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Automatic TOC in github-flavoured-markdown
...u.rubyforge.org/maruku.md or raw.github.com/MahApps/MahApps.Metro/gh-pages/index.md
– Rebecca Scott
May 10 '12 at 12:55
2
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Remove NA values from a vector
...lues have been removed.
Remember is.na(foo) returns a boolean matrix, so indexing foo with the opposite of this value will give you all the elements which are not NA.
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Extract a dplyr tbl column as a vector
...ad because you do not need to repeat the name of the column or specify the index.
iris2 %>% select(Species) %>% unlist(use.names = FALSE)
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rails + MySQL on OSX: Library not loaded: libmysqlclient.18.dylib
...lient.18.dylib /usr/local/mysql/lib/libmysqlclient.18.dylib /usr/local/bin/indexer
sudo install_name_tool -change libmysqlclient.18.dylib /usr/local/mysql/lib/libmysqlclient.18.dylib /usr/local/bin/search
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Ruby - test for array
... The only issue with this is say I want to check if something is an indexed iterable, so arrays, linked lists, etc. would be cool, but I don't want key value stores like hashes?
– Colton Voege
Jan 8 '17 at 3:52
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How to deep watch an array in angularjs?
....myArray.splice(0, 1); // remove element
$scope.myArray[0] = {}; // assign index to different value
$watch(..., true) is triggered by EVERYTHING above AND:
$scope.myArray[0].someProperty = "someValue";
JUST ONE MORE THING...
$watch() is the only one that triggers when an array is replaced with...
How to download a branch with git?
...-pages'
And pull the branch:
$ git pull
Already up-to-date.
ls:
$ ls
index.html params.json stylesheets
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Check if an element is present in an array [duplicate]
... // false
[1, 2, 3].includes(1, 2); // false (second parameter is the index position in this array at which to begin searching)
As of JULY 2018, this has been implemented in almost all major browsers, if you need to support IE a polyfill is available.
Edit: Note that this returns false if th...
How to draw vertical lines on a given plot in matplotlib?
...ignal in time representation, how to draw lines marking corresponding time index?
6 Answers
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What does “O(1) access time” mean?
...set n.
An example of O(1) would be an ArrayList accessing its element with index.
O(n) also known as Linear Order, the performance will grow linearly and in direct proportion to the size of the input data.
An example of O(n) would be an ArrayList insertion and deletion at random position. As each s...