I saw somewhere this code snippet: var idx = SOME_VALUE; var color = { yellor: 1, red: 2, black: 0 }; var x = color[idx] || []; // Is 开发者_运维百科this means if color[idx] is null, then return an
In JavaScript (f1() || f2()) won\'t execute f2 if f1 returns true which is usually a good thing except for when it isn\'t. Is there a version of || that doesn\'t short circuit?
Why does if (isset($_SESSION[\'location\']) AND !empty($_SESSION[\'location\'])) work while if (isset($_SESSION[\'location\']) && !empty($_SESSION[\'location\']))
Why do these logical operators return an object and not a boolean? var _ = (obj.fn && obj.fn() ) || obj._ || ( obj._ = {} );
this is what i have: <?php if($row[\'id\']!=\"9\") echo \"style=\\\"display:none\\\"\"; ?> simple enough, it should place style=\"dsplay:none\" when \'i开发者_运维问答d\' is anything but 9. t
I have a quick question about using logical operators in an if statement. Currently I have an if statement that checks if x equals to 5 or 4 or 78:
One of the things I like the most of JavaScript is that the logical operators are very powerful: && can be used to safely extract the value of an object\'s 开发者_StackOverflowfield, and wil
Is it a bad idea to overload &&, || or comma operator and Wh开发者_开发百科y?I wouldn\'t overload operator&& or operator||. Even if you define a class that gives rise to a Boolean alge
I think my point is clear, under any condition, could this throw null-reference exception? i.e. objecting that e.Result is null while trying to access its Count property.
if(!($whatever && what()) do_stuff... Can this be replaced with something more intuitive like:
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