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Variable within for loop giving max value


Variable within for loop giving max value

By : user2951441
Date : November 18 2020, 11:13 AM
This might help you This is similar to this question: JavaScript closure inside loops – simple practical example
That answer explains the why things are acting the way they are.
code :
function a(){
  var i = 0;
  var callbacks = [];
  
  for (i=0;i<100;i+=25){
    callbacks.push(function(){
      alert(i);
     });
  }
  
  return callbacks;
}


var callbackArray = a();
for( f in callbackArray){
  callbackArray[f]();
}
function createFunction(i){
   return function(){
     alert(i);
   }
}

function a(){
      var i = 0;
      var callbacks = [];
      
      for (i=0;i<100;i+=25){
        callbacks.push(createFunction(i));
      }
      
      return callbacks;
    }


    var callbackArray = a();
    for( f in callbackArray){
      callbackArray[f]();
    }
// outside of the code you posted, as a separate function.
function createPlayerSelectionCallback(data,i){
    return function(err, result, fields) {
                if (err) throw err;
                if(result.length==0){
                    //var insertQuery = "INSERT INTO player (provider_id, team_id, position_id, name) VALUES (1, (SELECT id FROM team WHERE slug = '"+data[i+1]+"'),1,'"+data[i]+"');";
                    console.log(i);    
                }
            }
}


// this for loop stays in the same place, just modified to use the new function.
 for(i=1;i<data.length;i+=26){
    var query = connection.query(
    "SELECT * FROM player WHERE name = '"+data[i]+"'",createPlayerSelectionCallback(data, i))
 }


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windows batch giving error if for loop has empty variable

windows batch giving error if for loop has empty variable


By : user2235389
Date : March 29 2020, 07:55 AM
like below fixes the issue I'm trying to do a simple if like this
code :
if "%REGEDIT_HOME%"=="" (
if  defined REGEDIT_HOME (
Python – UnboundLocalError: local variable 'p' referenced before assignment. While Loop giving different outputs dependi

Python – UnboundLocalError: local variable 'p' referenced before assignment. While Loop giving different outputs dependi


By : user3651954
Date : March 29 2020, 07:55 AM
Does that help You're initializing p in your try block but trying to use it after the code in except runs. If you get a ValueError you get p was referenced before assignment. How to solve: initialize p before the try block
code :
p=None
try:
    # do smth
except:
    # do smth
Enter a character as an input to an integer variable, giving an infinite loop

Enter a character as an input to an integer variable, giving an infinite loop


By : user1591395
Date : March 29 2020, 07:55 AM
will be helpful for those in need A proper fix to your code would be the below snippet. Check if scanf() was successful and then proceed
code :
if (scanf("%d", &number) != 1)
{
        break;
}
createBinaryTree is giving an infinite Loop and createBinarySearchTree is giving segmentation Fault

createBinaryTree is giving an infinite Loop and createBinarySearchTree is giving segmentation Fault


By : user3559459
Date : March 29 2020, 07:55 AM
hop of those help? For the BinarySearchTree. In the first iteration, you setting the new node to NULL in every iteration. It would be better to first check the value of the node and then decide, which direction to traverse the tree in. When you hit the root add the node. Something like the following.
Take input of root separately so that you can compare the next input.
code :
        case 1:
        printf("Enter Root Node\n");
        scanf(" %d", &tempvalue);
        NODE root;
        root = (NODE)malloc(sizeof(struct node));
        root->data = tempvalue;
        while (tempvalue != -1)
        {   
            printf("Enter Node Value\n");
            scanf(" %d", &value);
            if(value == -1){
                break;
            }
            root = createBinarySearchTree(root, value);
        }
        return 0;
NODE createBinarySearchTree(NODE root, int ele)
{
    NODE new_node;
    new_node = (NODE)malloc(sizeof(struct node));
    new_node->data = ele;

    if (root == NULL)
        return new_node;

    NODE curr = root;

    while (curr != NULL)
    {
        printf("%d\n",curr->data);
        if(ele < curr->data )
        {
            if(curr->lchild == NULL){
                printf("inserted %d as left child of %d\n",ele,curr->data );
                curr->lchild = new_node;
                return root;
            }
            curr=curr->lchild;
        }
        else if(ele > curr->data)
        {
            if(curr->rchild == NULL){
                printf("inserted %d as right child child of %d\n",ele,curr->data );
                curr->rchild = new_node;
                return root;
            }
             curr=curr->rchild;
        }
    }
    return root;
}
How is declaring a new variable inside a loop NOT giving errors?

How is declaring a new variable inside a loop NOT giving errors?


By : afshin azad
Date : March 29 2020, 07:55 AM
will help you Declaring a variable inside a loop makes the variable only available in the scope of that instance in the loop. Basically, each iteration of the loop, the variable gets created and goes out of scope (is "forgotten") at the end of the iterations.
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