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How to turn off INFO logging in Spark?
I installed Spark using the AWS EC2 guide and I can launch the program fine using the bin/pyspark script to get to the spark prompt and can also do the Quick Start quide successfully.
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How to create a file with a given size in Linux?
...ocksize will perform much worse once it gets very big, as it will allocate and read that amount into memory before writing. If this is somethig like bs=4GiB you'll probably end up swapping.
– Brian
Sep 29 '08 at 7:40
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Does the default constructor initialize built-in types?
...The behavior of () initializer is different in some respects between C++98 and C++03, but not in this case. For the above class C it will be the same: () initializer performs zero initialization of C::x.
Another example of initialization that is performed without involving constructor is, of course...
ImportError: No module named requests
...requests (or pip3 install requests for python3) if you have pip installed and Pip.exe added to the Path Environment Variable. If pip is installed but not in your path you can use python -m pip install requests (or python3 -m pip install requests for python3)
Alternatively from a cmd prompt, use &g...
How do I parse command line arguments in Bash?
...as non-opt/last argument:
#93.184.216.34 example.com
To better understand ${i#*=} search for "Substring Removal" in this guide. It is functionally equivalent to `sed 's/[^=]*=//' <<< "$i"` which calls a needless subprocess or `echo "$i" | sed 's/[^=]*=//'` which calls two needless subp...
How to properly seed random number generator
I am trying to generate a random string in Go and here is the code I have written so far:
9 Answers
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How to learn R as a programming language [closed]
...ning it as a statistical system. My question is prompted by lack of understanding of such functions as parse, eval, etc. which may not find frequent use by an R user with a 'statistics' persuasion.
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Javascript - removing undefined fields from an object [duplicate]
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A one-liner using ES6 arrow function and ternary operator:
Object.keys(obj).forEach(key => obj[key] === undefined ? delete obj[key] : {});
Or use short-circuit evaluation instead of ternary: (@Matt Langlois, thanks for the info!)
Object.keys(obj).forEach(...
Add text to Existing PDF using Python
...ext to an existing PDF using Python, what is the best way to go about this and what extra modules will I need to install.
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Xcode 4 says “finished running ” on the targeted device — Nothing happens
...ice. All provisioning profiles are up to date. I've already tried deleting and re-installing them.
25 Answers
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