CONTROL
- Introduction to CTRL
- CONTROL Classes
- Types of Control Functions
  - User administration
  - Database functions
  - File functions
  - Data point functions
  - Selection and configuration dialogs
  - Vector / Dynamic arrays
  - Error functions
  - Window functions
  - Functions for bit32/bit64 variables
  - Functions for blob variables
  - Graphics functions
  - Communication functions
  - Multilingual functionality
  - Mapping functions
  - Mathematical functions
  - Multilingual functionality
  - Alert handling
  - MindSphere Connector Functions
  - Project administration functions
  - Query functions
  - Redu/Dist functions
  - Semaphore Functions
  - String functions
    - "at" (string::at)
      Returns the character at the given index idx in the string.
    - "chop" (string::chop)
      Removes n characters from the end of the string.
    - "clear" (string::clear)
      Empties the string.
    - "contains" (string::contains)
      Returns true if this string contains an occurrence of the string s, otherwise false.
    - "count" (string::count)
      Returns the number of (potentially overlapping) occurrences of the string s in this string.
    - "indexOf" (string::indexOf)
      Returns the index position of the first occurrence of the string s in this string.
    - "insert" (string::insert)
      Inserts the string s at the given index pos.
    - "isEmpty" (string::isEmpty)
      Returns true if the string is empty.
    - "lastIndexOf" (string::lastIndexOf)
      Returns the index position of the last occurrence of the string s in this string.
    - "left" (string::left)
      Returns a substring that contains the n leftmost characters of the string.
    - "length" (string::lenght)
      Returns the number of Unicode characters.
    - "mid" (string::mid)
      Returns a string that contains n characters of this string, starting at the specified pos index.
    - "remove" (string::remove)
      Removes n characters from the string, starting at the given pos index.
    - "replace" (string::replace)
      Replaces part of a string with a new one.
    - "right" (string::right)
      Returns a substring that contains the n rightmost characters of the string.
    - "split" (string::split)
      Splits the string into substrings wherever sep occurs, and returns the list of those strings.
    - "startsWith" (string::startsWith)
      Returns true if the string starts with s, otherwise false.
    - "toLower" (string::toLower)
      Returns a lowercase copy of the string.
    - "toUpper" (string::toUpper)
      Returns an uppercase copy of the string.
    - "trim" (string::trim)
      Removes whitespace from the start and the end.
    - "trimmed" (string::trimmed)
      This function produces a trimmed, new instance of a string.
  - Threads
  - Vector / Dynamic arrays
  - Administration of managers, modules and panels
  - Waiting Control functions
  - XML Control Extension
  - Time functions
  - Miscellaneous functions
  - Reference - Focus Policy
  - day()
    The method returns the day of the month.
- CONTROL graphics
- CONTROL Functions
- CTRL-Debugger
  Der CTRL-Debugger ermöglicht ein Debuggen der Pogrammiersprache Control.

"at" (string::at)

Returns the character at the given index idx in the string.

Synopsis

string string.at(uint idx);

Parameters


Parameter	Description
idx	Index within the string

Description

Returns the character at the given index idx in the string.

If idx >= length() an empty string is returned.

Since the string can contain Unicode characters, the return value is also a string representing a single Unicode character (e.g. UTF-8 multibyte encoded)

Assignment

String