lambda

问题 Sorry for this loaded question. I. TL;DR: The /tmp directory on AWS Lambda keeps filling up when it shouldn't and gives me ENOSPC error on subsequent request. II. The TL version: I have a microservice built with Node JS (0.10x) on AWS Lambda that does 2 things: Given a list of urls, it goes to relevant sources (S3, Cloudfront, thumbor, etc.) and download the physical files into the /tmp directory After downloading all of these files, it will compress them into a tar ball and upload to S3.

问题 Description How to create a pointcut for Runnable.run method So that @Before and @After aspect can be invoked in java 8 lambda expression. Create pointcut for Runnable.run method Create @Before aspect for pointcut in step 1 . ---> Print Before runnbale Create @Aefore aspect for pointcut in step 1 . ---> Print After runnable When below line invoked executor.runAsync(() -> { System.out.println("Runnable invoked"); } ) Output expected : Before runnable Runnable invoked After runnable Solution

问题 Within the C++ language, many will come across various design patterns that have a designated name in which we would call an Idiom, such as SFINAE , RAII , CRTP , Polymorphism , etc... Consider this following code snippet in its most basic form... template<typename T> auto make_object = [](T val) { class Foo { public: Foo(T val) : value_{val} {} T value() const { return value_; } private: T value_; }; Foo foo(val); return foo; }; // in some other code block, scope, or translation int main() {

问题 The sample codes bellow retrieve all the runing procces and print them. They've bee written following the 3rd example here and final one from here. Problem is I cannot figure out why only the first one retrieves process sorted as desired. I think it is related to the lambda function construction. But the rightly running sample, the first one, seems to mix the local p variable of the for statement with the p.dict dictionary, making me get stuck. First Sample: import psutil procs = [] for p in

问题 I'm in a situation in a multithreaded environment where I have a thread that receives data from a socket, and I want to send that data into a messaging queue. For instance, something like this: char buf[N]; size_t len = ::recv(buf, ...); queue.send([buf,len] { //stuff }); But that won't work since buf could go out of scope, or get overwritten by the next ::recv() . Now I COULD copy it into a string / std::vector /whatever and pass THAT thing by value: char buf[N]; size_t len = ::recv(buf, ...

问题 How do I sort a text file by three columns with a specific order to those columns in Python? My text_file is in the following format with whitespaces between columns: Team_Name Team_Mascot Team_Color Team_Hometown Number_of_Wins Team_Coach Example: Bears LittleBear Blue Beartown 15 BigBear I want to sort it by Team_Color first, Team_Hometown second, and Number_of_Wins third in ascending order. Therefore the attributes: Bears Blue Beartown 15 Coach1 Bears Red Dogtown 30 Coach6 Bears Blue

问题 How do I sort a text file by three columns with a specific order to those columns in Python? My text_file is in the following format with whitespaces between columns: Team_Name Team_Mascot Team_Color Team_Hometown Number_of_Wins Team_Coach Example: Bears LittleBear Blue Beartown 15 BigBear I want to sort it by Team_Color first, Team_Hometown second, and Number_of_Wins third in ascending order. Therefore the attributes: Bears Blue Beartown 15 Coach1 Bears Red Dogtown 30 Coach6 Bears Blue

问题 How to finish the convertion of the following query to Expression tree syntax, using an anonymous type in the .Where() and .Select()? IQueryable<A> As = db.A .Join( db.B, _a => _a.bID, _b => _b.ID, (a, b) => new { a, b }) //next two are the objective .Where(s=> s.b.Name == "xpto") .Select(s => s.a); At this point I have (Thanks to @NetMage): //QUERY DB with GENERIC TYPE IQueryable<B> queryable = (IQueryable<B>)db.B; // IQueryable<TOuter> var arg0 = Expression.Constant(db.A.AsQueryable()); //

问题 I have a Worker object and use its method moveToThread to put it in a thread. Now i call its work method: If I invoke the method directly, it is executed in the thread its object is living in If I invoke the method using lambda, the method is executed in the main thread Example: from PySide.QtCore import * from PySide.QtGui import * import sys class Worker(QObject): def __init__(self): super().__init__() def work(self): print(self.thread().currentThread()) class Example(QWidget): def __init__

问题 I kept getting errors while compiling. I have no idea how to use the list generated integers and display it into the jButtons after clicking. public static void Random () { int Rand [] = new int [49]; for (int b = 0; b < 49; b++) Rand [b] = b; List<Integer> alist = Arrays.stream(Rand) .boxed() .map (x -> x + 1) .collect (Collectors.toList()); Collections.shuffle(alist); } private class HandleTextField implements ActionListener { @Override public void actionPerformed(ActionEvent event) { for