force the order of execution of code in conditional statements?

Similar Questions

• Control the order of execution of the init/release

  I have a small program that I write in LabView.  It has an API (one set of screws to wrapping the functions of the DLL to control a device).

  Other such programs in the Gayshop make liberal use of the structures of the sequence.  I understand that the sequence into LabVIEW structures are not usually recommended.  I am writing my program with the best style of LabVIEW (as far as I understand - I'm still a relative novice in LabVIEW).

  I found that I could wire together the error / mistake Terminal to create a data flow to control the order of execution and it works beautifully.

  However, there are some cases where it is not enough.

  Here is an example.  I hope that the answer to this will answer my other questions.  If this is not the case, perhaps that I'll post more.

  One of the first live I call is an Init function.  One of the last screw is the release function.

  The release function must be called at the end, after the rest of the program executed (in this case, it is after the user requests the stop).  It should be naturally at the end (or almost) of the error string in / out connections error (as it is currently).

  However, the error it receives, which will determine whether or not he will run, should be the output of Init.  Release should work even if something else has failed.

  I enclose a photo showing the problem, with most of the code snipped out (as exactly what is happening in the middle is not relevant).

  What is the elegant way to handle this in LabVIEW.  Is it really a deal for a structure of the sequence, or is there a way more pleasant or better?  How would you recommend handling?

  Thank you very much.

  BP

  I agree with what pincpanter said, more you will need to use the status of the function 'Init '.

  Note that you can ignore the error and make the merger within the Vi version if you wish.

  Steve

  

• Y at - it a State chart type or the flowchart describing the order of execution process model?

  One of my clients asked me this question...

  I have a problem with a change in the order of execution in TestStand 4.1.1.  [he has improved from 3.1 to 4.1.1]  It seems that ProcessModelPreStep runs earlier in 4.1.1 to 3.1.  This causes our model of error because some required variables have not been set when executing.  I wish that was a big flow chart or a diagram of the State for TestStand.  Maybe it is and I don't know where to look?

  The reminder that you describe is a reminder of engine and is independent of the process template.  There is a list of all actions and their order described in the TestStand reference manual in Chapter 3 of the section called "step Execution.  You will see the action 11 is a reminder of previous step motor.

  P. Allen

  NEITHER

• force the flow of execution

  I'm a newbie has arrived from VEE, so please be patient.

  Vee, I always sequence input pins and output sequence on any bow that allow me to force the execution of a box.

  In labview instead I'm not, so I guess that the execution order is always driven by data, correct them?

  Now, I just created a few local variables where I want to store internal information, so I have the objects in the front panel, and the 'local' connect to them in the chart:

  

  (as you can imagine, I'm changing a complex program, I didn't write it...)

  Now, since these couples: 'Acq length', 'timeIntensity', 'Acq Start time', in whole isn't all input/output, I don't see how to impose their execution. In fact, they are never executed...

  what I am doing wrong? Thank you for your help...

  alzyx wrote:

  > On the side right of the LabVIEW forum main page, there are links to tutorials.  Try them.

  Thanks for the suggestion...

  I am already tracking at least 3 manuals/tutorials in parallel,

  but nowhere I found an answer to this question.

  From what I've seen (Please correct if I am wrong), the execution goes according to:

  (1) the data flow

  (2) the error in / error on pins

  ... Since my case is not available, I'm really at a loss to know what to do.

  P.S. just in case my using local variables deemed not necessary: I transfer data using son whenever that is possible, but in this case I use inhabitants because I set a few values within a species a case structure, and I do use them in another case.

  If the transfer of data by wires between the cases is possible, I will be happy to hear!

  Alessandro

  You are on the right track, except that the error in and out is just another example of data flow.

  LabVIEW data flow can be summarized in two sentences:

  A node will not run as long as all entries are filled.

  A node will not produce output until the node has executed completely.

  When you boil everything down to basics, those are the only things that determine the flow of data.  If you take these two instructions literally, all cases where it seems that the execution order is ambiguous are really ambiguous - and you'd better fix it if a node is run before the other.

  It's really a case of 'easier said than done. "

• How to determine the order of execution of the structure of the event

  Hello world

  I have a structure of the event were it contains four events. All the four events a separate buttons to run. Here, three events generates a digital output, remains an event (Finder) should find the order of these three events. For example, three events namely A, B and C. I run events in the order B, C and has. The event finder should find the order of the events previously performed (B, C and A).

