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python - Check for duplicate values in Pandas dataframe column

Is there a way in pandas to check if a dataframe column has duplicate values, without actually dropping ... /50242968/check-for-duplicate-values-in-pandas-dataframe-column...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Access Control Origin Header error using Axios in React Web throwing error in Chrome

Im making an API call using Axios in a React Web app. However Im getting the error in Chrome as, XMLHttpRequest ... -header-error-using-axios-in-react-web-throwing-error-in-ch...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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php - Returning an Eloquent model as JSON in Laravel 4

How do you return an Eloquent model to the browser as JSON? What is the difference between the two methods ... questions/15602129/returning-an-eloquent-model-as-json-in-laravel-4...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - Is it possible to initialize slice with specific values?

Is it possible to initialize an slice with all 1's like in python? PYTHON: onesArray = np.ones(5) ... /questions/39984957/is-it-possible-to-initialize-slice-with-specific-values...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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What's the difference between "deletemany" and "remove" in mongodb?

What's the difference between the two commands here? db.collection.deleteMany({condition}) db.collection.remove({ ... /whats-the-difference-between-deletemany-and-remove-in-mongodb...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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spring - Getting java.lang.ClassNotFoundException: javax.servlet.ServletContext in JUnit

I'm using Sping MVC in my application and writing JUnit test cases for a DAO. When I run ... 19690267/getting-java-lang-classnotfoundexception-javax-servlet-servletcontext-in-junit...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Using Cython To Link Python To A Shared Library

I am trying to integrate a third party library written in C with my python application using Cython. I have ... questions/16993927/using-cython-to-link-python-to-a-shared-library...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - Why do I need to use foreign key if I can use WHERE?

A beginners' question about foreign key in MySQL. In w3school it says, A FOREIGN KEY in one table points to a PRIMARY KEY in ... why-do-i-need-to-use-foreign-key-if-i-can-use-where...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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nosql - Is MongoDB reliable?

question from:https://stackoverflow.com/questions/3505141/is-mongodb-reliable...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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android - how to get text from textview

if I have set text in textview in such way, which is not problem: tv.setText("" + ANS[i]); this ... :https://stackoverflow.com/questions/8517730/how-to-get-text-from-textview...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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immutability - Which types are mutable and immutable in the Google Go Language?

In Google Go, I read that Strings are immutable, ok but are int's? What about other types? As a slightly ... 8018081/which-types-are-mutable-and-immutable-in-the-google-go-language...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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exception - Java: Meaning of catch (final SomeException e)?

What does final do in the following Java expression? catch (final SomeExceptionType e) question from:https:// ... com/questions/3516816/java-meaning-of-catch-final-someexception-e...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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android - Job Scheduler vs Background Service

I have an app which has a feature A which should run in background every minute. Feature A is that ... ://stackoverflow.com/questions/42963494/job-scheduler-vs-background-service...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ubuntu - Docker apt-get update fails

Can somebody help me get apt-get working in my docker container? Whenever I try running any apt-get command ... ://stackoverflow.com/questions/24832972/docker-apt-get-update-fails...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Java Interface Usage Guidelines -- Are getters and setters in an interface bad?

What do people think of the best guidelines to use in an interface? What should and shouldn't go into an ... interface-usage-guidelines-are-getters-and-setters-in-an-interface-bad...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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SQL Server Express connection string for Entity Framework Code First

I am working in Visual Web Developer 2010 Express, and using the Entity Framework code-first CTP. I am ... /sql-server-express-connection-string-for-entity-framework-code-first...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Pandas filling missing dates and values within group

I've a data frame that looks like the following x = pd.DataFrame({'user': ['a','a','b' ... stackoverflow.com/questions/44978196/pandas-filling-missing-dates-and-values-within-group...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - An attribute argument must be a constant expression, ...- Create an attribute of type array

Here is my custom attribute and a class I'm using it on: [MethodAttribute(new []{new MethodAttributeMembers(), ... -argument-must-be-a-constant-expression-create-an-attribute-of...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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web - How long does it take for Google Analytics Goals to start show some data?

I am testing Google Analytics Goals but I am not sure if I have it setup correctly. I setup a basic 3 step goal ... -does-it-take-for-google-analytics-goals-to-start-show-some-data...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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How to run groovy script in java?

I have a groovy script and i want to execute it in java. Could someone provide me with further documentation ... .com/questions/17790198/how-to-run-groovy-script-in-java...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Detect "Ubuntu on Windows" vs native Ubuntu from bash script

(This question already has answers here): question from:https://stackoverflow.com/questions/38859145/detect-ubuntu-on-windows-vs-native-ubuntu-from-bash-script...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Why doesn't encodeURIComponent encode single quotes/apostrophes?

The escape() function, was deprecated and replaced by encodeURIComponent but encodeURIComponent doesn't ... 18251399/why-doesnt-encodeuricomponent-encode-single-quotes-apostrophes...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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How can I find out who force pushed in git?

Someone used git push --force but I can't tell who did it from the logs. Is there a way to identify the ... com/questions/15028246/how-can-i-find-out-who-force-pushed-in-git...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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haskell - Is there any chance to write "C major" instead of "major C"?

I encountered a small aesthetic issue in my music project and it has been bugging me for some time. I have a type data ... /is-there-any-chance-to-write-c-major-instead-of-major-c...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How to read a column of csv as dtype list using pandas?

I have a csv file with 3 columns, wherein each row of Column 3 has list of values in it. As you can see from ... /32742976/how-to-read-a-column-of-csv-as-dtype-list-using-pandas...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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branch - How do I use Git's interactive rebase with a local-only repository (no remote / origin)?

I use git as a local source control system mostly for history and diff tracking. I still want to use rebase ... -use-gits-interactive-rebase-with-a-local-only-repository-no-remote...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Markdown Implementations for C/C++

(Closed). This question is opinion-based. It is not currently accepting answers. question from:https://stackoverflow.com/questions/889434/markdown-implementations-for-c-c...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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android - Expand ListView item with animation

I have a ListView. Initially, the ListView contains some data. When the user clicks on an item, ... //stackoverflow.com/questions/12729830/expand-listview-item-with-animation...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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