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R: rJava package install failing

...low. export JAVA_LIBS="$JAVA_LIBS -ldl" R CMD javareconf See details at http://www-01.ibm.com/support/knowledgecenter/SSPT3X_3.0.0/com.ibm.swg.im.infosphere.biginsights.install.doc/doc/install_install_r.html share ...
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Python __call__ special method practical example

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Storing SHA1 hash values in MySQL

... character, you would only need a 160/8 = 20 character long field. So I recommend you to use BINARY(20) and the UNHEX function to convert the SHA1 value to binary. I compared storage requirements for BINARY(20) and CHAR(40). CREATE TABLE `binary` ( `id` int unsigned auto_increment primary key...
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What is a lambda (function)?

...r programming. The simplest programming example I can think of comes from http://en.wikipedia.org/wiki/Joy_(programming_language)#How_it_works: here is how the square function might be defined in an imperative programming language (C): int square(int x) { return x * x; } The variab...
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Create unique constraint with null columns

...eUploader: { brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
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How do I parallelize a simple Python loop?

... Since this is the chosen answer, is it possible to have a more comprehensive example? What are the arguments of calc_stuff? – Eduardo Pignatelli Apr 11 '18 at 15:28 4 ...
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What is RSS and VSZ in Linux memory management

... way more to it than this, to learn more check the following references: http://manpages.ubuntu.com/manpages/en/man1/ps.1.html https://web.archive.org/web/20120520221529/http://emilics.com/blog/article/mconsumption.html Also see: A way to determine a process's "real" memory usage, i.e. private...
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What is the best method to merge two PHP objects?

...m copy of an answer that had already been posted for months? stackoverflow.com/a/794356/151509 – maryisdead May 9 '19 at 15:44  |  show 2 more...
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How to avoid having class data shared among instances?

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Is there a TRY CATCH command in Bash

...to check that a terminal app has been installed. I want to use a TRY/CATCH command to do this unless there is a neater way. ...