How do I read an entire file into a std::string in C++?

How do I read a file into a std::string, i.e., read the whole file at once? Text or binary mode should be specified by the caller. The solution should be standard-compliant, portable and...

Is double square brackets [[ ]] preferable over single square brackets [ ] in Bash?

A co-worker claimed recently in a code review that the [[ ]] construct is to be preferred over [ ] in constructs like if [ "`id -nu`" = "$someuser" ] ; then echo "I love you madly,...

What do lambda function closures capture?

Recently I started playing around with Python and I came around something peculiar in the way closures work. Consider the following code: adders=[None, None, None, None] for i in [0,1,2,3]: ...

scala - get class from a string

From Scala, I'm using a Java library that expects a class argument. Example: def service: OAuthService = new ServiceBuilder() ...

File copy action Android syntax error on tokens

The following code gives me an error at the place which I marked with~~~~ ~~~~. It says: Syntax error on token(s), misplaced construct(s) can anybody help me with this? I will be very thankful...

iterate over slices of an ndarray

Say I have a 3D numpy.array, e.g. with dimensions x y z, is there a way to iterate over slices along a particular axis? Something like: for layer in data.slices(dim=2): # do something with...

Checking whether something is iterable

In the MDN docs: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/for...of The for...of construct is described to be able to iterate over "iterable" objects. But is...

Scalable Contains method for LINQ against a SQL backend

I'm looking for an elegant way to execute a Contains() statement in a scalable way. Please allow me to give some background before I come to the actual question. The IN statement In Entity...

Why is the 'explicit' keyword allowing implicit conversions?

class Test { private: int value; public: void display(void) { cout << "Value [" << value << "]" << endl; } explicit Test(int i) { value=i; } }; int main() { Test a(5); Test...

How to convert nested loop construct into flow chart in C?

I'm drawing this code if (V > 24) { do { PWM(); while (I = 0) { RA5 = 0; LED(); I2C(); Delay_ms(1000); ...

Cannot construct a Request with a Request whose mode is 'navigate' and a non-empty RequestInit

Consider this sample index.html file. <!DOCTYPE html> <html><head><title>test page</title> <script>navigator.serviceWorker.register('sw.js');</script> </head> <body> <p>test...

A namespace-style import cannot be called or constructed, and will cause a failure at runtime

Strange stuff happening here, with TypeScript 2.7.2, in VSCode version 1.21 with @types/express and the code that follows, in some cases VSCode throws errors stating that "A namespace-style import...

symfony4 use .env config variables in a service

I am using a package that is not especially made for symfony (TNTsearch), and have put all the functions I want to use in a service I called TNTsearchHelper.php. This service requires some...

Uncaught TypeError: Failed to construct 'File': 2 arguments required, but only 1 present

I am writing a JavaScript to write file to the local directory in an aframe virtual reality application using Google Chrome. While debugging I've gotten this error: Uncaught TypeError: Failed to...

is there a way to specify a constructor for a groovy script?

I have a groovy script called Foo.groovy, an instance of that script can be constructed using the following syntax: def foo = new Foo() i know if Foo.groovy looks like: import...

Error during Deserialization of PageImpl : Cannot construct instance of `org.springframework.data.domain.PageImpl`

Issue is when using Spring cache with redis cache manager, not able to deserializer Spring Pageable response due to no default constructor The spring boot version used is 2.1.4.RELEASE Redis...

std::optional default constructor not being constexpr in gcc?

I have the following code to test my constexpr-constructible lazy class: https://godbolt.org/z/rMLCiL #include <optional> template <class T> class Lazy { using initializer_t = T (*)(); ...

How to construct/plot convex hulls of polygons from points by factor using sf?

I've got a dataset of species occurrences which I'm trying to convert into areas of occurrence by making convex hulls. I'm able to do this manually (ie. one species at a time) but I'd really love...

AWS CDK: how do I reference cross-stack resources in same app?

I have an App that has two stacks, both within the same region/account. One of those stacks requires the ARN of a lambda that exists in the other stack. How do I reference this? // within stackA...

When the method is called it is returning AttributeError

In this code, there's a Person class that has an attribute name, which gets set when constructing the object. It should do:1) when an instance of the class is created, the attribute gets set...

Python detect Gaussian Blur

I have the following codes to detect whether an input image is blurred. from imutils import paths import argparse import cv2 import os def variance_of_laplacian(image): # compute the Laplacian...

Kotlin MPP expect / actual with different signatures

I have a manager class that has an Android and iOS impl (from a 3rd party lib). "ex. MyManagerImpl()". To construct the 3rd party manager, iOS does not require a Context but Android does. I...

Snowflake dynamic SQL: Equivalent of DBMS_SQL/sp_executesql

I am searching for equivalent of sp_executesql/DBMS_SQL that would allow to execute dynamic SQL(ideally with binded parameters). Rationale behind: Generate the code to be run in SQL and execute...

Unhandled exception rendering component: '<' is an invalid start of a value for Blazor WASM

I have an API endpoint which allows anonymous. I have confirmed in Postman it is working for anonymous and authenticated users and returning proper JSON. Because the endpoint can be called...

MediaSessionCompat:Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be specified when creating a PendingIntent

I'm trying to update my application to Android SDK 31 but I'm having an issue with MediaSessionCompat. I have a MediaService that extends the MediaBrowserServiceCompat() and in method onCreate of...

Argument of type 'App' is not assignable to parameter of type 'Construct'

I am trying simple CDK tutorial, however I bumped into some error. My code is simply like this, Argument of type 'App' is not assignable to parameter of type 'Construct'. Type 'App' is missing the...

How to create AWS resources to run a CDK application locally using SAM?

I have an application called Example4Be, I have a stack that creates the AWS non-Lambda resources (just DynamoDB in this case, but could be SQS, SNS, etc): import * as cdk from...

Select previous and next N rows with the same value as a certain row

I construct the following panel data with keys id and time: pdata <- tibble( id = rep(1:10, each = 5), time = rep(2016:2020, times = 10), value = c(c(1,1,1,0,0), c(1,1,0,0,0), c(0,0,1,0,0),...

How to implement fixed points of functors in Java

I recently discovered how to simulate higher order types in Java in a somewhat roundabout way like so interface H<F, T> { } Here H encodes a higher order type that takes a type parameter F...

How to sort and chunk a dependency tree of actions, so you can batch as many actions as possible together at each step?

Say you have a bunch of actions for creating/inserting records into a bunch of different database tables. You have some records which can be inserted without any dependency on the output of any...