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javascript - how to do joins on Firebase tables

I am trying to get data from two tables like (fetch all users and their details) tableOne.on('users', ... in Firebase? Any help is apreciated See Question&Answers more detail:os...

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

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Preserving entity references when transforming XML with XSLT?

How can I preserve entity references when transforming XML with XSLT (2.0)? With all of the processors I've tried, ... 'm using Saxon 9. Thanks! See Question&Answers more detail:os...

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

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java - How to convert date time from one time zone to another time zone

The records are getting saved according to time zone of US but if I want to show the same record back to user ... time with user's Time Zone See Question&Answers more detail:os...

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

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java - How to combine date and time into a single object?

my dao page is receiving date and time from two different field now i want know how to merge these both date ... ; System.out.println(dateTime); See Question&Answers more detail:os...

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

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php - Is mysqli_real_escape_string safe?

I′m new in PHP and I′ve realised that my database connection, using a php form (with user and pass ... of how to use mysqli_real_escape_string? See Question&Answers more detail:os...

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

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rust - Simultaneous mutable access to arbitrary indices of a large vector that are guaranteed to be disjoint

Context I have a case where multiple threads must update objects stored in a shared vector. However, the ... the size of indices_to_update. See Question&Answers more detail:os...

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

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g++ - What is the VTable Layout and VTable Pointer Location in C++ Objects in GCC 3.x and 4.x?

I am looking for details of the VTable structure, order and contents, and the location of the vtable pointers ... ABI layout documents are here. See Question&Answers more detail:os...

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

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c++ - Conditional operator used in cout statement

By trying, I came to know that it is necessary to put parentheses around a conditional operator in a cout statement. ... both cases, isn't it? See Question&Answers more detail:os...

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

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XML Schema that allows anything (xsd:any)

I need an example of XML schema that will allow anything and everything. It might sound weird like this, but I ... that obviously didn't work. See Question&Answers more detail:os...

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

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android - How to resolve the error "No resource found that matches the given name" when adding library v7 AppCompat in Eclipse?

I have a project target to API Level 10 and i want to implement the new ActionBar support library. After ... secrets of the Android development. See Question&Answers more detail:os...

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

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php - Is it a good idea to use $_SERVER['DOCUMENT_ROOT'] in includes?

Is this, for example, a good idea? require_once($_SERVER['DOCUMENT_ROOT'].'/include.php'); If you have two ... in general what could go wrong? See Question&Answers more detail:os...

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

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pointers - How to check if two variables point to the same object in memory?

For example: struct Foo<'a> { bar: &'a str } fn main() { let foo_instance = Foo { bar: "bar" }; let ... in the memory Is it possible to do that? See Question&Answers more detail:os...

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

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php - Get coupon data from WooCommerce orders

I have created in WooCommerce two custom coupon types: function custom_discount_type( $discount_types ) { $discount_types[' ... amount?. Thanks See Question&Answers more detail:os...

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

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javascript - Lodash remove items recursively

Given this JSON object, how does lodash remove the reach value from the objects? { total: 350, SN1: { ... actual problem. Can anyone help? See Question&Answers more detail:os...

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

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neo4j - What does a comma in a Cypher query do?

A co-worker coded something like this: match (a)-[r]->(b), (c) set c.x=y What does the comma do? Is it just shorthand for MATCH? See Question&Answers more detail:os...

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

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java - Sending non-ASCII text in HTTP POST header

I am sending a file to a server as an octet-stream, and I need to specify the filename in the header: ... way to get around this limitation? See Question&Answers more detail:os...

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

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memory - How garbage values are assigned to variables in c

C code : int a; printf(" %d",a); // It'll print some garbage value; So how does these garbage values are ... value of 'a'? or something else? See Question&Answers more detail:os...

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

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905 views

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c# - How to recursively populate a TreeView with JSON data

I have a winforms treeview, I can read data automatically, (a node that is equal to key, and a node ... help? (Sorry for language mistakes) See Question&Answers more detail:os...

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

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rust - How can I modify self in a closure called from a member function?

I am trying to calculate legal chess moves and am having problems satisfying the borrow checker. I have a struct ... so the code can compile? See Question&Answers more detail:os...

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

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Session lost after page redirect in php

When I use php header redirection all session variables are lost... Some people say that adding exit(); just after ... else { echo 'error'; } See Question&Answers more detail:os...

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

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python - Scikit Learn OneHotEncoder fit and transform Error: ValueError: X has different shape than during fitting

Below is my code. I know why the error is occurring during transform. It is because of the feature list mismatch ... . Expected 10, got 4. See Question&Answers more detail:os...

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

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java - How to display Arabic in PDF created using iText

I need your help in display the Arabic content and to start the writing from right to left in the PDF sample that ... So how can I solve this? See Question&Answers more detail:os...

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

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java - JFreeChart - Problem in creating moving chart

I am using JFreeChart in my java application. Problem I want to plot a XYAreaChart whose domain axis (x-axis) ... want the scrolling x-axis. See Question&Answers more detail:os...

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

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Javafx : How can I produce an animation with 3D path?

I'm new to JavaFX, and I encountered a problem when trying to deal with animation. I know class ... Any advice would be appreciated. See Question&Answers more detail:os...

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

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257 views

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sql - How to select records with maximum values in two columns?

It was hard to come up with an understandable title for this question. I'll try to explain with an example. ... How should such query look like? See Question&Answers more detail:os...

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

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311 views

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Separating multiple if conditions with commas in Swift

We already know multiple optional bindings can be used in a single if/guard statement by separating them ... are they technically different? See Question&Answers more detail:os...

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

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552 views

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c# - How to stop self-referencing loop in .Net Core Web API?

I'm having some issues which I'm guessing are related to self-referencing using .NET Core Web API and Entity ... way to handle this issue? See Question&Answers more detail:os...

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

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347 views

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node.js - How to close electron app via javascript?

I am running an express app via electron. Below is the main.js const electron = require("electron"), app = electron.app, ... { app.quit(); } }); See Question&Answers more detail:os...

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

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