  Thanks in advance.

  
  

• Control the order of execution on a single page?

  I have been using cflock by mistake thinking it was for this purpose. Here's my number; I have an action page that accepts a JPG of a download file of a form field, and then runs the image via a custom tag ImageMagick twice (once to resize a thumbnail for display and once for resize/create), THEN the page is used to download 2 images on our remote server / backup.
  I inserted a cfloop that counts 6000 as a time stamp (see code)
  My problem is that the PCTCT begins to send the file uploaded before the tag of ImageMagick even to start his routine on the image, then is interrupted mid stream. The result is a server has a perfect pair of images, and the other Gets a perfect thumb and an original regular size truncated. It is unstable, but boring.
  
  Is there a command type cflock to frame commands on a page so Traoré progresses down the model only once the previous function is finished? I'm thinking old school "while" type of order, but I don't know where to start. Also, the file is renamed during the download (to avoid conflicts) to check if the file exists would not give the truth on resize is complete.

  Thanks for your reply, it is certainly a good idea. I modified the code to include a list of cfdirectory to check that the file exists and have also added a 'hold' for the first download to folder. Then the cf_magik will enter from there, resize and put the new & in their respective folders - in this way as an image thumb unresized cannot be FTP'd, because the auditor will not find the original of this record. I'm still using a cfloop, but only as a way to cycle trhu check the directory for the file:

• forcing the drop of object type in a create statement

  Hello everyone
  
  
  
  We are about to upgrade our customer database with some ddl scripts and to not worry what types of objects (nested tables) are new and which is old (where a drop of water is necessary), I'm looking for a way to do it all in one
  
  
  
  CREATE or REPLACE the STRENGTH & lt; Type & gt; AS AN OBJECT (...);
  
  
  
  In any case, when there is a type of collection for objects that I get < em > ORA-02303: cannot remove or replace a type of load type or the table < /em >
  
  
  I thought that the FORCE option will just delete and recreate? I don't want to delete anything manually. The collection type will be updated later with another script.
  
  
  
  Thanks in advance
  
  
  

  You don't have what I posted.

  Ok. Let me explain.

  You cannot drop or replace any existing object if it refers to any other type.

  So, you I don't think you can do in a simple process.

  You should know first of all the type of load on all objects. Then, you have to drop the first types that refer to these objects. And only then will you be able to upgrade your object.

  You can find the dependent objects like this->

  satyaki>
  satyaki>create or replace type sas_demo as object
    2      (
    3        v_nm          number(8),
    4        v_det         varchar2(45)
    5      );
    6  /
  
  Type created.
  
  Elapsed: 00:00:00.29
  satyaki>create or replace type sas_rec as table of sas_demo;
    2  /
  
  Type created.
  
  Elapsed: 00:00:04.44
  satyaki>
  satyaki>
  satyaki>exec dbms_utility.get_dependency('TYPE', 'SCOTT', 'SAS_DEMO');
  -
  DEPENDENCIES ON SCOTT.SAS_DEMO
  ------------------------------------------------------------------
  *TYPE SCOTT.SAS_DEMO()
  *   TYPE SCOTT.SAS_REC()
  
  PL/SQL procedure successfully completed.
  
  Elapsed: 00:00:03.27
  satyaki>
  

  Made me?

  Kind regards.

  LOULOU.

• Is there a way to force the transfer of files in a certain order?

  Hello
  XP sp3 running on computer dell laptop 6400.

  I'm trying to transfer an audiobook on an sd card and the need to keep the files in order. Periodically, one or two files are sent out of sequence. Since my Player reads the files in the order they were sent, this is unacceptable. Is there anything that I can force the orders files are sent?

  Thank you

  * original title - scrambled records *.

  The device creates a "playlist" because the files are copied, and so that they are copied.

  If the files are all in alphabetical or numerical order copy the files from the CD to the hard drive, then copy them to the hard drive of the machine with the copy command and a list of files at the command prompt.

  For example, to copy all audio files to a folder named book on the C: drive, and then from the command prompt try:

  for /f "tokens = *" %a in ('dir /b c:\book") copy 'c:\book\%a' x:\

  (where x: is the letter from SD card)

  John

• Question of operation sequence - order of execution of events

  Hello

  Im a VI to measure the current and the voltage across a writing device.

