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python - How come unpacking is faster than accessing by index?

I'm referring to this question, and especially the comments to the first answer from @David Robinson and @mgilson: ... 13024416/how-come-unpacking-is-faster-than-accessing-by-index...

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

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html - Bootstrap 4 row fill remaining height

I'm struggling to make the a row stretch to fill the rest of the available height. I tried adding h ... //stackoverflow.com/questions/50262517/bootstrap-4-row-fill-remaining-height...

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

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sql - Difference between WITH clause and subquery?

What is the difference between WITH clause and subquery? 1. WITH table_name as ( ... ) 2. ... /stackoverflow.com/questions/30078464/difference-between-with-clause-and-subquery...

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

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javascript - deep merge objects with AngularJS

Normally to shallow copy objects I would use angular.extend() Here's an example of that: var object1 = ... ://stackoverflow.com/questions/17242927/deep-merge-objects-with-angularjs...

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

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C# SHA-1 vs. PHP SHA-1...Different Results?

I am trying to calculate a SHA-1 Hash from a string, but when I calculate the string using php's sha1 function I ... /questions/790232/c-sharp-sha-1-vs-php-sha-1-different-results...

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

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.net - Is it possible to use System.Transactions.TransactionScope with SqlBulkCopy?

Very simple question: is it possible to use System.Transactions.TransactionScope together with SqlBulkCopy? ... -to-use-system-transactions-transactionscope-with-sqlbulkcopy...

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

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111 views

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java - Height of a binary tree

Consider the following code: public int heightOfBinaryTree(Node node) { if (node == null) { return 0; } else ... https://stackoverflow.com/questions/4531449/height-of-a-binary-tree...

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

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javascript - How do you document JSDoc with mixed parameter type?

How do I document a method in JavaScript using JSDoc when the parameter type can be mixed? I have method ... questions/16771258/how-do-you-document-jsdoc-with-mixed-parameter-type...

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

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What are Android Annotations and what are they used for?

I want to know about Android Annotations, is it better way to use in all android projects?. If correct, how to ... /32482215/what-are-android-annotations-and-what-are-they-used-for...

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

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android - Difference between finish() and System.exit(0)

I'm talking about programming in android. In early days I thought that, finish() closes current activity ... .com/questions/18292016/difference-between-finish-and-system-exit0...

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

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linux - Capturing Rscript errors in an output file

Unlike the similar command R CMD BATCH which by default produces an output file which contains any error messages ... /questions/14008139/capturing-rscript-errors-in-an-output-file...

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

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Setting default database for MongoDB shell

When I go into the mongo shell in my terminal, it always starts with the database test, which is ... stackoverflow.com/questions/11336346/setting-default-database-for-mongodb-shell...

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

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jQuery: Get HTML including the selector?

Say I have this HTML: <ul> <li id="example"><strong>Awesome</strong> example text</li> </ul> ... https://stackoverflow.com/questions/5587844/jquery-get-html-including-the-selector...

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

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how to compute similarity between two strings in MYSQL

if i have two strings in mysql: @a="Welcome to Stack Overflow" @b=" Hello to stack overflow"; is there ... /questions/5322917/how-to-compute-similarity-between-two-strings-in-mysql...

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

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How to get list of latest tags in remote git?

There are alot of methods to get latest tags when you have local git repo. But i want to get list of latest ... /questions/20734181/how-to-get-list-of-latest-tags-in-remote-git...

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

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python - Combining rows in pandas

(This question already has an answer here): question from:https://stackoverflow.com/questions/17438906/combining-rows-in-pandas...

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

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Pointer to 2D arrays in C

I know there is several questions about that which gives good (and working) solutions, but none IMHO which says ... /stackoverflow.com/questions/14808908/pointer-to-2d-arrays-in-c...

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

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260 views

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c - What's the meaning of this piece of code? void (*signal(int sig, void (*func)(int)))(int);

I came across this piece of code and completely got lost interpreting its meaning. #include <signal.h> void (* ... meaning-of-this-piece-of-code-void-signalint-sig-void-funcin...

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

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74 views

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How to clear a Perl hash

Let's say we define an anonymous hash like this: my $hash = {}; And then use the hash afterwards. Then it' ... :https://stackoverflow.com/questions/3380780/how-to-clear-a-perl-hash...

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

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css - How to get Floating DIVs inside fixed-width DIV to continue horizontally?

I have a container DIV with a fixed height and width (275x1000px). In this DIV I want to put multiple ... -to-get-floating-divs-inside-fixed-width-div-to-continue-horizontally...

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

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302 views

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python - Sklearn Pipeline: Get feature names after OneHotEncode In ColumnTransformer

I want to get feature names after I fit the pipeline. categorical_features = ['brand', 'category_name ... sklearn-pipeline-get-feature-names-after-onehotencode-in-columntransformer...

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

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200 views

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c++ - Include of iostream leads to different binary

Compiling the following code int main() { return 0; } gives the assembly main: xorl %eax, %eax ret ... .com/questions/52079248/include-of-iostream-leads-to-different-binary...

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

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c++ - Why is returning a reference to a function local value not a compile error?

The following code invokes undefined behaviour. int& foo() { int bar = 1234; return bar; } g++ issues a ... returning-a-reference-to-a-function-local-value-not-a-compile-error...

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

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r - How to remove a level of lists from a list of lists

I have created some lists within a list and would like to be able have each sublist element to be an individual element at ... /how-to-remove-a-level-of-lists-from-a-list-of-lists...

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

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repair - Becoming a professional programmer / software engineer

(Closed.) This question is off-topic. It is not currently accepting answers. question from:https:// ... .com/questions/2648953/becoming-a-professional-programmer-software-engineer...

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

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224 views

1 answer

linux - How to POST URL in data of a curl request

I am trying to post two parameters using curl, path and fileName: curl --request POST 'http://localhost/Service' -- ... questions/18204326/how-to-post-url-in-data-of-a-curl-request...

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

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622 views

1 answer

file - Spring MVC save uploaded MultipartFile to specific folder

I want to save uploaded images to a specific folder in a Spring 3 MVC application deployed on Tomcat ... /10847994/spring-mvc-save-uploaded-multipartfile-to-specific-folder...

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

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97 views

1 answer

reactjs - _reactDom2.default.render is not a function

consider the following react code the main.js file is: import React from 'react'; import ReactDOM from 'react ... .com/questions/36376146/reactdom2-default-render-is-not-a-function...

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

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