TrimLeft and TrimRight (String functions): Difference between revisions

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{{Template:String:TrimLeft and TrimRight subtitle}}
{{Template:String:TrimLeft and TrimRight subtitle}}
These methods remove a specified number of bytes from the left or right end of a string.
These methods remove a specified number of bytes from the left or right end of a string.
==Syntax==
==Syntax==
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===Syntax terms===
===Syntax terms===
<table class="syntaxTable">
<table class="syntaxTable">
<tr><th>%outString</th><td>outString</td></tr>
<tr><th>%outString</th><td>Is the string that results from removing <var class="term">amount</var> bytes from the left or right of the method string object.</td></tr>
<tr><th>string</th>
<tr><th>string</th>
<td>String object</td></tr>
<td>The method string object from which bytes are removed.</td></tr>
<tr><th>amount</th>
<tr><th>amount</th>
<td>Number object</td></tr>
<td>The number of bytes to remove from the left or right of the indicated string.</td></tr>
</table>
</table>
==Usage notes==
==Usage notes==
<ul>
<li>An <var class="term">amount</var> of 0 results in the output string being set equal to the method string object.
<li>A negative <var class="term">amount</var> or an <var class="term">amount</var> greater than 2<sup>31</sup> results in request cancellation.
<li>An <var class="term">amount</var> greater than or equal to the length of the method string object results in the output string being set to a null string.
<li><var>TrimLeft</var> accomplishes the same thing as <var>[[Substring (String function)|SubString]]</var> when used with just the starting position and without a length. While it might be a little bit more efficient than <var>SubString</var>, it's mainly available for completeness.
<li><var>TrimRight</var> functionality can be achieved by using the <var>[[Left (String function)|Left]]</var> and <var>[[length (String function)|Length]]</var> functions but it is considerably more efficient and convenient.
</ul>
==Examples==
==Examples==
The following
<p class="code">begin
%ls  is longstring
%ls = 'Life is good':trimRight(1)
printtext {~} = '{%ls}'
%ls = 'Life is good':trimLeft(3)
printtext {~} = '{%ls}'
end
</p>
outputs
<p class="output">%ls = 'Life is goo'
%ls = 'e is good'
</p>
==See also==
==See also==
{{Template:String:TrimLeft footer}}
{{Template:String:TrimLeft footer}}

Revision as of 13:19, 5 February 2011

Trim bytes from left or right of string (String class)

[Introduced in Sirius Mods 7.9]


These methods remove a specified number of bytes from the left or right end of a string.

Syntax

%outString = string:TrimLeft( amount)

%outString = string:TrimRight( amount)

Syntax terms

%outStringIs the string that results from removing amount bytes from the left or right of the method string object.
string The method string object from which bytes are removed.
amount The number of bytes to remove from the left or right of the indicated string.

Usage notes

  • An amount of 0 results in the output string being set equal to the method string object.
  • A negative amount or an amount greater than 231 results in request cancellation.
  • An amount greater than or equal to the length of the method string object results in the output string being set to a null string.
  • TrimLeft accomplishes the same thing as SubString when used with just the starting position and without a length. While it might be a little bit more efficient than SubString, it's mainly available for completeness.
  • TrimRight functionality can be achieved by using the Left and Length functions but it is considerably more efficient and convenient.

Examples

The following

begin %ls is longstring %ls = 'Life is good':trimRight(1) printtext {~} = '{%ls}' %ls = 'Life is good':trimLeft(3) printtext {~} = '{%ls}' end

outputs

%ls = 'Life is goo' %ls = 'e is good'

See also