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What is the difference between concurrency and parallelism?
...oth be running at the same instant. For example, multitasking on a single-core machine.
Parallelism is when tasks literally run at the same time, e.g., on a multicore processor.
Quoting Sun's Multithreaded Programming Guide:
Concurrency: A condition that exists when at least two threads are m...
为什么你有10年经验，但成不了专家？ - 杂谈 - 清泛网 - 专注C/C++及内核技术
...个领域的专家？有人说主要靠经验，有人说靠天赋，但是大量的研究发现：不论是经验还是天赋，都不是成为...如何成为一个领域的专家？
有人说主要靠经验，有人说靠天赋，但是大量的研究发现：不论是经验还是天赋，都不...
git-diff to ignore ^M
...t-handled repos. There's an option to auto-convert:
$ git config --global core.autocrlf true
Of course, this is said to convert crlf to lf, while you want to convert cr to lf. I hope this still works …
And then convert your files:
# Remove everything from the index
$ git rm --cached -r .
# R...
Path to MSBuild
...iles (x86)\MSBuild\12.0\bin\amd64\
PSPath : Microsoft.PowerShell.Core\Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSBuild\ToolsVersions\12.0
PSParentPath : Microsoft.PowerShell.Core\Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSBuild\ToolsVersions
PSChildName : 12.0
PSDriv...
File upload progress bar with jQuery
...er in that it doesn't need jQuery.ajaxForm. Works perfect with just jQuery core library.
– Jeffrey Goines
May 6 '14 at 7:30
9
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Cocoa Core Data efficient way to count entities
I read much about Core Data.. but what is an efficient way to make a count over an Entity-Type (like SQL can do with SELECT count(1) ...). Now I just solved this task with selecting all with NSFetchedResultsController and getting the count of the NSArray ! I am sure this is not the best way...
...
Integrate ZXing in Android Studio
...pps:zxing-android-embedded:3.0.2@aar'
implementation 'com.google.zxing:core:3.2.0'
}
and Gradle does all the magic to compile the code and makes it accessible in your app.
To start the Scanner afterwards, use this class/method:
From the Activity:
new IntentIntegrator(this).initiateScan(); //...
Getting “NoSuchMethodError: org.hamcrest.Matcher.describeMismatch” when running test in IntelliJ 10.
... make sure you are NOT using mockito-all, but instead mockito-core with an exclusion of hamcrest
– Ulf Lindback
Nov 21 '14 at 10:19
1
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JSON: why are forward slashes escaped?
... an old question, I am not using PHP today... But, as discussion blog, the core is "The default MUST be the most frequent use", so uglyness is about ignore this "most frequent use" of (also ugly) behaviour of Javascript.
– Peter Krauss
Sep 2 '19 at 11:46
...
Compiling with g++ using multiple cores
...e large projects quicker (for example 4 source files at a time for a multi-core CPU)?
8 Answers
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