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Evaluate expression given as a string
...s("5+5")
[1] "character"
> class(parse(text="5+5"))
[1] "expression"
Calling eval() invokes many behaviours, some are not immediately obvious:
> class(eval(parse(text="5+5")))
[1] "numeric"
> class(eval(parse(text="gray")))
[1] "function"
> class(eval(parse(text="blue")))
Error in eva...
ActiveMQ or RabbitMQ or ZeroMQ or [closed]
...velopes are quite big.
ZeroMq is a very lightweight messaging system specially designed for high throughput/low latency scenarios like the one you can find in the financial world. Zmq supports many advanced messaging scenarios but contrary to RabbitMQ, you’ll have to implement most of them yourse...
How to run Visual Studio post-build events for debug build only
...figuration)" == "Debug" worked for me. BTW, if you want to do something in all other configs, use if NOT "$(Configuration)" == "Debug".
– Ralf Hundewadt
Jun 29 '17 at 9:46
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HTML - how can I show tooltip ONLY when ellipsis is activated
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If you want the tooltip automatically removed if the text is no longer overflowing modify to: $(document).on('mouseenter', '.mightOverflow', function() { var $t = $(this); var title = $t.attr('title'); if (!title){ if (this.offsetWidth < this.scro...
When should I use the “strictfp” keyword in java?
I've looked up what this does, but does anyone actually have an example of when you would use the strictfp keyword in Java? Has anyone actually found a use for this?
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Text border using css (border around text)
...e CSS3 text-shadow :
text-shadow: 0 0 2px #fff;
However it wont show in all browsers right away. Using a script library like Modernizr will help getting it right in most browsers though.
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How to open an elevated cmd using command line for Windows?
... batch file with this and saved it as admincmd.bat in my windows folder so all I have to do is type "admincmd" hit enter and it opens an admin cmd.(I also added another line to the batch file with "exit" so it closes the non admin cmd window)
– Tony Brix
Nov 16...
Do I need elements in persistence.xml?
...k at the Chapter2. Setup and configuration too for more details.
EDIT: Actually, If you don't mind not being spec compliant, Hibernate supports auto-detection even in Java SE. To do so, add the hibernate.archive.autodetection property:
<persistence-unit name="eventractor" transaction-type="RESOUR...
How to convert String to Long in Kotlin?
...tlin, you don't need to worry about where or why, just know in Kotlin that all String have an extension function toLong() as well as toInt() and others. You can use these. Maybe @ilya can update this answer to current Kotlin (remove jet.String reference.)
– Jayson Minard
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Find the last element of an array while using a foreach loop in PHP
...x compared to this one. I have not ran any tests but I guess this answer shall be faster as it is not extracting array of keys.This shall have O(1) speed
– Vaibhav Kamble
Mar 20 '09 at 7:09
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