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confused regading AWS lamda function execution limits


confused regading AWS lamda function execution limits

By : Nadiah A
Date : November 24 2020, 05:47 AM
With these it helps On October 10, 2018 the execution time limit for AWS Lambda functions was increased from 5 minutes to 15 minutes.
Therefore, you will still see many references to the old 5 minute limit.
code :


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PHP Prevent simultaneous function execution (throttling limits via PHP)

PHP Prevent simultaneous function execution (throttling limits via PHP)


By : Alexandra Fedorowna
Date : March 29 2020, 07:55 AM
Any of those help I believe you need some implementation of a semaphore. The database could work, as long as you can guarantee that only one thread gets to write to the db and then make the request.
For example, you might use an update request to the db and then check for the updated rows (in order to check whether the update actually happened). If the update was succesful you can assume you got the mutex lock and then make the request (assuming the time is right to make it). Something like this:
code :
$oldTime = $this->getTimeFromDatabase();
if ($oldTime < (time() - 2) && $this->getLock()) { // if its been 2 seconds
  $this->setNewTimeInDatabase(); 
  $this->releaseLock();
  return true;
} else {
  sleep(2);
  return false;
}  

function getLock()
{
    return $mysqli->query('UPDATE locktable set locked = 1 WHERE locked = 0');
}

function releaseLock()
{
     $mysqli->query('UPDATE locktable set locked = 0');
}
Confused by order of execution with a print function call as a function argument

Confused by order of execution with a print function call as a function argument


By : sravan
Date : March 29 2020, 07:55 AM
seems to work fine The print statement returns None, which you are passing to your function as the second argument.
What happens when you call func("1", print("hi")) is that print("hi") will be executed, so you will see hi first. After that, func("1", None) is called, which will do
code :
print("1")
None
None
confusion about lamda and function

confusion about lamda and function


By : matteo ferrone
Date : March 29 2020, 07:55 AM
hope this fix your issue If you want to pass a function of a class as an argument, you should use function reference (also called callable reference / function literal).
code :
val result = check(::itsAfunction)
val result = check { itsAfunction() } //<-- enclosing () is omitted because trailing lambda
inline fun check(func: () - > Int) = func() + 9
How to pass lamda as a function pointer argument of member function?

How to pass lamda as a function pointer argument of member function?


By : user2979124
Date : March 29 2020, 07:55 AM
hop of those help? one option is making your functions static and then use std::function as type:
code :
using funcType = std::function<int(int, int)>;
int myFunc(funcType func, int a, int b)
{
    return func(a, b);
}

void setup()
{
    cout << myFunc(Test::add, 5, 3) << endl;
    cout << myFunc(Test::sub, 5, 3) << endl;
    cout << myFunc([](int a, int b) {return a * b;}, 5, 3) << endl;
}
typedef int (*funcPtr)(int a, int b);
//or:
//using funcPtr =  int (*)(int a, int b);
int myFunc(funcPtr func, int a, int b)
{
    return (*func)(a, b);
}
template<typename funcType>
int myFunc(funcType func, int a, int b)
{
    return func(a, b);
}
void setup()
{
    cout << myFunc(Test::add, 5, 3) << endl;
    cout << myFunc(Test::sub, 5, 3) << endl;
    cout << myFunc([](int a, int b) {return a * b;}, 5, 3) << endl;
}
using funcPtr = int(Test::*)(int a, int b);
int myFunc(funcPtr func, int a, int b)
{
    return invoke(func, this, a, b);
}

//..
// call:
cout << myFunc(&Test::add, 5, 3) << endl;
Connect the DAX to lamda function in aws VPC

Connect the DAX to lamda function in aws VPC


By : b0z
Date : March 29 2020, 07:55 AM
around this issue Can you check the security group configuration on the security group used to launch the DAX cluster? You will need to authorize inbound traffic on TCP port 8111 on the security group used to launch the cluster, using the security group used for the lambda function configuration as the source. Please refer to the documentation for more help.
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