  To do this, I increment the tension, and for each increment, I measure voltage and current.

  I send SCPI commands to feeding and the meter with GPIB.

  My question is: in looking at my code, it seems that there is no dependence on the data between 'writing of power' (top left)

  and "write meter", while doing everything first?

  The program works fine, but I want to make sure that it is not out of pure luck.

  I am a beginner and I would appreciate more your help and comments.

  Thank you

  Nicolas

  Miguel_F wrote:

  Hi htnicolas,

  Two possible options to control the order of execution are:

  (1) use the structure of the sequence. (I guess it's preferable)

  (2) pass a parameter of a Subvi to another. Not sure whether it is advisable or not, but I spent one Subvi to another error to control the front execution order.

  Hope that helps a little.

  Actually the structure of the sequence is the least preferred method to apply the operation.  Data dependence is preferred (using the error string)

  LabVIEW is a language of stream - for you new guys this means that a block of code can if run as soon as all its inputs are available it does not matter what block which is a sub.vi, a business structure, a loop of what anyone with a boundrary that you can wire an input value.  Without dependence of data there is no easy way to determine what is happening in what order and LabVIEW will even go up to run a greater number of them AT the SAME TIME that you have available cores.  (Multithreading is easy in LabVIEW)

  It has been that the code would run from the back to the front, but many things have changed with the new compiler and optomizer, so this is true if the code is changed during compilation.

• Order of execution

  Hi can I want to know the order of the functions in the diagram below. Although all the functions to receive data at the same time why the functions of top down when I see highlight execution?

  

  The answer to your question, is that the order of execution is "unknown", or "variable" or "unpredictable."  If you impose another system on it (like that LabVIEW uses to "highlight the execution"), another set of 'unknown rules' may also come into play.

  The principle of data flow said that examples like your run in parallel to the best of the ability of the system - on a multi-core multi-threaded CPU, they might actually run in parallel on separate nuclei.

  When teaching LabVIEW, I use an example where I create a parallel structure and ask students to predict the order of execution.  I ran the same code several times, and always the order of execution of the parallel lines varied.

• What is the order of evaluation of Page elements

  I wonder what the order of execution of the page point assignments are in the page rendering process.
  Sequence (+ region), the Type of items, more skilled checking dependencies?
  I couldn't find anything here, or looked at with the wrong keywords.
  
  I just need to know, what reliable hypothesis on the dependencies between page elements?
  
  Which is visible in the APEX code? A pointer to that would be OK.
  
  Thank you very much
  Thomas

  Hello

  If you have a process 'Automated row fetch', then APEX will fill the session state of all elements on the page where source type = "Column DB" when the process is run.

  All other types of source page point are filled in the order that the elements of the page are rendered.

  Concerning
  Patrick
  -----------
  My Blog: http://www.inside-oracle-apex.com
  APEX Plug-Ins: http://apex.oracle.com/plugins
  Twitter: http://www.twitter.com/patrickwolf

  Published by: Patrick Wolf on November 15, 2012 13:47

• Order of execution model

  The States VS 2011 helps:

  ************************************

  
  

  Strap of model execution

  
  

  Each model run loop running a compiled template for. The number of loops execution model is determined by the number of models specified in system definition file. By iteration, the loop of each model is run performs the following tasks:

  • Reads the data sent by the primary control loop and maps those data to the inputs of the model.
  
  
  • Performs a single step of the model.
  
  
  • Reads the values of model output and sends this data to the primary control loop.

  **************************************

  Suppose that:

  • I have 3 models such as the output of each model is directed towards the entrance of the next model: model 1 model 2 > model 3
  
  
  • with channels correspondents mapping such as:
  
  

  Model1_output <---->Model2_input

  Model2_output <---->Model3_input

  • The order of execution is set to "parallel."
  
  
  • Decimation of model is set to 1 for all three.

  The three models will run within the same tick PCL "in parallel" in the context of loop PCL, while running in series in the time slot of ticks because of the way the channel map is defined?

  THX.

  L.

  Lol stream mapping does not determine the order of execution.  In parallel mode, the three models receive identical entries of the PCL.  These entries are based on the previous iteration of the system.  The outputs of the model of the iteration (N-1) update the PCL at the beginning of the iteration (N), and these updates are available as inputs of the model during the iteration (N).

