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spark dataframe drop duplicates and keep first

Question: in pandas when dropping duplicates you can specify which columns to keep. Is there an equivalent in ... /questions/38687212/spark-dataframe-drop-duplicates-and-keep-first...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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309 views

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Add zeros to a float after the decimal point in Python

I am reading in data from a file, modify it and write it to another file. The new file will be read by another ... /15619096/add-zeros-to-a-float-after-the-decimal-point-in-python...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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203 views

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How to set any font in reportlab Canvas in python?

I'm using reportlab to create pdfs. When I try to set a font using the following method, I get a KeyError: ... /questions/4899885/how-to-set-any-font-in-reportlab-canvas-in-python...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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200 views

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c# - What is the difference between Contains and Any in LINQ?

What is the difference between Contains and Any in LINQ? question from:https://stackoverflow.com/questions/23526773/what-is-the-difference-between-contains-and-any-in-linq...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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481 views

1 answer

postgresql - Postgres - testing database connection in bash

I wonder if there is an alternative to the psql command to test the connection to a postgresql database ... .com/questions/26911508/postgres-testing-database-connection-in-bash...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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279 views

1 answer

PhpStorm saving with Linux line ending on Windows

Environment: Windows + PhpStorm Issue: PhpStorm saves file with Windows line endings - and for shell script it ... /40470895/phpstorm-saving-with-linux-line-ending-on-windows...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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501 views

1 answer

Android Studio I keep getting Gradle error "The process cannot access the file because it is being used by another process"

I can import a sample app project, try to build it and I keep getting this error. Not always the same file but ... -i-keep-getting-gradle-error-the-process-cannot-access-the-file-b...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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398 views

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javascript - Material UI Select Component- A component is changing a controlled input of type text to be uncontrolled

I am trying to change the value of Select input and then i am getting the following warning in the console. ... select-component-a-component-is-changing-a-controlled-input-of-type...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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201 views

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python - Pandas: Multilevel column names

pandas has support for multi-level column names: >>> x = pd.DataFrame({'instance':['first','first ... :https://stackoverflow.com/questions/21443963/pandas-multilevel-column-names...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Easiest way to cause a memory leak in Java

(This question already has answers here): question from:https://stackoverflow.com/questions/4948529/easiest-way-to-cause-a-memory-leak-in-java...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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944 views

1 answer

datatables - Change the default number of rows to display on one "page"

How can I specify the number of rows to display on a single "page" when using DataTables's pagination feature? ... /change-the-default-number-of-rows-to-display-on-one-page...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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325 views

1 answer

go - Insert a value in a slice at a given index

Given array1 := []int{1, 3, 4, 5} array2 := []int{2, 4, 6, 8} I want to insert array2[2] i.e ... ://stackoverflow.com/questions/46128016/insert-a-value-in-a-slice-at-a-given-index...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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591 views

1 answer

javascript - How to get the text input field value to a const and log that value in Cypress.io

How to get the text input field value to a 'const' variable in Cypress, so that I can log that variable using cy. ... input-field-value-to-a-const-and-log-that-value-in-cypress-i...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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819 views

1 answer

api - Can't create pdf using python PDFKIT Error : " No wkhtmltopdf executable found:"

I tried installing pdfkit Python API in my windows 8 machine. I'm getting issues related to path. Traceback ... create-pdf-using-python-pdfkit-error-no-wkhtmltopdf-executable-found...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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421 views

1 answer

math - C: How to wrap a float to the interval [-pi, pi)

I'm looking for some nice C code that will accomplish effectively: while (deltaPhase >= M_PI) deltaPhase -= M_TWOPI; while ( ... 4633177/c-how-to-wrap-a-float-to-the-interval-pi-pi...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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149 views

1 answer

How can I initialize an Array inside a Hash in Ruby

(This question already has answers here): question from:https://stackoverflow.com/questions/4410076/how-can-i-initialize-an-array-inside-a-hash-in-ruby...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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160 views

1 answer

c# - Incorrect stacktrace by rethrow

I rethrow an exception with "throw;", but the stacktrace is incorrect: static void Main(string[] ... https://stackoverflow.com/questions/4217616/incorrect-stacktrace-by-rethrow...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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197 views

1 answer

jQuery call function after load

Need to call a filter function on some options based on a radio selected (Link here), How can I call ... https://stackoverflow.com/questions/890090/jquery-call-function-after-load...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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139 views

1 answer

ios - UIAlertController text alignment

Is there a way to change the alignment of the message displayed inside a UIAlertController on iOS ... https://stackoverflow.com/questions/25962559/uialertcontroller-text-alignment...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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137 views

1 answer

Multiple Module in Angularjs

Is it possible to create multiple module in an Angular Script? I went through the documentation and learned ... ://stackoverflow.com/questions/18512434/multiple-module-in-angularjs...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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152 views

1 answer

javascript - Selecting a JSON object with a colon in the key

I'm using a third party tool that POSTs a JSON response. It works great, but one of the keys I need to use ... com/questions/4925760/selecting-a-json-object-with-a-colon-in-the-key...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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94 views

1 answer

javascript - Issue with window.close and chrome

I'm trying to close a child window with JavaScript, and in Firefox everything works fine but in Chrome ... /stackoverflow.com/questions/2032640/issue-with-window-close-and-chrome...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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158 views

1 answer

jquery - What type of DOM Element?

e.g. if i have this: <div id='mydiv'>whatever</div> then let say in jQuery, how can I find out ... from:https://stackoverflow.com/questions/6114683/what-type-of-dom-element...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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520 views

1 answer

ios - How can I use edgesIgnoringSafeArea in SwiftUI, but make a child view respect the safe area?

I'm building a UI is SwiftUI with a list view, and I want to put a panel over part of the list view ... can-i-use-edgesignoringsafearea-in-swiftui-but-make-a-child-view-respect-th...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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339 views

1 answer

collecting HashMap<String, List<String>> java 8

I want to be able to convert a List to a HashMap where the key is the elementName and the ... ://stackoverflow.com/questions/24917053/collecting-hashmapstring-liststring-java-8...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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204 views

1 answer

android - How can I have my AppBar in a separate file in Flutter while still having the Widgets show?

I am currently building a Flutter app that recommends restaurants around the area. However, I've gotten myself in quite ... in-a-separate-file-in-flutter-while-still-having-the-wi...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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269 views

1 answer

Rails action caching with querystring parameters

How can I cache my REST controller with Rails where my actions have query string parameters? Example: ... .com/questions/1988658/rails-action-caching-with-querystring-parameters...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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109 views

1 answer

Why does jsx code formatting not correctly

vscode is my favorite editor, I have a code formatting problem with it. Here is my jsx code: return ... .com/questions/42920590/why-does-jsx-code-formatting-not-correctly...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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