validateParams.js
function(value, options){
        if(!validate.isObject(options)) options = {};
        
        // deal with undefined
        if(options.ignoreUndefined && typeof value === 'undefined'){
            return undefined;
        }
        
        // cast to boolean as appropriate
        if(options.nativeTruthinessOnly){
            return Boolean(value);
        }
        return Boolean(value) && !validate.isEmpty(value) ? true : false;
    }
function(value, options){
        if(!validate.isObject(options)) options = {};
        
        // deal with undefined
        if(options.ignoreUndefined && typeof value === 'undefined'){
            return undefined;
        }
        
        // cast to boolean as appropriate
        if(options.nativeTruthinessOnly){
            return Boolean(value);
        }
        return Boolean(value) && !validate.isEmpty(value) ? true : false;
    }
function ( value , options ) { if ( ! validate . isObject ( options ) ) options = { } ; // deal with undefined if ( options . ignoreUndefined && typeof value === 'undefined' ) { return undefined ; } // cast to boolean as appropriate if ( options . nativeTruthinessOnly ) { return Boolean ( value ) ; } return Boolean ( value ) && ! validate . isEmpty ( value ) ? true : false ; }
A coercion for converting any arbitrary value to a boolean.

By default, and value that is either natively falsey, like `0`, or that's
considered empty by the [validate.isEmpty()]{@link external:isEmpty}
function from validate.js will be coerced to `false`. Setting the
coersion option `nativeTruthinessOnly` to a truthy value will cause the
coercion to use only JavaScript's native casting to boolean.

By default `undefined` is coerced to `false`, but this behaviour can be
suppressed by setting the coercion option `ignoreUndefined` to a truthy
value. Doing so will result in `undefined` being passed through the
coercion un-altered. Note that setting both `nativeTruthiness=true` and
`ignoreUndefined` will still result in `undefined` being passed
unaltered.

@member
@type {CoercionCallback}
A coercion for converting any arbitrary value to a boolean .