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multipartform data - Uploading file using POST request in Node.js

I have problem uploading file using POST request in Node.js. I have to use request module to accomplish that (no external npms). ... .log('URL: ' + body); } }); Question&Answers:os...

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

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What is a converting constructor in C++ ? What is it for?

I have heard that C++ has something called "conversion constructors" or "converting constructors". What are these, and what are ... main() { MyClass M = 1 ; } Question&Answers:os...

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

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206 views

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postgresql - What are '$$' used for in PL/pgSQL

Being completely new to PL/pgSQL , what is the meaning of double dollar signs in this function: CREATE OR REPLACE ... the way, what does the last line mean? Question&Answers:os...

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

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javascript - Get index of element as child relative to parent

Let's say I have this markup: <ul id="wizard"> <li>Step 1</li> <li>Step 2</li> </ul> And I have this ... click "Step 1", an alert with "0" should pop up. Question&Answers:os...

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

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230 views

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c# - How to create a .NET DateTime from ISO 8601 format

I've found how to turn a DateTime into an ISO 8601 format, but nothing on how to do the reverse ... for something that is already an international standard. Question&Answers:os...

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

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android: broadcast receiver for screen on and screen off

I was just wondering if it is possible to register a broadcast receiver that detects Screen ON/OFF in the application ... ",Toast.LENGTH_LONG).show(); } } } Question&Answers:os...

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

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Read pdf files with php

I have a large PDF file that is a floor map for a building. It has layers for all the office furniture including ... Ruby or Python if that's what's necessary) Question&Answers:os...

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

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208 views

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sql - Difference between Oracle's plus (+) notation and ansi JOIN notation?

What's the difference between using oracle's plus notation (+) over the ansi standard join notation? Is ... in performance? Is the plus notation deprecated? Question&Answers:os...

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

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python - Extract part of a regex match

I want a regular expression to extract the title from a HTML page. Currently I have this: title = re.search('<title>. ... > so I don't have to remove the tags? Question&Answers:os...

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

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209 views

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java - Getting the text that follows after the regex match

I'm new to using Regex, I've been going through a rake of tutorials but I haven't found one that applies to what I ... .out.println("I didn't find the text"); } Question&Answers:os...

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

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php - Forcing a SimpleXML Object to a string, regardless of context

Let's say I have some XML like this <channel> <item> <title>This is title 1</title> </item> </ ... a SimpleXML object to a string, regardless of context? Question&Answers:os...

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

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POST multipart/form-data with Objective-C

So this HTML code submits the data in the correct format for me. <form action="https://www.example.com/register.php" ... the code to POST this in Obj-C? Thanks! Question&Answers:os...

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

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173 views

1 answer

Passing a structure through Sockets in C

I am trying to pass whole structure from client to server or vice-versa. Let us assume my structure as follows ... of code added just to send or receive data. Question&Answers:os...

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

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415 views

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javascript - SyntaxError: Use of const in strict mode

I'm working with node.js, and in one of my js files I'm using const in "strict mode". When trying to run ... strict' const MAX_IMAGE_SIZE = 1024*1024; // 1 MB Question&Answers:os...

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

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980 views

1 answer

serialization - Why Java needs Serializable interface?

We work heavily with serialization and having to specify Serializable tag on every object we use is kind of a burden. ... and that's it? What am I missing? Question&Answers:os...

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

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135 views

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c# - still confused about covariance and contravariance & in/out

ok i read a bit on this topic on stackoverflow, watched this & this, but still a bit confused about co ... this question has been asked but still very confused. Question&Answers:os...

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

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66 views

1 answer

c# - Calling JavaScript Function From CodeBehind

Can someone provide good examples of calling a JavaScript function From CodeBehind and Vice-versa? Question&Answers:os...

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

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110 views

1 answer

c++ - Non-type template parameters

I understand that the non-type template parameter should be a constant integral expression. Can someone shed light why ... ::string as in the above snippet ? Question&Answers:os...

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

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1.0k views

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scope - Global variables in Javascript across multiple files

A bunch of my JavaScript code is in an external file called helpers.js. Inside the HTML that calls this JavaScript ... Is what I am trying to do even feasible? Question&Answers:os...

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

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148 views

1 answer

.net - printing all contents of array in C#

I am trying to print out the contents of an array after invoking some methods which alter it, in Java I use: System.out. ... alg.id)); how do I do this in c#? Question&Answers:os...

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

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454 views

1 answer

algorithm - Find all paths between two graph nodes

I am working on an implemtation of Dijkstras Algorithm to retrieve the shortest path between interconnected nodes on a ... from Node A and back to Node A Question&Answers:os...

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

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228 views

1 answer

android - Receiving package install and uninstall events

I am trying to detect when a new App is being installed but only if my app is running. I managed to ... enter in the onReceive method. Any help is appreciated. Question&Answers:os...

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

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508 views

1 answer

swing - How can I get screen resolution in java?

How can one get the screen resolution (width x height) in pixels? I am using a JFrame and the java swing methods. Question&Answers:os...

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

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225 views

1 answer

parsing - What is the difference between an Abstract Syntax Tree and a Concrete Syntax Tree?

I've been reading a bit about how interpreters/compilers work, and one area where I'm getting confused ... between an AST and CST somewhat artificial? Question&Answers:os...

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

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273 views

1 answer

android - Can I have onScrollListener for a ScrollView?

I am using a HorizontalScrollView in a layout and I need to identify the user have reached the start and end ... other possible ways to achieve what I need. Question&Answers:os...

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

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120 views

1 answer

php - Using Jquery Ajax to retrieve data from Mysql

list.php: A simple ajax code that I want to display only records of the Mysql table: <html> <head> <script src="jquery ... /tr>"; } ?> This code is not working. Question&Answers:os...

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

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316 views

1 answer

c# - How to change the timeout on a .NET WebClient object

I am trying to download a client's data to my local machine (programatically) and their webserver is very, very ... - it just takes about 3 minutes to show. Question&Answers:os...

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

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253 views

1 answer

javascript - How do I remove a file from the FileList

I'm building a drag-and-drop-to-upload web application using HTML5, and I'm dropping the files onto ... interacts with the FileList? That seems cumbersome. Question&Answers:os...

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

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