STRING::ISSPACE 1g 2024-04-11 laplante@plcb.ca GOWEB/STRING — Check for Whitespace Characters

title: “STRING::ISSPACE” version: “1.0.0” date: 2024-04-11 author: “laplante@plcb.ca” section: “1g”

category: “GOWEB/STRING”

Name

string::isspace Check for Whitespace Characters

Synopsis

string::isspace(string[, error: variable, string...])
isspace(string[, error: variable, string...])

Description

The isspace function checks whether the provided string contains only whitespace characters.

According to the Unicode standard, the following characters are considered whitespace:

• ASCII space (U+0020)
• Horizontal Tab (U+0009)
• Line Feed (U+000A)
• Vertical Tab (U+000B)
• Form Feed (U+000C)
• Carriage Return (U+000D)
• Next Line (U+0085)
• No-Break Space (U+00A0)
• Ogham Space Mark (U+1680)
• En Quad (U+2000)
• Em Quad (U+2001)
• En Space (U+2002)
• Em Space (U+2003)
• Three-Per-Em Space (U+2004)
• Four-Per-Em Space (U+2005)
• Six-Per-Em Space (U+2006)
• Figure Space (U+2007)
• Punctuation Space (U+2008)
• Thin Space (U+2009)
• Hair Space (U+200A)
• Line Separator (U+2028)
• Paragraph Separator (U+2029)
• Narrow No-Break Space (U+202F)
• Medium Mathematical Space (U+205F)
• Ideographic Space (U+3000)

Examples

res={{
    isspace("   "); "\n";
    isspace("\n"); "\n";
    isspace("123"); "\n";
    isblank("   "); "\n";
    isblank("\n"); "\n";
    isblank("123"); "\n";
    isblank("		"); "\n";
    isblank("		"); "\n";
    isblank("		
				"); "\n";
    isblank("		
				"); "\n";
    isblank("		_"); "\n";
    isblank("		_"); "\n";
}}.

Returns:

res=true
true
false
true
false
false
true
true
false
false
false
false

Author

laplante@plcb.ca

See Also

• string::isblank
  
• String functions
  
• Index
  

Version

• 1.0.0 — 2024-04-11 — Initial version