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c++ - Why is iterating 2D array row major faster than column major?

Here is simple C++ code that compare iterating 2D array row major with column major. #include <iostream> ... is faster than column major? See Question&Answers more detail:os...

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c++ - Open file with fopen, given absolute path on Windows

I'm trying to make a program that counts the number of lines of a file, when I try to pass the absolute ... program so you can open the file? See Question&Answers more detail:os...

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c# - WMI to reboot remote machine

I found this code on an old thread to shutdown the local machine: using System.Management; void Shutdown() { ... would prefer WMI going forward. See Question&Answers more detail:os...

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mysql - How to speed up sql queries ? Indexes?

I have the following database structure : create table Accounting ( Channel, Account ) create table ChannelMapper ( ... query plan : Thanks, See Question&Answers more detail:os...

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python - ValueError: cannot reshape array of size 30470400 into shape (50,1104,104)

I am trying to run threw this Tutorial http://emmanuelle.github.io/segmentation-of-3-d-tomography-images-with- ... Can somebody help me out? See Question&Answers more detail:os...

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java - Java7 Refusing to trust certificate in trust store

I've a weird problem - a supplier uses TLS SSLv3 with both a self signed client and server certificate. ... ) main, called closeInternal(true) See Question&Answers more detail:os...

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swing - Webkit browser in a Java app

I was wondering if there was a Java swing component that uses webkit. Is it possible to create a webkit browser in Java - must I use JavaFX ? See Question&Answers more detail:os...

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How do I get my Eclipse-Maven project to automatically update its classpath when I change a dependency in my pom.xml file?

I'm using Eclipse Mars with Maven (v 3.3). When I update a dependency in my pom (change the version) ... menu, Build Automatically is checked. See Question&Answers more detail:os...

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graphics - Algorithm for drawing a 4-connected line

I'm looking for an algorithm (coded in Java would be nice, but anything clear enough to translate to Java is ... any help anyone can provide. See Question&Answers more detail:os...

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c++ - How does a 32 bit processor support 64 bit integers?

In C++, you can use an int which is usually 4 bytes. A long long integer is usually 8 bytes. If ... the alu add larger integers or something? See Question&Answers more detail:os...

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sockets - PHP Post data with Fsockopen

I am attempting to post data using fsockopen, and then returning the result. Here is my current code: <?php ... the variable posting its data? See Question&Answers more detail:os...

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How to download files from webview Android?

My code below loads the url page fine and after searching for a song when I click on the download link it crashes. ... signal. PID: 357 SIG: 9 See Question&Answers more detail:os...

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apache spark - reading json file in pyspark

I'm new to PySpark, Below is my JSON file format from kafka. { "header": { "platform":"atm", " ... in ValueError: too many values to unpack See Question&Answers more detail:os...

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Sending an HTTP Post using Javascript triggered event

I'm pretty new to javascript and am working on an embedded system which decodes video over IP. I have written ... data in it? Many thanks See Question&Answers more detail:os...

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pointers - C++: Why is const_cast evil?

I keep hearing this statement, while I can't really find the reason why const_cast is evil. In the following example ... you for any efforts :) See Question&Answers more detail:os...

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c# Visual Studio ...adding references programmatically

Is there anyway that a reference can be added to a solution programmatically? I have an add-in button, when the ... be added. Is this possible? See Question&Answers more detail:os...

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javascript - creating objects from JS closure: should i use the "new" keyword?

i answered one question about closures here in SO with this sample: function Constructor() { var ... creating objects from closures? See Question&Answers more detail:os...

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How C strings are allocated in memory?

Say I have a simple function that returns a C string this way: const char * getString() { const char * ... between the two versions? Thank you! See Question&Answers more detail:os...

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c++ - Why can't I access a protected member from an instance of a derived class?

I haven't done C++ in a while and can't figure out why following doesn't work: class A { protected: int ... derived classes? What am I missing? See Question&Answers more detail:os...

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need an algorithm for collapsing netblock ranges into lists of superset ranges

My math-fu is failing me! I need an efficient way of reducing network ranges to supersets, e.g. if I input list ... .g., removed from my list). See Question&Answers more detail:os...

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php - Is there a way to loop through a multidimensional array without knowing it's depth?

So far, if I have to loop through a multidimensional array, I use a foreach loop for each dimension. e.g for ... silly. Is there a better way? See Question&Answers more detail:os...

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recursion - MySQL - Recursing a tree structure

I have a database table which link locations together; a location can be in a location, which can be inside ... how deep, just using MySQL? See Question&Answers more detail:os...

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tsql - Is it possible to set start of week for T-SQL DATEDIFF function?

I use DATEDIFF function to filter records added this week only: DATEDIFF(week, DateCreated, GETDATE()) = 0 and I ... 0 in third column too. See Question&Answers more detail:os...

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jquery - Finding memory leaks in JavaScript using firebug?

Are there any add-ons for Firefox that I can use to find out with part of the JavaScript causes memory leaks? See Question&Answers more detail:os...

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variable variables - what is "$$" in PHP

I saw this code if (is_null($$textVarName)) { $$textVarName = $_defaultTexts[$type]; } what is code "$$" ? See Question&Answers more detail:os...

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java - SSLContext initialization

I'm looking at the JSSE reference guide, I need to obtain an instance of SSLContext in order to create a ... provider should I use? Thanks See Question&Answers more detail:os...

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hash - Git is moving to new hashing algorithm SHA-256 but why git community settled on SHA?256

I just learned from this HN-post that git is moving to new hashing algorithm ( from SHA-1 to SHA-256 ) ... //crypto.stackexchange.com/q/26336 ) See Question&Answers more detail:os...

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map - LeafletJS markers move on zoom

Using LeafletJS which is ace, well until now :P We don't have a JSON object or anything, so I am taking ... /jsbin.com/edegox/1/edit Cheers Tom See Question&Answers more detail:os...

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

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