logo
down
shadow

how to get to field of 2D object dynamic array?


how to get to field of 2D object dynamic array?

By : B. Dan
Date : November 21 2020, 11:01 PM
it fixes the issue The problem is exactly what it says that it is; you are attempting to modify a private attribute from another object. In this line:
code :
     if(t[i][j].state_current==true)//first crash
boolean Cell::status()
{
  return state_current;
}
if(t[i][j].status()==true)


Share : facebook icon twitter icon
Is it good practice to use a Dynamic Array in an object field?

Is it good practice to use a Dynamic Array in an object field?


By : achagani
Date : March 29 2020, 07:55 AM
around this issue Dynamic arrays are great, but really only for fixed dimentions. If they have to grow, especially in single record increments, this can cause eventual errors from the memory manager (and possible performance issues) since the array has to be reallocated and copied to the new bigger destination. TList does at least have a 'growing' mechanism that is called less frequently.
Invalid object name #temp in Dynamic SQL and Array of field names

Invalid object name #temp in Dynamic SQL and Array of field names


By : user4828945
Date : March 29 2020, 07:55 AM
seems to work fine The temp table is out of scope after exec is done.'exec' or 'sp_executesql' are run in thier own scope. Thus anything created like temp tables and variables are destroyed or out of scope as soon as execution is over .Think these like stored proc.
To fix the issue.Create the temp table in main code.. then insert into it using dynmic sql and then read it in main code.
Displaying multi-subquery, dynamic field, dynamic object SOQL query results on a VF page

Displaying multi-subquery, dynamic field, dynamic object SOQL query results on a VF page


By : Ken Reinhart
Date : March 29 2020, 07:55 AM
help you fix your problem In these situations I always rely on an object relational mapper pattern, or referred to simply as a wrapper class. For the trickier fields, what you wind up displaying are single level, class member abstractions rather than fields directly from the result of a SOQL statement. One benefit of this is that you can simply do a few SOQL calls, prepare the data in any way that will best support your page and then render it smoothly. The additional work of having this abstraction class pays off very well in the end - imo.
Here's a related post that shows exactly how to do this in Apex. In your case, you would extend on this example to add the values of multiple SObjects to one instance of this "ORM-style" class and then populate a list of instances of it from within Apex. This list of custom object instances becomes perfect food for Visualforce to consume.
Array.reduce() group by object field and extend all other fields to their corresponding grouped object field

Array.reduce() group by object field and extend all other fields to their corresponding grouped object field


By : user2918093
Date : March 29 2020, 07:55 AM
Hope this helps You could merge each object depending on key name on each loop with reduce:
code :
let doc = [{"car": "Ford","prices": ["12", "3", "5", "1"],"model": "SUV"},{"car": "Ford","prices": ["99","88","77"],"model": "T3"},{"car": "Toyota","prices": ["33","44","55"],"model": "Subaru"},{"car": "Toyota","prices": ["66", "50", "22"],"model": "Cheyenne"},{"car": "Peugeot","prices": ["1","2","3"],"model" : "503"}];

let CarDoc = doc.reduce((a, {car, prices, model}) => {
  if(a[car]) {
    prices.forEach(p => a[car].prices.push(p))
    a[car].model = [...a[car].model, model]
  } else {
    a[car] = {prices, model:[model]}
  }
  return a
}, {})

console.log(CarDoc)
let doc = [{"car": "Ford","prices": ["12", "3", "5", "1"],"model": "SUV"},{"car": "Ford","prices": ["99","88","77"],"model": "T3"},{"car": "Toyota","prices": ["33","44","55"],"model": "Subaru"},{"car": "Toyota","prices": ["66", "50", "22"],"model": "Cheyenne"},{"car": "Peugeot","prices": ["1","2","3"],"model" : "503"}];

let CarDoc = doc.reduce((a, {car, prices, model}) => a[car] ? {...a, [car]: {prices: a[car].prices.concat(prices), model: a[car].model.concat(model)}} : {...a, [car]: {prices, model:[model]}}, {})

console.log(CarDoc)
let doc = [{"car": "Ford", test: 'test', "prices": ["12", "3", "5", "1"],"model": "SUV"},{"car": "Ford", test: 'test', "prices": ["99","88","77"],"model": "T3"},{"car": "Toyota","prices": ["33","44","55"],"model": "Subaru"},{"car": "Toyota","prices": ["66", "50", "22"],"model": "Cheyenne"},{"car": "Peugeot","prices": ["1","2","3"],"model" : "503"}];

