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git - How do .gitignore exclusion rules actually work?

I'm trying to solve a gitignore problem on a large directory structure, but to simplify my question I have reduced it ... /bash3 and git-1.7.1 on Ubuntu/bash3. Question&Answers:os...

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

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601 views

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c# - How to flatten nested objects with linq expression

I am trying to flatten nested objects like this: public class Book { public string Name { get; set; } public ... ve been told that a SelectMany would be enough. Question&Answers:os...

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

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350 views

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c# - Cannot set some HTTP headers when using System.Net.WebRequest

When I try to add a HTTP header key/value pair on a WebRequest object, I get the following exception: This ... headers with a request for a remote resource. Question&Answers:os...

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

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.net - HashSet<T> versus Dictionary<K, V> w.r.t searching time to find if an item exists

HashSet<T> t = new HashSet<T>(); // add 10 million items Dictionary<K, V> t = new Dictionary<K, V>( ... they exist in the data structure. I will NEVER iterate. Question&Answers:os...

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

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c++11 - C++ Modules - why were they removed from C++0x? Will they be back later on?

I just discovered this old C++0x draft about modules in C++0x. The idea was to get out of the current .h/. ... working on it for an ulterior version of C++? Question&Answers:os...

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

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What does the dot prefix in the cookie domain mean?

What is the difference between local.test.com and .local.test.com ? The screenshot is from Chrome. Question&Answers:os...

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

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android - CardView Corner Radius

Is there a way to make CardView only have corner radius at the top? <android.support.v7.widget. ... layout_height="wrap_content" app:cardCornerRadius="10dp" > Question&Answers:os...

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

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Reuse spring application context across junit test classes

We've a bunch of JUnit test cases (Integration tests) and they are logically grouped into different test classes. We ... .5 and use Maven to build the project. Question&Answers:os...

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

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SQLite Android Database Cursor window allocation of 2048 kb failed

I have a routine that runs different queries against an SQLite database many times per second. After a while ... same CursorWindow everytime I get new data. Question&Answers:os...

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

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Best practice for defining button events in android

I have a Layout defined in XML which consists of several Buttons. Currently I am doing this in the OnCreate ... event nothing happens when I click the button. Question&Answers:os...

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

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android - MonoDroid: Error when calling constructor of custom view - TwoDScrollView

I am building an Android application that uses the custom-built TwoDScrollView found here: http://blog.gorges.us/2010 ... rewritten in C#. Thanks for any help! Question&Answers:os...

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

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Customizing Mathematica shortcuts

Is there a place I can view/change global shortcut options like Command + 9 (turn into Input style)? In ... context menu which doesn't have its own shortcut. Question&Answers:os...

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

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326 views

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javascript - How can you sort an array without mutating the original array?

Let's suppose I wanted a sort function that returns a sorted copy of the inputted array. I naively tried this ... every element of the array into a new one? Question&Answers:os...

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

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sql - MySQL Workbench: How to keep the connection alive

Error Code: 2013. Lost connection to MySQL server during query I am using MySQL Workbench. Also, I am ... , without stopping and without losing the connection? Question&Answers:os...

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

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c++ - Why include guards do not prevent multiple function definitions?

This question already has answers here: Question&Answers:os...

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

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275 views

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android - How to set default app launcher programmatically?

I am creating a launcher (kiosk) app that will be downloadable through google. When first installing this ... app launcher programmatically. Thanks in advance! Question&Answers:os...

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

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c++ - Is the memory allocated for struct members continguous? What if a struct member is an array?

In C/C++ suppose I define a simple struct named test as follows. struct test { double height; int age; ... look like? A picture would be really helpful. Question&Answers:os...

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

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229 views

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Simulate Python keypresses for controlling a game

I'm trying to control a game (my two test games are Half Life 2 and Minecraft) using my Kinect and Python. ... work and what the correct way to do this is? Question&Answers:os...

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

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62 views

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How to disable the back button in the browser using JavaScript

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

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190 views

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jquery - Adding data attribute to DOM

$('div').data('info', 1); alert($('div').data('info')); //this works $('div[data-info="1"]').text ... , using $('div[data-example="example"]').html() jsfiddle Question&Answers:os...

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

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conda - anaconda - graphviz - can't import after installation

Just installed a package through anaconda (conda install graphviz), but ipython wouldn't find it. I ... 's nothing in: C:UsersusernameAnacondaLibsite-packages Question&Answers:os...

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

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133 views

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java - How to select and crop an image in android?

Hey, I am currently working on a live wallpaper and I allow the user to select an image which will go behind my ... how I can fix this? Thanks, for your time. Question&Answers:os...

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

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531 views

1 answer

Django ManyToMany filter()

I have a model: class Zone(models.Model): name = models.CharField(max_length=128) users = models.ManyToManyField( ... be simple but my brain isn't cooperating! Question&Answers:os...

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

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215 views

1 answer

oop - Java `final` method: what does it promise?

In a Java class a method can be defined to be final, to mark that this method may not be overridden: public ... kind of "contract" does a final method promise? Question&Answers:os...

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

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614 views

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c# - What does |= (single pipe equal) and &=(single ampersand equal) mean

In below lines: //Folder.Attributes = FileAttributes.Directory | FileAttributes.Hidden | FileAttributes.System | ... attribute with keeping the others... Question&Answers:os...

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

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191 views

1 answer

Matplotlib connect scatterplot points with line - Python

I have two lists, dates and values. I want to plot them using matplotlib. The following creates a scatter plot of my ... the points. How do I do this in python? Question&Answers:os...

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

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287 views

1 answer

Are nested transactions allowed in MySQL?

Does MySQL allow the use of nested transactions? Question&Answers:os...

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

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1.1k views

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gcc - long long int vs. long int vs. int64_t in C++

I experienced some odd behavior while using C++ type traits and have narrowed my problem down to this quirky little ... me to repeat code all over the place. Question&Answers:os...

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

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