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Package doesn't exist error in intelliJ
... tool window:
right click on root pom.xml,
press Add as Maven project,
now unignoring any ignored modules from Maven tool window:
select all ignored (grey) Maven modules,
right click on them,
press Unignore,
and finally rebuilding using Build > Rebuild project. This assumes that a mvn cle...
What exactly is Type Coercion in Javascript?
...typed languages are the scourge of the programming world. However, if you know what you are doing, it can make for shorter, more flexible code.
– Crayon Violent
Nov 11 '13 at 21:06
...
rsync: difference between --size-only and --ignore-times
...a big cp -r A B yesterday, but you forgot to preserve the time stamps, and now you want to do the operation in reverse rsync B A. All those files you cp'ed have yesterday's time stamp, even though they weren't really modified yesterday, and rsync will by default end up copying all those files, and u...
Split delimited strings in a column and insert as new rows [duplicate]
...
Now you can use tidyr 0.5.0's separate_rows is in place of strsplit + unnest.
For example:
library(tidyr)
(df <- read.table(textConnection("1|a,b,c\n2|a,c\n3|b,d\n4|e,f"), header = F, sep = "|", stringsAsFactors = F))
...
What are the differences between git remote prune, git prune, git fetch --prune, etc
...
I know it seems obvious, but git prune looks not only for branches and tags, but all other refs as well.
– user743382
Nov 20 '13 at 21:08
...
Div width 100% minus fixed amount of pixels
... It's about time someone stumbled onto this. I am done with hacks now that I know this. +1 @lechlukasz
– preahkumpii
Mar 9 '13 at 10:22
47
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Parallel.ForEach vs Task.Factory.StartNew
...heduler, by default, uses the new ThreadPool, which handles this very well now.
– Reed Copsey
Feb 17 '11 at 16:42
Than...
A migration to add unique constraint to a combination of columns
...uble tap on an api heavy app) I have two identical records in my DB right now and the model has the validation..
– baash05
Mar 17 '15 at 1:26
6
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How to filter object array based on attributes?
... you can iterate over an object with jQuery, I just cant think of it right now):
function filter(collection, predicate)
{
var result = new Array();
var length = collection.length;
for(var j = 0; j < length; j++)
{
if(predicate(collection[j]) == true)
{
...
How does facebook, gmail send the real time notification?
...e number of requests, and how often you have to send them. You effectively now have an event framework that allows the server to 'fire' events.
Behind this, in terms of the actual content returned from those polls, it's a JSON response, with what appears to be a list of events, and info about them....