tenenbaum true value

MFC VC + + in the database to query the table to determine whether the SQL statement execution successIf there is a return bool value of TRUE (1), if the failure returns a bool value of FALSE (0).The simple bool type code is as follows:CString Sql,result;sql. Format (_t ("select * FROM [dbo].[ %s] "), name);//Name is the name of the table in the database that yo

in PHP$a = ' 0 ';$b = (bool) $a;Var_dump ($a);//Output FalseIn JS, the official description:Note:if The value parameter is omitted, or was 0, 0, NULL,, False, undefined, or NaN, the object is set to False.Otherwise It is set to true (even with the string false)!Test: value is true.PHP face TestOriginal: Reprint to http://www.thinkphp.cn/topic/30726.htmlString 0.

About a in Java! = The A value is interpreted as true. In Java spec, the primitive type is implemented in a certain defined way. The Floating-types are implemented in IEEE-754 standard.Ref from Java SPEC: The IEEE 754 standard instances des not only positive and negative sign-magn1_numbers, but also positive and negative zeros, positive and negative Infinities , And a special Not-a-number

Question from:A property _tag= "false" is set on a page element;JS gets the attribute, and makes a judgment like this: $ ('. XX '). attr (' _tag ') = = ' false ';Then the problem arises:The property type obtained under IE7, IE8 is Boolean, and IE9 is string.So the judgment error.Recommendation, 1. The determination of a similar attribute value avoids the setting of the Boolean type, which is false and true;

The two objects have the same value (x. equals (y) = true), but different hash codes are available, right ?, X. mongoshash1. Online interview questions this is a Java interview question. If you have read a lot of answers and say no, you can read the following code and you will know the result: http://www.iteye.com/topic/485046. the answer to Question 45 is wrong. Package com. test; public class Main {publi

Symptom: When the attribute of the actievx control is variant_bool, the return value of get is always true on the client. Cause: the MFC is converted during the transfer process, but the variant_boo is short type. The MFC is indeed converted to DWORD, so the conversion is always true. (For details, see the 1100 rows in oledisp1.cpp under vc2003 ). Method: Set the

Method One : Do not set the ReadOnly property, which is simulated by Onfocus=this.blur (), as follows:In this case, when the text box gets the focus immediately lost, so also can not manually modify its contents, can simulate ReadOnly, in the background code can also through the Text property, normal to get through the script in the client set value; Method Two : After setting the ReadOnly property, use request to fetch the

A bool value from a configuration file, network, or other means, when assigned to bool, the discovery of true is not necessarily 1 There may be other errors causing this value to be wrong. Although it does not affect logic, it still shows that there are errors in other areas of logic. To make a judgment, do not let values other than 0 and 1 enter bool, Otherwi

Development encountered a problem, when running the project, there is a problem such as the followingIssue: Manifest merger Failed:attribute [email protected] value= (true) workaroundWorkaround:Add xmlns:tools= to Androidmanifest.xml "Http://schemas.android.com/toolsPackage= "xxx" xmlns:android= "http://schemas.android.com/ Apk/res/android " xmlns:tools=" Http://schemas.android.com/tools "

Problem Description:In the HTML page to get a background pass through the time and displayed on the page, I use getFullYear (), GetMonth (), getDate () respectively obtained the date on the computer and Samsung mobile Phone page can display the correct time, And the Apple phone does show NaN.NaN.NaN.Workaround:For compatibility issues, you need to change the middle line to a slash.newDate("2017-02-16 20:41:10".replace(/-/g,‘/‘)).getFullYear()About Apple True