  In your case:

  Check 1

  Write A for model 1, model 1 run and written was ' to PCL

  Tick 2

  Model 2 Gets A' starting from PCL, runs and writes A "to PCL

  Tick 3

  Model 3 Gets A "PCL, performs and writes A" ' to PCL

  If this is not desirable, you should put the standard models of the category of the order of execution under the Simulation models in System Explorer.  This makes the outputs of the model available on other models in the same iteration of the PCL.  Note, there is no output model available for the rest of the system until the next iteration of the PCL.

  

  Steve K

• Confusion in the order of line and statement-level trigger

  Hi can anyone tell me, if I create a trigger on the emp table as in order...
  
  BEFORE INSERTING... LINE LEVEL
  BEFORE INSERTING... LEVEL STMNT
  AFTER INSERTING... LINE LEVEL
  AFTER INSERTING... LEVEL STMNT
  
  
  that will be the order of execution of the trigers?
  How oracle will decide order?
  
  Please give me some documents related to the order of execution of triggers... thnx in advance... !

  PC says:
  Hello.. Obtained response on the order of... but 1 weird point I m feeling that

  in the case of, before insertion... stmnt fire triger level 1 then insert before... line.

  but in the case of after insert... fireing level trigger line then 1 after insertion... stmnt level...

  can you explain this also...

  Why is it so strange.

  You have a statement that you are running.

  The first possible thing is that you are 'before' the statement.

  The next thing that is possible is that the statement is executed for each line.

  So for each line, there is a 'before' to each line and a point "after" each line.

  Once the statement is executed, you are 'after' the statement.

  Thus, it makes sense the statement triggers surrounds education and line triggers are education, and of course 'before' comes before 'after '.

• Order of execution in a composite application and double ampersand

  Hello
  
  I had a doubt as to the order of execution of a compound query. As a general rule, I read his right to the left, up and down.
  I understand that once the value has been substituted to the variable must be explicitly undefined and all queries are working well.
  
  
  I'm confused by running the example below.
  
  1. when I run this example below that I've been invited twice .
  I guess once the results and which is assigned a value & & who should himself search for new value
  
  Select the function
  employees join jobs (job_id) using
  where employee_id = & who
  Union
  Select the function
  of job_history join jobs (job_id) using
  where employee_id = & & who;
  
  
  2. here in the example below, the value is currently not invited only once .
  . Is the lowest first executed query and if so why? Is there a special case in which this happens?
  
  
  Select the function
  employees join jobs (job_id) using
  where employee_id = & & who
  Union
  Select the function
  of job_history join jobs (job_id) using
  where employee_id = & who;
  
  
  the example below works fine with a prompt for value. Performs one of the *'& &' work as a single & *.
  
  Select the function
  employees join jobs (job_id) using
  where employee_id = & & who
  Union
  Select the function
  of job_history join jobs (job_id) using
  where employee_id = & & who;
  
  
  
  Help, please
  Thank you
  Jayshree

  Hi, Mary,

  to_learn wrote:
  Hello

  I had a doubt as to the order of execution of a compound query. As a general rule, I read his right to the left, up and down.

  Enforcement order has nothing to do with this problem.
  The substitution variables are resolved by SQL * more as it analyzes your order. I think he analyzes in order as it appears in your script, or on the command line as you type. Turn on "SET CHECK" to verify this.
  After SQL * more analysis of the command has completed, it passes the command (with replaced by their values for substitution variables) for the back-end, which compiles, and then only, executes the statement.

  I understand that once the value has been substituted to the variable must be explicitly undefined and all queries are working well.

  I'm confused by running the example below.

  1. when I run this example below that I've been invited twice .
  I guess the results & who is assigned a value once & who should himself search for new value

  It's true.
  Before you run the command, & which is not defined.

  Select the function
  employees join jobs (job_id) using
  where employee_id = & which

  Since & that is not defined, SQL * Plus asks you to give a value to it.
  After the analysis of this line, & who is still undefined, because you used a single &.

  Union
  Select the function
  of job_history join jobs (job_id) using
  where employee_id = & &whom;

  Since & that is not defined, SQL * Plus asks you to give a value to it.
  After the analysis of this line, & which is defined, because you used a double &. (Use the command SET to verify this.)

