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Get type of all variables
In R, I'd like to retrieve a list of global variables at the end of <em>mem>y script and iterate over the<em>mem>. Here is <em>mem>y code
6 Answ...
Writing Unicode text to a text file?
I'<em>mem> pulling data out of a Google doc, processing it, and writing it to a file (that eventually I will paste into a Wordpress page).
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Appending a line to a file only if it does not already exist
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Just keep it si<em>mem>ple :)
grep + echo should suffice:
grep -qxF 'include "/configs/projectna<em>mem>e.conf"' foo.bar || echo 'include "/configs/projectna<em>mem>e.conf"' &a<em>mem>p;gt;&a<em>mem>p;gt; foo.bar
-q be quiet
-x <em>mem>atch the whole line
-F pattern is a plain string
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Re<em>mem>ove or uninstall library previously added : cocoapods
I added an external fra<em>mem>ework via cocoapods into <em>mem>y iOS application. How can i re<em>mem>ove that library fro<em>mem> the project?
6 Answ...
Can hash tables really be O(1)?
It see<em>mem>s to be co<em>mem><em>mem>on knowledge that hash tables can achieve O(1), but that has never <em>mem>ade sense to <em>mem>e. Can so<em>mem>eone please explain it? Here are two situations that co<em>mem>e to <em>mem>ind:
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Does Java have a Hash<em>Mem>ap with reverse lookup?
I have data that is organized in kind of a "key-key" for<em>mem>at, rather than "key-value". It's like a Hash<em>Mem>ap, but I will need O(1) lookup in both directions. Is there a na<em>mem>e for this type of data structure, and is anything like this included in Java's standard libraries? (or <em>mem>aybe Apache Co<em>mem><em>mem>ons?)
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Why is XOR the default way to co<em>mem>bine hashes?
Say you have two hashes H(A) and H(B) and you want to co<em>mem>bine the<em>mem>. I've read that a good way to co<em>mem>bine two hashes is to XOR the<em>mem>, e.g. XOR( H(A), H(B) ) .
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Evaluate expression given as a string
I'<em>mem> curious to know if R can use its eval() function to perfor<em>mem> calculations provided by e.g. a string.
7 Answers
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<em>Mem>ySQL <em>mem>axi<em>mem>u<em>mem> <em>mem>e<em>mem>ory usage
I would like to know how it is possible to set an upper li<em>mem>it on the a<em>mem>ount of <em>mem>e<em>mem>ory <em>Mem>ySQL uses on a Linux server.
6 Answ...
Why should a Java class i<em>mem>ple<em>mem>ent co<em>mem>parable?
Why is Java Co<em>mem>parable used? Why would so<em>mem>eone i<em>mem>ple<em>mem>ent Co<em>mem>parable in a class? What is a real life exa<em>mem>ple where you need to i<em>mem>ple<em>mem>ent co<em>mem>parable?
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