string isempty

The two parameters that we often use in ASP are IsNull and IsEmpty, which we use when we judge that a string is empty. For example, a string is str1, often we use the If IsNull (str1) or IsEmpty (STR1) then to determine whether the string is null by

Description: Set Aa=server.createobject ("DDD") ISNULL description pointer is null, pointer to an invalid position, that is, the object does not exist, IsEmpty Note the pointer points to a valid location, but the value is null 1, empty string

First, IsEmpty grammar Returns a Boolean value that indicates whether the variable has been initialized. Grammar IsEmpty (expression) The necessary expression parameter is a Variant that contains a numeric or string expression. However, because

The operation object of the stringutils method is Java. lang. string-type objects are complementary to the string-type operation method provided by JDK, and are null safe (that is, if the input parameter string is null, nullpointerexception is not

Sometimes we are very entangled, what is the difference between isNull, IsEmpty and the "empty string"? IsNull () A Null value indicates that the variable does not contain valid data. Null differs from Empty, which indicates that the variable was

Difference between isEmpty and null and ""; Difference between isemptynull Some time ago I read other people's code and found that sometimes I use isEmpty, sometimes I use null, and sometimes I use "". I am confused about the differences between the

The operation object of the stringutils method is Java. lang. string-type objects are complementary to the string-type operation method provided by JDK, and are null safe (that is, if the input parameter string is null, nullpointerexception is not

Difference of 1. IsNull () Null value indicates that the variable does not contain valid data. Null differs from Empty, which indicates that the variable was uninitialized. Null is also different from a 0-length string (""), and a 0-length string

Remotepath! = NULL and! Differences between textutils. isempty (remotepath) ! Textutils. isempty (remotepath) and remotepath! = NULL & remotepath. length> 0 Or initialize remotepath = NULL. In this case, only the remotepath is determined! =

I believe many Java programmers when writing code when it is necessary to determine whether a string is empty when the StringUtils class will use the Isblank and IsEmpty methods, what is the difference between the two methods? Let's use a piece of