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Scanning Java annotations at runtime [closed]
... No maven integration yet.
Google reflections pulls in Google collections. Indexes everything and then is super fast.
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What's the fastest way to merge/join data.frames in R?
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In the sqldf code that was posted in the question, it might appear that indexes were used on the two tables but, in fact, they are placed on tables which were overwritten before the sql select ever runs and that, in part, accounts for why its so slow. The idea of sqldf is that the data frames in...
How to find duplicates in 2 columns not 1
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I found it helpful to add a unqiue index using an "ALTER IGNORE" which removes the duplicates and enforces unique records which sounds like you would like to do. So the syntax would be:
ALTER IGNORE TABLE `table` ADD UNIQUE INDEX(`id`, `another_id`, `one_more...
How to un-submodule a Git submodule?
...rm),
and remove the special entry representing that submodule SHA1 in the index of the parent repo (rm).
Once the removal of the submodule is complete (deinit and git rm), you can rename the folder back to its original name and add it to the git repo as a regular folder.
Note: if the submodule w...
How to undo “git commit --amend” done instead of “git commit”
... Move the current head so that it's pointing at the old commit
# Leave the index intact for redoing the commit.
# HEAD@{1} gives you "the commit that HEAD pointed at before
# it was moved to where it currently points at". Note that this is
# different from HEAD~1, which gives you "the commit that i...
Get the closest number out of an array
...to show this in action:
def closest (num, arr):
curr = arr[0]
for index in range (len (arr)):
if abs (num - arr[index]) < abs (num - curr):
curr = arr[index]
return curr
array = [2, 42, 82, 122, 162, 202, 242, 282, 322, 362]
number = 112
print closest (number, ar...
Are there any disadvantages to always using nvarchar(MAX)?
...te, different storage etc). It fails to mention the actual differences: no index, no online operations on MAX types
– Remus Rusanu
Aug 25 '11 at 15:53
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How to include route handlers in multiple files in Express?
...e I was able to dynamically include all routes in a sub directory.
routes/index.js
var fs = require('fs');
module.exports = function(app){
fs.readdirSync(__dirname).forEach(function(file) {
if (file == "index.js") return;
var name = file.substr(0, file.indexOf('.'));
r...
unsigned int vs. size_t
...se size_t whenever dealing with memory ranges." -- that implies that every index to every array should be size_t - I hope you don't mean that. Most of the time we don't deal with arrays where cardinality of address space + portability even matters. In these cases you'd take size_t. In every other ca...
How big can a MySQL database get before performance starts to degrade
...ter. However if you are not ready for this yet, you can always tweak your indexes for the queries you are running to speed up the response times. Also there is a lot of tweaking you can do to the network stack and kernel in Linux that will help.
I have had mine get up to 10GB, with only a moderat...