saw"
V = replace (x, "saw", "so") 'v = "I so a so"
10. Split: string segmentation
Format: v = split (s [, d])
Instance: v = split ("vb.net, iis6.0, asp.net ",",")
'Result v (0) = "vb.net", v (1) = "iis6.0", v (2) = "asp.net"
11. StrReverse: reverse string
Instance: v = strreverse ("kjwang") 'v = "gnawjk"
12. UCase (x) and LCase (x): Change the case sensitivity of English letters.
Example: x = "hello, VB Chinese! "
V = UCase (x) 'v = "HELLO, VB Chinese! "
'Date-related:
1. Retrieve the date and time
1) DateValue (x), TimeValue (x)
Format: v = DateValue (x): The retrieved "date" section.
V = timevalue (x) 'class
2) Year (x), Month (x), Day (x)
Format: v = Year (x)
V = Month (x)
V = Day (x)
Hour (x), Minute (x), Second (x): Minute, Second
3) DateSerial (Y, M, D): combines the year, month, and day as the date
Instance: Dim v
V = DateSerial (, 5) 'v = 1996/10/5
TimeSerial (H, M, S): the merging time, minute, and second
2. Now: reads the system date and time
Format: v = now
3. Timer: the number of seconds that have elapsed since 12:00:00 AM.
Format: v = timer
4. DatePart (p, x): obtains the values of the year, month, day, and other parts.
Instance: Dim X = #2/10/1996 16:45:30 #
V = DatePart ("yyyy", X) 'v = 1996
V = DatePart ("m", X) 'v = February
V = DatePart ("d", X) 'v = 10
V = DatePart ("h", X) 'v = 16 hours
V = DatePart ("n", X) 'v = 45
V = DatePart ("s", X) 'v = 30 seconds
V = DatePart ("q", X) 'v = Season 1 (first season, spring)
V = DatePart ("y", X) 'v = 41 days (1996 days of January 1, 41st)
V = DatePart ("ww", X) 'v = 6 weeks (1996 weeks of 6th)
V = DatePart ("w", X) 'v = 7 (6th days of week 1, that is, Saturday)
5. DateAdd (p, n, x): the new date and time after the plus or minus time
Format: v = DateAdd (p, n, x) 'P value is the same as above: "yyyy", "m", etc.
Instance: Dim x = #1/31/1996 16:45:30 #
V = dateadd ("yyyy",-3, x) 'minus 3 years, v = 16:45:30
6. DateDiff (p, x1, x2): calculate the difference between the two Date and time. The p value is the same as above.
Instance: dim x1 = #12/31/1996 16:45:30 #
X2 = #2/10/1997 9:30:50 #
V = datediff ("yyyy", x1, x2) 'v = 1 year
7. FormatDateTime: format the date and time
Format: v = formatdateyime (x [, Date Format])
Date Format values: DateFormat. GeneralDate, DateFormat. LongDate,
DateFotmat. interval date, DateFormat. LongTime, DateFormat. interval time
8. MonthName: returns the name of the month.
Instance: v = monthname (5) 'v = "May"
9. WeekDayName: the name of the returned Week.