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Apache Spark: The number of cores vs. the number of executors
...es/s. For run 3 the steady utilization is doubled, around 100 M bytes/s.
From the cloudera blog post shared by DzOrd, you can see this important quote:
I’ve noticed that the HDFS client has trouble with tons of concurrent threads. A rough guess is that at most five tasks per executor can ach...
POST data with request module on Node.JS
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Aside from the errors in the json string, this one did the trick for me! Note that the "form" section has an object passed to it, so you could just define everything in there as an object to begin with and not do that prep work
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Changing navigation title programmatically
...s to the class itself. You need to refer to an instance of ViewController. From within a method on your class, such as viewDidLoad, you can do so using self. If you do not know the difference between a class and an instance, I highly recommend you learn what it is. This article will help.
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How to replace plain URLs with links?
...u insist on a regular expression, the most comprehensive is the URL regexp from Component, though it will falsely detect some non-existent two-letter TLDs by looking at it.
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Is there an equivalent to background-size: cover and contain for image elements?
...site with many pages and different background pictures, and I display them from CSS like:
14 Answers
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How to convert hex to rgb using Java?
...color to RGB code in Java? Mostly in Google, samples are on how to convert from RGB to hex.
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How to use PHP OPCache?
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opcache.save_comments=1
If disabled, all PHPDoc comments are dropped from the code to reduce
the size of the optimized code. Disabling "Doc Comments" may break
some existing applications and frameworks (e.g. Doctrine, ZF2,
PHPUnit)
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What does the Java assert keyword do, and when should it be used?
...st throwing a new IllegalArgumentException with the message? I mean, aside from having o add throws to the method declaration and the code to manage that exception somewhere else. Why assert insetad of throwing new Exception? Or why not an if instead of assert? Can't really get this :(
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Using Selenium Web Driver to retrieve value of a HTML input
... That's what I've bumped into right now: trying to get a value from a textarea, which is neither a "value" attribute, nor a between-tag text (set dynamically as "value" attribute.
– C-F
Jun 5 '17 at 22:03
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What's the point of g++ -Wreorder?
... The order was man page-> SO answer. Here is an archive of the man page from 2007 that lists this example explicitly. The upvoted comment from Ben S is a hilarious example of someone suggesting that something exist without even checking that it does already. web.archive.org/web/20070712184121/htt...