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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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Creating a JSON response using Django and Python
...r versions of IE. Here is some discussion of the issue github.com/blueimp/jQuery-File-Upload/issues/123
– Victory
Apr 25 '14 at 22:05
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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 define a composite primary key in SQL?
...
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 ...
git clone from another directory
.../repo.git/
file:///path/to/repo.git/
These two syntaxes are mostly equivalent, except the former implies --local option.
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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...
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...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...