c if false

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BOOL and bool True vs. false vs. False in C + + (reprinted)

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 #

Shell programming if condition judgment and if true and false judgment

If condition judgment and if True and false judgment Directory:1. Correct wording2. Wrong wording3. Summary First, the correct wordingWhen writing shell scripts, to simplify the line numbers and structure of the code, it is common to

JS in false value _es5 defined in the ToBoolean method force type conversion after the value is False

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 -

Ask a small white question: why PHP is often used! ==false true, why don't you just use ===true?

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

Zhenyang (true positive rate), false positive (false positive rate), Auc,roc

These concepts were known a long time ago, but they are often forgotten because they are not the same as their cognitive habits. So simply to summarize these concepts, and then forget to look for (other articles too verbose, computational methods

Ask a question: why php is often used! = False indicates true. Why not use = true directly?

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

PHP array comparison function, returns true if there is an intersection, otherwise returns false _ PHP Tutorial

PHP array comparison function. If an intersection exists, true is returned. otherwise, false is returned. Copy the code as follows :? Php $ array1array (a, B, c, d); $ array2array (a, c); $ array3array_intersect ($ array1, $ array2); if ($ array3)

The difference between null,0,,false in PHP updatedata false javascript:false Async Fals

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

ASP. NET true/false paging-true paging, asp.net true/false Paging

ASP. NET true/false paging-true paging, asp.net true/false Paging When the data volume is too large and there are tens of thousands or even tens of thousands of pieces of data, every time you retrieve all the data from the database, the query

True in Python python, false condition judgment

Programmers with programming experience know the wording of conditional statements:Take C + + as an example:if (condition) { dosomething ();}The syntax for conditional judgments in Python is as follows:if (condition): dosomething ()So when is

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