Change Password

Please enter the password.
Please enter the password. Between 8-64 characters. Not identical to your email address. Contain at least 3 of uppercase, lowercase, numbers, and special characters (such as @*&#).
Please enter the password.
Submit

Change Nickname

Current Nickname:
Submit

Certifications

Certificate Issued at Valid until Serial No. File
Serial No. Valid until File

Not having one? Apply now! >>>

Invoice

ProductName CreateTime ID Price File
ProductName CreateTime ID Price File
v4.2
Search
    中文EN
    v4.2

      Not

      ! calculates the opposite value of an expression as in:

      expression Result
      0 1
      1 0
      • Expression: !<exp>
      • Operand: expression (true, false)

      Common Usage

      Example: find 10 cards whose balances are 0

      find().nodes({@card && !balance}) as n
      limit 10
      return n{*}
      

      Analysis: the filter can not be put into {!@card.balance}, as the result would be returned as {!@card || !balance}'s otherwise.

      Please complete the following information to download this book
      *
      公司名称不能为空
      *
      公司邮箱必须填写
      *
      你的名字必须填写
      *
      你的电话必须填写
      *
      你的电话必须填写