  2. here in the example below, the value is currently not invited only once .
  . Is the lowest first executed query and if so why? Is there a special case in which this happens?

  Yes, once, before running the script, & is not defined yet.

  Select the function
  employees join jobs (job_id) using
  where employee_id = & who

  Since & that is not defined, SQL * Plus asks you to give a value to it.
  After the analysis of this line, & which is defined, because you used a double &.

  Union
  Select the function
  of job_history join jobs (job_id) using
  where employee_id = &whom;

  Since & that IS defined, SQL * Plus, do not stop and ask you to provide a value for it.

  the example below works fine with a prompt for value. Performs one of the *'& ' work as a single & *.

  Yes; but I don't think it's a very useful way to think about. In fact, two of them work as single & s one way or another.
  Once again, & which is not defined at this stage.

  Select the function
  employees join jobs (job_id) using
  where employee_id = & who

  Since & that is not defined, SQL * Plus asks you to give a value to it.
  After the analysis of this line, & which is defined, because you used a double &.
  Using a single & cause also stop and ask. If the variable is not set, SQL * more stops and you request a value, regardless of whether you have used a single & double or &.

  Union
  Select the function
  of job_history join jobs (job_id) using
  where employee_id = & &whom;

  Since & that set, SQL * Plus you do not give a value for it.
  Using a single & would also result in the same behavior. If the variable is already defined, SQL * Plus, do not stop and you ask a value; It uses the previously given value, regardless of if you have used a single & double or &.

• Synchronization problem; Functions do not execute in the order specified

  I have a timing problem. Three functions are called
  in this order:

  InsertMenu();                  Inserts a record in the menu in the database
  getLastRecordId();           Gets the primary key of the inserted record just menu
  Stores recovered key in a textTextInput control
  PrepareMenuItemInsert(); Keys to textInput saved readings
  Inserts a menu item record, affecting a link
  menu using the stored key file

  Everything works but at the point when the PrepareMenuItemInsert() function
  runs, the textInput control has not yet been updated by the getLastRecordId()
  function and is empty. The link to the menu file will eventually be set to 0.

  Of course these functions run not sequentially in the order specified.

  Is there a way I can force the order or do the PrepareMenuItemInsert()
  function of wat up to what getLastRecordId() wrote the key value in the
  textInputControl?

  Scott

  I well enough to use SQL Server and ColdFusion to manage my data back-end and treatment, but the methodology is basically the same.  The methodology I use is as follows.

  Since Flex: Launch the call to write the data to the database (you have it already).  In Flex, make sure that the call to write the data expects a return value (string, int or a table) of the call.  You have too much already, but it is associated with the GetLastID() call.  These data must be returned from the call to the insert.  After you receive this value then you call the following sequence in the chain of events.  I gave examples of how make that call in Flex in the previous post.

  In the back-end processing: you receive the values from Flex to add to the database, I call them ValInt_1 and Val_Str_2 in the example below.  Place a lock on the database to ensure that only one instance of your application can write to the database at a given time.  Insert the data into the database. Get the value of the new PK of the database and place it in a variable. Release the lock that commit data in the database.  Return the variable.  In the CF, this is how I would do...

  INSERT INTO MyTable (ValInt_1, ValStr_2)

  VALUES (,

  )

  SELECT Max (DataCnt) as MyMax

  FROM MyTable

  Bottom line is writing data and return of the new PK is a flex appeal, a call that expects a value returned from your backend processing.  It's the return of the call to the database where you manage your sequence of events.  Do not forget that a call to any object or function in Flex seems to trigger its own thread, so the timing is not sequential at that time.  So, for me at least, the trick is to sequence the calls to other events and if the calendar is dependent on an event called the following sequence must then be moved to this call.  I.E. If the point C of the sequence cannot be run until it has and B are both done I followed this method:

  private function Set_A (): void {}

  DoStuff_for_A;

  Call_B (PassNeddedVars):

  }

  private Set_B(YourPassedVars:YourTypeAsNeeded):void {} function

  DoStuffFor_B (YourPassedVars);

  Call_C (PassNeededVarsForC);

  }

  private Set_C(YourPassedVars:YourTypeAsNeeded):void {} function

  DoStuffFor_C (YourPassedVars);

  }

  I know it's pretty generic, but sometimes it's easier...

  Have an ordinary day...

  KomputerMan ~ |  :-)