Javascript Global Functions

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* <div id="isNaN">'''isNan(arg)'''</div>
 
* <div id="isNaN">'''isNan(arg)'''</div>
 
This function checks if ''arg'' is a number or not.
 
This function checks if ''arg'' is a number or not.
 +
 +
Returns true if ''arg'' is not a number, false if it's a valid number.
  
 
* <div id="parseInt">'''parseInt(str)'''</div>
 
* <div id="parseInt">'''parseInt(str)'''</div>
Converts a string ''str'' to a number using a default numbering base
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Converts a string ''str'' to a number using the default numbering base 10.
  
 
Obeys usual programming conventions:
 
Obeys usual programming conventions:
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* All other strings are assumed decimal
 
* All other strings are assumed decimal
  
Returns number or zero if ''str'' was not parsable.
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Returns a number or zero if ''str'' was not parsable.
  
 
* <div id="parseInt">'''parseInt(str,base)'''</div>
 
* <div id="parseInt">'''parseInt(str,base)'''</div>
Converts a string ''str'' to a number using a specific numbering ''base''
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Converts a string ''str'' to a number using a specific numbering ''base''.
  
 
Base must be between 2 and 36.
 
Base must be between 2 and 36.
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 +
Returns a number or zero if ''str'' was not parsable in numbering ''base''.

Revision as of 16:56, 10 September 2013

These functions exist in the global context and can be called from anywhere.

  • isNan(arg)

This function checks if arg is a number or not.

Returns true if arg is not a number, false if it's a valid number.

  • parseInt(str)

Converts a string str to a number using the default numbering base 10.

Obeys usual programming conventions:

  • Strings starting with 0x are hexadecimal
  • Strings starting with 0 are octal
  • All other strings are assumed decimal

Returns a number or zero if str was not parsable.

  • parseInt(str,base)

Converts a string str to a number using a specific numbering base.

Base must be between 2 and 36.

Returns a number or zero if str was not parsable in numbering base.

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