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html - Preventing Canvas Clear when Resizing Window

I'm trying to create a simple app that draws rectangles within the Canvas tag. I've got the Canvas resizing to fullscreen ... canvas; } }; })(); See Question&Answers more detail:os...

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runtime - Prevent launching multiple instances of a java application

I want to prevent the user from running my java application multiple times in parallel. To prevent this, I have ... other mechanism could I use? See Question&Answers more detail:os...

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

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angularjs - Good way to dynamically open / close a popover (or tooltip) using angular, based on expression?

I have a form that is wired into angular, using it for validation. I am able to display error messages using ... '#popover_id').popover('show'). 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 - Scanner is never closed

I'm working on a game and I came across a little problem with my scanner. I'm getting a resource leak scanner never ... +" player(s)."); } } See Question&Answers more detail:os...

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

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common lisp - What's the canonical way to join strings in a list?

I want to convert ("USERID=XYZ" "USERPWD=123") to "USERID=XYZ&USERPWD=123". I tried (apply #'concatenate 'string '( ... ~A~A" delim element))))) See Question&Answers more detail:os...

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c# - MVC HTML Helpers and Lambda Expressions

I understand Lambda queries for the most part, but when I am trying to learn MVC, and I see the default ... can make a MVC newbie better! See Question&Answers more detail:os...

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Python 3.6 No module named pip

I have just installed Python 3.6 on Fedora 25 (64 bits) by running dnf install python36 and I can't use any ... .4 and 3.5 working just fine See Question&Answers more detail:os...

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hibernate - Convert list in entity to single string column in database

I have a VARCHAR field in my database, and the value of this field is val1,val2,val3. Is it possible ... entity using comma as split delimiter? See Question&Answers more detail:os...

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Open PDF file on the fly from a Java application

Is there any way to have a code that opens a PDF file in Java application in a platform independant way? I mean ... open PDF files on the fly? See Question&Answers more detail:os...

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scala parallel collections degree of parallelism

Is there any equivalent in scala parallel collections to LINQ's withDegreeOfParallelism which sets the number of ... of threads running. See Question&Answers more detail:os...

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c++ - Legal to overwrite std::string's null terminator?

In C++11, we know that std::string is guaranteed to be both contiguous and null-terminated (or more ... -terminator with a null character? See Question&Answers more detail:os...

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c# - What is the difference between a Session and a Cookie?

What is the difference between a Session and a Cookie? What circumstances should each be used? See Question&Answers more detail:os...

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Android Camera in Portrait on SurfaceView

I tried several things to try to get the camera preview to show up in portrait on a SurfaceView. Nothing ... the client? Thanks, Prasanna See Question&Answers more detail:os...

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multithreading - Python creating a shared variable between threads

I'm working on a project in Python using the "thread" module. How can I make a global variable (in my case I ... project (about 4-6) can access? See Question&Answers more detail:os...

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Do Python regular expressions have an equivalent to Ruby's atomic grouping?

Ruby's regular expressions have a feature called atomic grouping (?>regexp), described here, is there any equivalent in Python's re module? 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 - Parse a Pandas column to Datetime when importing table from SQL database and filtering rows by date

I have a DataFrame with column named date. How can we convert/parse the 'date' column to a DateTime object? ... Is it already a datetime object? See Question&Answers more detail:os...

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utf 8 - Show UTF-8 text properly in Gradle

I have a task: task info<<{ println "Gradle - система автоматической сборки, построенная на принципах Apache Ant и ... How to fix it? Thanks. See Question&Answers more detail:os...

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node.js - Connect or Express middleware to modify the response.body

I would like to have a middleware function which modifies the response body. This is for an express ... documentation would be appreciate. 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 - Vue components communication

I have two Vue components: Vue.component('A', {}); Vue.component('B', {}); How can I access ... the communication work between the components? See Question&Answers more detail:os...

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debugging - How do I debug a WordPress plugin?

I've recently inherited a WordPress plugin that has a few bugs in it. My problem is that I'm also new to ... a popup or log to a console. See Question&Answers more detail:os...

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javascript - jQuery .focusout / .click conflict

I'm working on a project with an autocomplete searchbox. Now I have the issue that I want to pass the value from ... ">hello world</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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"unpacking" a passed dictionary into the function's name space in Python?

In the work I do, I often have parameters that I need to group into subsets for convenience: d1 = {'x' ... ? Maybe something using eval? Thanks! See Question&Answers more detail:os...

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Manually Downloading and Installing Packages in R

I am currently trying to run some R code on a computing cluster but cannot run the install.packages function ... the cluster are Unix x86_64. See Question&Answers more detail:os...

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

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Suggestions for implementing audit tables in SQL Server?

One simple method I've used in the past is basically just creating a second table whose structure mirrors the ... and easily reported on. 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 requests with multithreading

I've been trying to build a scraper with multithreading functionality past two days. Somehow I still couldn't manage ... = Test() test.async() See Question&Answers more detail:os...

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.net - WPF, 'Object reference not set to an instance of an object' in Designer

I'm getting an "Object reference not set to an instance of an object" error when I try to reload the ... the "Object reference" error. O_o 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 - Seaborn - change bar colour according to hue name

I'm using seaborn and pandas to create some bar plots from different (but related) data. The two datasets share a ... both graphs (e.g. black) See Question&Answers more detail:os...

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

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arrays - How to convert a byte[] to a BufferedImage in Java?

I'm posting this thread because I have some difficulties to deal with pictures in Java. I would like to be able ... )... Could someone 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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