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Access lapply index names inside FUN
Is there a way to get the list index name in my lapply() function?
12 Answers
12
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string.charAt(x) or string[x]?
...rks I did showed a three time decrease in performance when using charAt vs indexer in Chrome when the string is boxed in an object. I know that's not really relevant, but still worth noting.jsfiddle.net/mdasxxd2
– Siderite Zackwehdex
Jul 25 '16 at 10:51
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Combining multiple git repositories
...is uses git's filter-branch command):
$ cd phd/code
$ git filter-branch --index-filter \
'git ls-files -s | sed "s#\t#&code/#" |
GIT_INDEX_FILE=$GIT_INDEX_FILE.new \
git update-index --index-info &&
mv $GIT_INDEX_FILE.new $GIT_INDEX_FILE' HEAD
Same for the content of...
How can I open Java .class files in a human-readable way?
....com/p/innlab/downloads/detail?name=jd-gui-0.3.3.windows.zip&can=2&q=" is the best and user friendly option for decompiling .class file....
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How can I define a composite primary key in SQL?
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SELECT * FROM voting WHERE QuestionID = 7
it will use the primary key's index. If however you do this:
SELECT * FROM voting WHERE MemberID = 7
it won't because to use a composite index requires using all the keys from the "left". If an index is on fields (A,B,C) and your criteria is on B and C...
postgresql list and order tables by size
...al_relation_size(<relation_name>) - gets total size of table and its index in bytes.
pg_relation_size(<relation_name>) - gets relation (table/index) size in bytes.
pg_index_size(<relation_name>) - gets index size of the relation in bytes.
current_database() - gets the currently ...
How do I remove duplicates from a C# array?
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You could possibly use a LINQ query to do this:
int[] s = { 1, 2, 3, 3, 4};
int[] q = s.Distinct().ToArray();
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Get all directories within directory nodejs
...s.readdir rootDir, (err, files) ->
dirs = []
for file, index in files
if file[0] != '.'
filePath = "#{rootDir}/#{file}"
fs.stat filePath, (err, stat) ->
if stat.isDirectory()
dirs.push(file...
What are the performance characteristics of sqlite with very large database files? [closed]
... complicates queries, but for me, it's a worthwhile tradeoff to be able to index this much data. An additional advantage is that I can just delete a whole db file to drop a day's worth of data (a common operation for my application).
I'd probably have to monitor table size per file as well to see w...
elasticsearch v.s. MongoDB for filtering application [closed]
...s of a record, can be updated several times a day and this can call for re-indexing of that record to elastic. For that reason alone, using elastic as the sole data store is not a good option for us, as we can't update select fields; we would need to re-index a document in its' entirety. This is not...