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asked Feb 5, 2021 in Others[杂七杂八] by ostack (1.4k points)

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1 answer 219 views

r - Mean per group in a data.frame

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 270 views

Pure JavaScript equivalent of jQuery's $.ready() - how to call a function when the page/DOM is ready for it

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 120 views

c# - Sending email in .NET through Gmail

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 201 views

How do you make sure email you send programmatically is not automatically marked as spam?

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 177 views

java - com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 169 views

jquery - Add a property to a JavaScript object using a variable as the name?

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 102 views

python - How do you append to a file?

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 100 views

sql - ROW_NUMBER() in MySQL

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 303 views

regex - Tempered Greedy Token - What is different about placing the dot before the negative lookahead

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 174 views

bash - Parsing JSON with Unix tools

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 374 views

android.os.FileUriExposedException: file:///storage/emulated/0/test.txt exposed beyond app through Intent.getData()

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 219 views

sql - How can I SELECT rows with MAX(Column value), PARTITION by another column in MYSQL?

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 508 views

math - Division of integers in Java

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 134 views

Understanding checked vs unchecked exceptions in Java

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 269 views

javascript - How to append whole set of model to formdata and obtain it in MVC

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 127 views

javascript - Why is setTimeout(fn, 0) sometimes useful?

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 98 views

Web-scraping JavaScript page with Python

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 161 views

Use dynamic variable names in JavaScript

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 71 views

Syntax error on print with Python 3

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 321 views

algorithm - How to count the number of set bits in a 32-bit integer?

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 112 views

How do I declare a 2d array in C++ using new?

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 85 views

java - What does the 'static' keyword do in a class?

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 92 views

javascript - Detecting a mobile browser

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 319 views

coding style - Are PHP short tags acceptable to use?

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 321 views

css - How to disable text selection highlighting

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 133 views

How to generate a self-signed SSL certificate using OpenSSL?

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 106 views

python - Importing files from different folder

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 268 views

algorithm - How to count the number of set bits in a 32-bit integer?

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

1 answer 96 views

How do I declare a 2d array in C++ using new?

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

1 answer 205 views

r - Numbering rows within groups in a data frame

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 93 views

javascript - Detecting a mobile browser

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 181 views

.net - Deserialize JSON into C# dynamic object?

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 91 views

java - How to create RecyclerView with multiple view types

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 142 views

javascript - addEventListener vs onclick

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 472 views

c# - The ViewData item that has the key 'XXX' is of type 'System.Int32' but must be of type 'IEnumerable<SelectListItem>'

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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