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.net - What is the C# Using block and why should I use it?

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asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - Refactor a PL/pgSQL function to return the output of various SELECT queries

I wrote a function that outputs a PostgreSQL SELECT query well formed in text form. Now I don't want to output a ... and return the result. How can I do that? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to add local .jar file dependency to build.gradle file?

So I have tried to add my local .jar file dependency to my build.gradle file: apply plugin: 'java' sourceSets ... /github.com/WalnutiQ/wAlnut/tree/version-2.3.1 Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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node.js - How to solve npm error "npm ERR! code ELIFECYCLE"

I'm trying to learn react, so I have this sample code for the full-stack react voting app, and I am trying to ... output above. 25 verbose exit [ 1, true ] Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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xmlhttprequest - How does JavaScript handle AJAX responses in the background?

Since JavaScript runs in a single thread, after an AJAX request is made, what actually happens in the background? ... into this, can anyone shed some light? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Using jQuery $(this) with ES6 Arrow Functions (lexical this binding)

Using ES6 arrow functions with lexical this binding is great. However, I ran into an issue a moment ago using ... Traceur ignore "$(this)" for lexical binding? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Is there a CSS selector for text nodes?

What I would like to do (not in IE obviously) is: p:not(.list):last-child + :text { margin-bottom: 10px; ... possible?) How would I get the text node with CSS? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - How do parameterized queries help against SQL injection?

In both queries 1 and 2, the text from the textbox is inserted into the database. What's the ... Expression validation to stop insertion of illegal characters. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - Java using much more memory than heap size (or size correctly Docker memory limit)

For my application, the memory used by the Java process is much more than the heap size. ... https://gist.github.com/prasanthj/48e7063cac88eb396bc9961fb3149b58 Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Get element from within an iFrame

How do you get a <div> from within an <iframe>? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - Nesting await in Parallel.ForEach

In a metro app, I need to execute a number of WCF calls. There are a significant number of calls to be ... Console.WriteLine(customer.ID); } Console.ReadKey(); Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - What do parentheses surrounding an object/function/class declaration mean?

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asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Get a random item from a JavaScript array

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asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - Why is lock(this) {...} bad?

The MSDN documentation says that public class SomeObject { public void SomeOperation() { lock(this) { //Access ... ? Or is there some more insidious reason? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Passing data between controllers in Angular JS?

I have a basic controller that displays my products, App.controller('ProductCtrl',function($scope,$productFactory){ ... to drop product is pretty hardcoded. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Is there a way to crack the password on an Excel VBA Project?

I've been asked to update some Excel 2003 macros, but the VBA projects are password protected, and it seems ... or cracking the password on a VBA project? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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AngularJS : Prevent error $digest already in progress when calling $scope.$apply()

I'm finding that I need to update my page to my scope manually more and more since building an application in ... achieve the same thing but in a different way? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to use Jackson to deserialise an array of objects

The Jackson data binding documentation indicates that Jackson supports deserialising "Arrays of all supported types" but I ... If not then what is the solution? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to call a method after a delay in Android

I want to be able to call the following method after a specified delay. In objective c there was something like: ... void DoSomething() { //do something here } Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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How can I reverse a list in Python?

How can I do the following in Python? array = [0, 10, 20, 40] for (i = array.length() - 1; i >= ... elements of an array, but from the end to the beginning. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Sending POST data in Android

I'm experienced with PHP, JavaScript and a lot of other scripting languages, but I don't have a lot of ... data to a PHP script and display the result. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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routing - Is it possible to make an ASP.NET MVC route based on a subdomain?

Is it possible to have an ASP.NET MVC route that uses subdomain information to determine its route? For ... same controller/action with a username parameter? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Allowed memory size of 33554432 bytes exhausted (tried to allocate 43148176 bytes) in php

This error message is being presented, any suggestions? Allowed memory size of 33554432 bytes exhausted (tried to allocate 43148176 bytes) in php Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - ListAGG in SQLSERVER

I'm trying to aggregate a 'STRING' field in SQLServer. I would like to find the same function LISTAGG like in Oracle . Do ... of this query will be 1 | AB 2 | A Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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perl - Why is XML::Simple Discouraged?

From the documentation of XML::Simple: The use of this module in new code is discouraged. Other modules are available ... me what the key reasons for this are? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - What does "Incompatible types: void cannot be converted to ..." mean?

What does the Java compilation message: "Incompatible types: void cannot be converted to ..." mean, and how do ... " problems that one can encounter in Java.) Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - When is a CDATA section necessary within a script tag?

Are CDATA tags ever necessary in script tags and if so when? In other words, when and where is this: <script type=" ... ="text/javascript"> ...code... </script> Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How to modify list entries during for loop?

Now I know that it is not safe to modify the list during an iterative looping. However, suppose I ... Does replacement of mutable values count as modification? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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