false language

Http://blog.chinaunix.net/uid-28458801-id-3941112.htmlThe difference between false/true and False/true 1. The difference between false/true and false/true: False/true is a new keyword in the standard C + + language, and False/true is through #

JavaScript you don't Know (middle)--ToBooleanThe values in JavaScript can be divided into the following two categories:1. A value that can be coerced into a type that is False2. Other (values that are cast to true for the coercion type)false Values -

In PHP because it is a weakly typed language, the different types of values can be implicitly converted, making false,null, ", 0, ' 0′ The comparison of these values is somewhat confusing, now summarizes:Equal judgment' = = NULL = = 0 = = False

For example, the following code: $str4="php-class,mysql-class,div-css,0,dreamweaver";$s=strtok($str4,',');while($s!==false){ echo $s.""; $s=strtok(',');} while ($s ===true) {} Why can't it be displayed?True where to use it ~ ~Beginners Please

Recall (recall rate); Precision (accuracy rate); F1-meature (Comprehensive evaluation index); These parameters are often used in information retrieval (such as search engines), natural language processing, and detection classifications.Precision:

For example, the following code: {code...} while ($ strue) {} cannot be displayed? Where can I use true ~~ For beginners, please take care of O (∩ _ ∩) O ~ Happy New Year ~ My own understanding is :! If 'false' is true, 1. The value is not equal to 2

The empty () function is used to determine whether a string is empty As long as the variable is 0,null, ", False,empty () is judged to be true. $num 1= '; $num 2=0; echo $num 1== $num 2; Echo ''; echo $num 1=== $num 2? ' 1 ': ' 0

Why does "true" output 1, but "false" output nothing? & Lt ;? Php $ a = true; echo & nbsp; "output below & nbsp; true & nbsp; & lt; br & gt;"; echo & nbsp; $ a; echo & nbsp; '& lt; br & gt;'; $ a = false: Why does true output 1, but false does not

For web development or graphic design, you may often need to use some text or pictures to fill a blank area at work, to make it look closer to completion, and to help others understand your ideas. Today, we introduce 12 web sites that can generate

Why does "true" output 1, but "false" output nothing? & Lt ;? Php $ atrue; echo & nbsp; output below & nbsp; true & nbsp; & lt; br & gt; echo & nbsp; $ a; echo & nbsp; & lt; br & gt; $ afalse; echo & nbsp; below output & nbsp; false & nb why true