variables

问题 We are using Tesseract OCR Java library called Tess4J. It works fine if run as a standalone application. It needs a variable called TESSDATA_PREFIX which contains the tessdata config and other charset related files. It also runs fine with embedded Tomcat 6 server in eclipse. I had set TESSDATA_PREFIX as an environment variable by using the launch configuration. But when I package everything into a WAR and drop it in deploy directory of tomcat, the environment variable does not seem to be

问题 I'm new to Java having programmed in Delphi and C# for some time,. My question relates to the usage of the "final" keyword on a variable that holds an instantiated class when the variable declaration and instantiation both happen within the scope of the same method. e.g. private String getDeviceID() { //get the android device id final TelephonyManager tm = (TelephonyManager)GetBaseContext().getSystemService(Context.TELEPHONY_SERVICE); final String deviceID = tm.getDeviceId(); // log debug

问题 I'm new to Java having programmed in Delphi and C# for some time,. My question relates to the usage of the "final" keyword on a variable that holds an instantiated class when the variable declaration and instantiation both happen within the scope of the same method. e.g. private String getDeviceID() { //get the android device id final TelephonyManager tm = (TelephonyManager)GetBaseContext().getSystemService(Context.TELEPHONY_SERVICE); final String deviceID = tm.getDeviceId(); // log debug

问题 My question relates to Java, but it also can be applied to C#. I was wondering why everybody recommends making the instance variables private as opposed to making them protected . Let's just think about it. Private variables are not seen by the subclass, so if I need to access or change the variables of the superclass in my subclass I am forced to use some accessor and mutators method like getMyPrivateVariable or setMyPrivateVariable . But when you extend some class and inherit its members,

问题 My objective is to print a text file line by line and append the line number at the beginning. Like so: <div id="wrapper"> <div class="line">1: asdf</div> <div class="line">2: asdfasdf</div> <div class="line">3: asdfasdfasdfasdf</div> <div class="line">4: asdf</div> </div> n is a variable in CSS responsible for an element's index within its parent and within a child selector you can perform operations on it, eg. nth-child(2n + 3 ) Is there any way to grab this variable and insert it as plain

问题 What is the difference between initializing a variable as global var or calling globals().update(var) . Thanks 回答1: When you say global var you are telling Python that var is the same var that was defined in a global context. You would use it in the following way: var=0 def f(): global var var=1 f() print(var) # 1 <---- the var outside the "def f" block is affected by calling f() Without the global statement, the var inside the "def f" block would be a local variable, and setting its value

问题 I am trying to define and initialize a MySQL variable for a query. I have the following: declare @countTotal int; SET @countTotal = select COUNT(*) from nGrams; I am using MySQL in Netbeans and it tells me I have an error. What/where is my error? How can I fix this? 回答1: MySQL has two different types of variable: local variables (which are not prefixed by @ ) are strongly typed and scoped to the stored program block in which they are declared. Note that, as documented under DECLARE Syntax:

问题 I would like to have my Python code start a Python interactive console (REPL) in the middle of running code using something like code.interact(). But the console that code.interact() starts doesn't see the variables in the current namespace. How do I do something like: mystring="hello" code.interact() ... and then in the interactive console that starts, I should be able to type mystring and get "hello". Is this possible? Do I need to set the "local" argument of code.interact() to something?

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 5 years ago . I am creating my first C# project, but I can't find a way to display an integer variable in a TextBox or Label. I am using visual C# and Visual Studio 2013. I have been using C++ for quite a while and I would intuitively use 'cout', but I have no idea where to put fe: textBox4.text = cal (where cal is variable).

问题 HI I am getting Resource#6 and Resource#7 when I print the following variables: $salty_password = sha1($row['salt'], $_POST['password']); if(isset($_POST['subSignIn']) && !empty($_POST['email']) && !empty($_POST['password'])) { $query = "SELECT `salt` FROM `cysticUsers` WHERE `Email` = '" . $_POST['email'] . "'"; $request = mysql_query($query,$connection) or die(mysql_error()); $result = mysql_fetch_array($request); $query2 = "SELECT * FROM `cysticUsers` WHERE `Email` = '". $_POST['email']."'