false comparison

At work we are constantly writing code, writing JavaScript, very little time for conceptual research. I have nothing to do today, I studied the relationship between "null" and "0". I hope you have seen the end of the harvest. Alert (null>=0) What

Document directory Clause 21: always let the comparison function return false for equal values  Clause 21: always let the comparison function return false for equal values Let me show you something cool. Create a set, use less_equal for the

ArticleDirectory Clause 21: always let the comparison function return false for equal values Clause 21: always let the comparison function return false for equal values Let me show you something cool. Create a set, use less_equal for

AspNetPager is an instance of comparison between true and false pages, and aspnetpager is a real and false page. It has been a while since learning BS. BS is designed for Web pages, including the data retrieved from the database and displayed on the

There is a basic concept in JS:JavaScript in Undefined==nullBut Undefined!==nullUndefined and Null are converted to Boolean values are falseIf you follow a general idea, such as the following codevar a=1; alert (Boolean (a)); // returns True // then

Think of a fun, run the following javascript:if (' 0 ') alert ("' 0 ' is true");if (' 0 ' = = False) alert ("' 0 ' is false"); As a result, two alert! So is ' 0 ' true or false?The answer is: When you compare JS, there are three rules:If there is a

1. Value of Ture or FalseThe value of the Boolean type that will be implicitly converted to false in the If judgment has false, 0, undefined, null, ' ', NaN (not a number)Besides the other values will be considered true, including ' 0 ', ' false ',

. For fun, run the following javascript:If ('0') Alert ("'0' is true ");If ('0' = false) Alert ("'0' is false"); the result is that alert is used twice! So is '0' true or false? The answer is: when comparing JavaScript, there are three rules: If

AspNetPager comparison of true and false pages It has been a while since learning BS. BS is designed for Web pages, including the data retrieved from the database and displayed on the page. Previously, in CS, table controls such as GridView were

Judge "" = "" actually return false, the previous double quotation marks are taken from the database processing data to get to, after a double quotation mark is used to knock out the editor, the result of the comparison is false, is the problem of