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Apache Spark: The number of cores vs. the number of executors
I'm trying to understand the relationship of the number of cores and the number of executors when running a Spark job on YARN.
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How to position a table at the center of div horizontally & vertically
...entering is one of the biggest issues in CSS. However, some tricks exist:
To center your table horizontally, you can set left and right margin to auto:
<style>
#test {
width:100%;
height:100%;
}
table {
margin: 0 auto; /* or margin: 0 auto 0 auto */
}
</style>
To ...
jQuery - Detect value change on hidden input field
...this is way late, but I've discovered an answer, in case it becomes useful to anyone who comes across this thread.
Changes in value to hidden elements don't automatically fire the .change() event. So, wherever it is that you're setting that value, you also have to tell jQuery to trigger it.
funct...
POST unchecked HTML checkboxes
... you're going with a markup-based solution like this, it's probably better to put the hidden input first, per many the other answers. If you're using PHP, you can then do away with the javascript dependency, because only the last value gets used.
– Ben
Sep 13 '...
How do I make a redirect in PHP?
Is it possible to redirect a user to a different page through the use of PHP?
30 Answers
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Does “display:none” prevent an image from loading?
Every responsive website development tutorial recommends using the display:none CSS property to hide content from loading on mobile browsers so the website loads faster. Is it true? Does display:none not load the images or does it still load the content on mobile browser? Is there any way to pre...
How to find encoding of a file via script on Linux?
I need to find the encoding of all files that are placed in a directory. Is there a way to find the encoding used?
17 Answe...
TreeMap sort by value
I want to write a comparator that will let me sort a TreeMap by value instead of the default natural ordering.
8 Answers
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What does the restrict keyword mean in C++?
...e recommends it's usage when available:
restrict keyword
! New to 1999 ANSI/ISO C standard
! Not in C++ standard yet, but supported by many C++ compilers
! A hint only, so may do nothing and still be conforming
A restrict-qualified pointer (or reference)...
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Are multiple `.gitignore`s frowned on?
...o consisted of several independent projects, it seems it would be simplest to just have one .gitignore file at the root of the repo than various ones throughout. Is there a standard best practice on this or some analysis online of when one approach is better than the other?
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