let CarDoc = doc.reduce((a, {car, ...rest}) => {
  Object.entries(rest).forEach(([k,v]) => {
    if(a[car]) {
      a[car][k] = [...a[car][k] || [], v]
    } else {
      a[car] = {...a[car], [k]: [v]}
    }
  })
  
  return a
}, {})

console.log(CarDoc)
mongodb, Updating a field in an object in array field equal to a document field

mongodb, Updating a field in an object in array field equal to a document field


By : ralfingo
Date : March 29 2020, 07:55 AM
Hope this helps let's say I have docs such as , Try this (v4.2):
code :
db.users.updateMany(
    {"comments.nickname":null},
    [
        {"$set": {"comments.nickname": "$nickname"}}
    ]
)
db.users.aggregate([
  {
    $match: {
      "comments.nickname": null
    }
  },
  {
    $addFields: {
      comments: {
        $map: {
          input: "$comments",
          in: {
            id: "$$this.id",
            nickname: {
              $cond: [
                "$$this.nickname",
                "$$this.nickname",
                "$nickname"
              ]
            }
          }
        }
      }
    }
  },
  {
    $out: "users"
  }
])
Related Posts Related Posts :
  • xgboost build error on CentOS 6.8
  • How can I sort elements of a vector by row using std::sort
  • Using an std::function for wrapping a function object
  • How to add a Combobox or browse option in one particular row of a grid control using CMFCPropertyGridProperty class
  • update curl on centos
  • How can I use Linguist in Qt without .pro file?
  • reduce data to be sent over UDP sockets
  • cudaModuleLoadData fails with error code 201
  • C++ code not compiling with gcc on Mac?
  • Editing the value in an unordered map for a given key
  • How do call C++ function through Delphi wrapper
  • How could I link the Boost (not in usr/include) in CMakeList.txt using find_package
  • C++, Linker Issue returning undefined reference
  • Can you use std::string in a 3rd party dll?
  • Why does this use of std::sort with a custom comparator not compile?
  • Fixed base address in MSVC2015
  • Armadillo C++ Matrix Library - simplest way to initialize all values in a matrix to 999?
  • How do you end while loop
  • C++ Basic While Loop: Unknown Inputs and Value Increment
  • Cmake build failed with CMAKE_AR-NOTFOUND (cr exe not found)
  • c++ typeid on class member operator() overloads
  • Different size of string showing when going by two different methods
  • what the meaning "source of entropy of sth." on stack
  • wxWidgets - wxStyledTextCtrl - Text alignment RTL
  • get the entry point to a 64bit process memory from a 32bit process
  • Stroustrup: For C++, how do I install FLTK library?
  • Getting a word after a certain character?
  • How can I convert a char vector to a char array?
  • Comparing vectors of different length c++
  • How do I add four seperate times together?
  • How to replace data in a certain node in a linked list?
  • Prepared statements in C++ libneo4j_client?
  • FindFirstVolume does not return EFI system partition
  • User Inputs Value, but Arbitrary Value Printed to Screen. Printed Value doesn't Match Entered Value
  • How to work with std::make_unique function and interface classes?
  • Refresh image in command line (C++)
  • How to flip a Char array with pointers in C++
  • Outputting time in minutes and seconds C++
  • Creating a for loop to continue to count
  • Multiple class object share common variable
  • Why is my multi-threaded program not terminating properly?
  • How do I open a file in C++ using just the filename?
  • QT DOMXml - Change the name of a node
  • Using undeclared list as argument in c++
  • While loop won't continue
  • If/else if always goes to else statement
  • Why shared_timed_mutex is defined in c++14, but shared_mutex in c++17?
  • Confused by pipes. 'cat -A' seems to filter out part of output
  • Cannot open source file gtest/gtest.h
  • How to get a certain word in string of getline?
  • glGetShaderInfoLog to std::string?
  • Read in a certain line only?
  • C++ Vector read access violation Mylast returned 0x8
  • In C++ why is ifstream getline returning every other number in my .txt file, rather than all of them?
  • Can't convert string to int in return. No string variable declared whatsoever in int returning function getsocial()
  • Segmentation fault due to size() function of self-implemented data structure in C++
  • i need help making this little c++ program work
  • Template function wrapper
  • static variable in #define directive c++
  • In Qt MainWindow, why does an instance have a pointer to an instance?
  • shadow
    Privacy Policy - Terms - Contact Us © soohba.com