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python - How do you find the first key in a dictionary?

I am trying to get my program to print out "banana" from the dictionary. What would be the simplest way to do this? This ... : 1.5, "pear" : 3 } 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 - Prepend a level to a pandas MultiIndex

I have a DataFrame with a MultiIndex created after some grouping: import numpy as np import pandas as pd from numpy. ... # a3 b4 -0.002009 See Question&Answers more detail:os...

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

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Do while loop in SQL Server 2008

Is there any method for implement do while loop in SQL server 2008? See Question&Answers more detail:os...

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

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networking - What is the cost of many TIME_WAIT on the server side?

Let's assume there is a client that makes a lot of short-living connections to a server. If the client closes ... , just nothing to worry about? See Question&Answers more detail:os...

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

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Fitting a histogram with python

I have a histogram H=hist(my_data,bins=my_bin,histtype='step',color='r') I can see that the shape is almost ... I get. Can you help me? 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# - Weak event handler model for use with lambdas

OK, so this is more of an answer than a question, but after asking this question, and pulling together the various ... , this answer is for you. See Question&Answers more detail:os...

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

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iphone - How can I create a custom "pin-drop" animation using MKAnnotationView?

I have an instance of MKMapView and would like to use custom annotation icons instead of the standard pin icons ... that'd be great too. 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# - What are best practices for using SmtpClient, SendAsync and Dispose under .NET 4.0

I'm a bit perplexed on how to manage SmtpClient now that it is disposable, especially if I make calls using ... Gmail is used as the mailer. See Question&Answers more detail:os...

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

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html - CSS absolute position won't work with margin-left:auto margin-right: auto

Say you have the following CSS applied to a div tag .divtagABS { position: absolute; margin-left: auto; ... absolute position does not 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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javascript - Multiple transparent textures on the same mesh face in Three.js

Is it possible to lay multiple textures on top of each other on the same face in Three.js so that the alpha ... (as is the below image). See Question&Answers more detail:os...

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

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jar - java.lang.NoClassDefFoundError: Could not initialize class XXX

public class PropHolder { public static Properties prop; static { //code for loading properties from file } } // ... What could be the problem? See Question&Answers more detail:os...

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

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bash - Sort a text file by line length including spaces

I have a CSV file that looks like this AS2345,ASDF1232, Mr. Plain Example, 110 Binary ave.,Atlantis,RI,12345,(999)123- ... '{$1=""; print $0}' See Question&Answers more detail:os...

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

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amazon web services - What is the best way to pass AWS credentials to a Docker container?

I am running docker-container on Amazon EC2. Currently I have added AWS Credentials to Dockerfile. Could you please let ... best way to do 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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multithreading - Thread local storage in Python

How do I use thread local storage in Python? Related What is thread local storage in Python, and why ... Alex Martelli gives a nice solution 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# - .NET TimeZoneInfo from Olson time zone

How can I convert the following into a System.TimeZone or System.TimeZoneInfo? { "timeZone": "America/Los_Angeles ... a C# TimeZoneInfo object. See Question&Answers more detail:os...

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

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linker - Use both static and dynamically linked libraries in gcc

I need to distribute a binary that will run on as many x86 Linux distributions as possible. That means that I ... link any libraries at all. See Question&Answers more detail:os...

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

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accessibility api - Android: How do you check if a particular AccessibilityService is enabled

I've written an Android app that requires the use of the AccessibilityService. I know how to check to see if ... are enabled on the device? See Question&Answers more detail:os...

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

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syntax - Python: One Try Multiple Except

In Python, is it possible to have multiple except statements for one try statement? Such as : try: ... xyz except ExceptionType2: #return abc 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 - Understanding RecyclerView setHasFixedSize

I'm having some trouble understanding setHasFixedSize(). I know that it is used for optimization when the size ... grows with the content? 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 - What is the difference between HashRouter and BrowserRouter in React?

I am new to programming which makes things slightly difficult for me to understand if I read the official docs. ... url to render the component? 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 - Check if value already exists within list of dictionaries?

I've got a Python list of dictionaries, as follows: a = [ {'main_color': 'red', 'second_color':'blue'}, {' ... list already? // if not: add item 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 - How to import and export components using React + ES6 + webpack?

I'm playing around with React and ES6 using babel and webpack. I want to build several components in ... import and export my components? See Question&Answers more detail:os...

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

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Can Android do peer-to-peer ad-hoc networking?

Is it possible to set up Android in ad-hoc peer-to-peer wifi mode? For example, I would like to have ... since bluetooth range is more limited. See Question&Answers more detail:os...

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

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Download and save PDF file with Python requests module

I am trying to download a PDF file from a website and save it to disk. My attempts either fail with encoding errors ... seem to get it to 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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c++ - static variables in an inlined function

I have a function that is declared and defined in a header file. This is a problem all by itself. When that ... copies do I end up with? See Question&Answers more detail:os...

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

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Magento products will not show in category

I've recently been tasked with the build and deployment of a large Ecommerce site. In the past we've had ... what could possibly be wrong 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++ - Is it possible to use std::string in a constexpr?

Using C++11, Ubuntu 14.04, GCC default toolchain. This code fails: constexpr std::string constString = " ... character string in a constexpr? See Question&Answers more detail:os...

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

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node.js - Where is body in a nodejs http.get response?

I'm reading the docs at http://nodejs.org/docs/v0.4.0/api/http.html#http.request, but for some reason, I can ... it. Where is the body hiding? See Question&Answers more detail:os...

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

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