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Android app enable NFC only for one Activity

Is it possible to enable NFC for only one activity in android for an NFC enabled application? I've read this, ... > </application> </manifest> 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 - BeautifulSoup returns empty list when searching by compound class names

BeautifulSoup returns empty list when searching by compound class names using regex. Example: import re from bs4 import ... precise. Any ideas? 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 - variable access outside of if statement

I am trying to access variable outside an if statement in java. The variable is axeMinDmg. Here is what i have but ... ; } // close if statement See Question&Answers more detail:os...

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

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.net - Is there a regex flavor that allows me to count the number of repetitions matched by the * and + operators?

Is there a regex flavor that allows me to count the number of repetitions matched by the * and + operators ... possible under the .NET Platform. See Question&Answers more detail:os...

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

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Aggregate data in R

I'm looking for a dead simple example on how to use aggregate and calculate means in R. Say, I have the ... this, cast() or aggregate()? 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 - PyOpenGL how do I import an obj file?

import pygame import OpenGL from pygame.locals import * from OpenGL.GL import * from OpenGL.GLU import * import ... models into a game 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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multithreading - clock function in C++ with threads

There is a really interesting note here: http://en.cppreference.com/w/cpp/chrono/c/clock "Only the difference ... in 3 seconds of runtime). See Question&Answers more detail:os...

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

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dynamic xpath in xslt?

I have follwing set of files: SourceFile.xml: <?xml version="1.0" encoding="utf-8" ?> <Employees> < ... the same will be highly 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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swift3 - Trigger notification weekly Swift 3

I am trying to make a schedule, in which I need to remember all the weeks I have class such as Monday ... , content: content, trigger: trigger) See Question&Answers more detail:os...

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

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reactjs - Add element to a state React

I already have a state with this: this.setState({ conversation: ( <div> {conversation.map(element => { if ( ... to set a new state from zero See Question&Answers more detail:os...

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

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900 views

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postgresql - Buffers (Circle) in PostGIS

I have to extend the normal GeoJSON format to add some unsopported polygon like Circle. { "type": "Circle", ... that solution doesn't works. See Question&Answers more detail:os...

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

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Matlab vs C++ Double Precision

I am porting some code from Matlab to C++. In Matlab format long D = 0.689655172413793 (this is 1 ... calculations are done in double precision. 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 - Re.match() returns always none

I feel kind of stupid but it does not work: import re a = " ebrj wjrbw erjwek wekjb rjERJK ABB RAEJKE BWE ... None as the result of the 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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IntelliJ IDEA: "cannot resolve symbol" for String, System and other Java classes

I recently downloaded IntelliJ IDEA to a different computer. On one computer it works fine on the other computer it is ... but it didn't 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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c++ - Class vs Struct for data only?

Is there any advantage over using a class over a struct in cases such as these? (note: it will only hold ... a struct instead of a class? 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 - Chaining "is" operators

Does python support chaining is operators, such as the following? a = None b = None a is b is None This ... some doc references would be nice. 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 - How To bind data using TypeScript Controller & Angular Js

I am Playing around with Type Script.I have convert my angular js controller to Type Script But i m facing ... $http, private $templateCache ){} See Question&Answers more detail:os...

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

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487 views

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vectorization - pdist2 equivalent in MATLAB version 7

I need to calculate the euclidean distance between 2 matrices in matlab. Currently I am using bsxfun and ... Any help. Regards, Bhavya See Question&Answers more detail:os...

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

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selenium - Is it Firefox or Geckodriver, which creates "rust_mozprofile" directory

Whenever we invoke Firefox, under '/tmp' directory rust_mozprofile directories are getting created. As Firefox internally ... if there is any. See Question&Answers more detail:os...

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

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singleton - How to avoid multiple instances of windows form in c#

How to avoid multiple instances of windows form in c# ?? i want only one instance of the form running. ... many pages of my application. See Question&Answers more detail:os...

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

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498 views

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reactjs - getting error: Cannot read property state of undefined

import React, { Component } from "react"; import FormUpdate from "../components/formUpdate"; import { fetchClothingItem, ... </div> ); } } See Question&Answers more detail:os...

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

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250 views

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Java String Concatenation with + operator

I got confused with the String concatenation. String s1 = 20 + 30 + "abc" + (10 + 10); String s2 = 20 ... how the String operator + works 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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dart - Null aware function invocation operator

In the same way we can have nullableClassInstance?.method(blah) Is there a way to do nullableFunctionInstance?(blah) ... all in one line? See Question&Answers more detail:os...

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

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Is it possible to run multiple DDL statements inside a transaction (within SQL Server)?

I'm wondering if it is possible to run multiple DDL statements inside a transaction. I'm specially interested on SQL ... JDBC driver. b.r. Touko 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 - gcc failing to warn of uninitialized variable

The following code has a variable that may be uninitialized. It seems that gcc should be generating a ... report the uninitialized variable? See Question&Answers more detail:os...

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

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658 views

1 answer

oop - Java method overloading + double dispatch

Can anybody explain in detail the reason the overloaded method print(Parent parent) is invoked when working with Child ... .doJob(worker); } } See Question&Answers more detail:os...

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

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561 views

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php - How to implement Content-Disposition: attachment?

I am trying to make it so that mp3's on my site are downloaded by left clicking instead of having to right click and ... .png"/></a> </div> See Question&Answers more detail:os...

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

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compiler construction - What are C# lambda's compiled into? A stackframe, an instance of an anonymous type, or?

What are C# lambda's compiled into? A stackframe, an instance of an anonymous type, or? I've read this ... resulting outputs from the 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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