Empty string: Difference between revisions

=={{header|Jsish}}==

<lang javascript>/* Empty string, in Jsish */

var em1 = '';

var em2 = new String();

var str = 'non-empty';

;'Empty string tests';

;em1 == '';

;em1 === '';

;em1.length == 0;

;!em1;

;(em1) ? false : true;

;Object.is(em1, '');

;Object.is(em1, new String());

;'Non empty string tests';

;str != '';

;str !== '';

;str.length != 0;

;str.length > 0;

;!!str;

;(str) ? true : false;

;'Compare two empty strings';

;(em1 == em2);

;(em1 === em2);

/*

=!EXPECTSTART!=

'Empty string tests'

em1 == '' ==> true

em1 === '' ==> true

em1.length == 0 ==> true

!em1 ==> true

(em1) ? false : true ==> true

Object.is(em1, '') ==> true

Object.is(em1, new String()) ==> true

'Non empty string tests'

str != '' ==> true

str !== '' ==> true

str.length != 0 ==> true

str.length > 0 ==> true

!!str ==> true

(str) ? true : false ==> true

'Compare two empty strings'

(em1 == em2) ==> true

(em1 === em2) ==> true

=!EXPECTEND!=

*/</lang>

{{out}}

<pre>prompt$ jsish --U emptyString.jsi

'Empty string tests'

em1 == '' ==> true

em1 === '' ==> true

em1.length == 0 ==> true

!em1 ==> true

(em1) ? false : true ==> true

Object.is(em1, '') ==> true

Object.is(em1, new String()) ==> true

'Non empty string tests'

str != '' ==> true

str !== '' ==> true

str.length != 0 ==> true

str.length > 0 ==> true

!!str ==> true

(str) ? true : false ==> true

'Compare two empty strings'

(em1 == em2) ==> true

(em1 === em2) ==> true

prompt$ jsish -u emptyString.jsi

[PASS] emptyString.jsi</pre>