Javascript Global Functions
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(Difference between revisions)
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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 | + | Converts a string ''str'' to a number using the default numbering base 10. |
Obeys usual programming conventions: | Obeys usual programming conventions: | ||
| Line 12: | Line 14: | ||
* All other strings are assumed decimal | * All other strings are assumed decimal | ||
| − | Returns number or zero if ''str'' was not parsable. | + | 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'' | + | 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. | ||
| + | |||
| + | 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.
