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How does facebook, gmail send the real time notification?
...er 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. It's minified though, so is a bit hard to read.
In terms of the actual technology, AJAX is the way to go here, because yo...
What is the best way to force yourself to master vi? [closed]
...enefits of Vim is the speed it allows you. The arrow keys also prevent you from really embracing the modal nature, which is very powerful when mastered.
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What is the purpose of the Visual Studio Hosting Process?
... The hosting process tends to keep DLLs loaded that I want to write to from another running copy of Visual Studio. Killing the hosting process, or even exiting and restarting the offending VS, does not help, because the newly started hosting process loads the DLL again. This is the reason why I ...
Best way to specify whitespace in a String.Split operation
...(new char[0]);
then white-space is assumed to be the splitting character. From the string.Split(char[]) method's documentation page.
If the separator parameter is null or contains no characters, white-space characters are assumed to be the delimiters. White-space characters are defined by the Unic...
Kotlin Ternary Conditional Operator
... but invalid Java/C#/JavaScript
var v = if (a) b else c
If you're coming from a language where if is a statement, this might seem unnatural but that feeling should soon subside.
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What are Flask Blueprints, exactly?
...version of its structure in the plaster of your application.
# An example
from flask import Blueprint
tree_mold = Blueprint("mold", __name__)
@tree_mold.route("/leaves")
def leaves():
return "This tree has leaves"
@tree_mold.route("/roots")
def roots():
return "And roots as well"
@tree_...
Find Oracle JDBC driver in Maven repository
...omputer repository with (note I pulled the groupId, artifactId and version from the POM):
mvn install:install-file -DgroupId=com.oracle -DartifactId=ojdbc14 \
-Dversion=10.2.0.3.0 -Dpackaging=jar -Dfile=ojdbc.jar -DgeneratePom=true
The last parameter for generating a POM will save you from p...
Why is Java's Iterator not an Iterable?
...instance in a collection. Iterable implies that one may obtain an iterator from an object to traverse over its elements - and there's no need to iterate over a single instance, which is what an iterator represents.
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HAProxy redirecting http to https (ssl)
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To add to this, from User2966600's answer below, with 301 added, use this to redirect to https for only a specific domain: redirect scheme https code 301 if { hdr(Host) -i www.mydomain.com } !{ ssl_fc }
– Quentin Skouse...
Side-by-side plots with ggplot2
...
You can use the following multiplot function from Winston Chang's R cookbook
multiplot(plot1, plot2, cols=2)
multiplot <- function(..., plotlist=NULL, cols) {
require(grid)
# Make a list from the ... arguments and plotlist
plots <- c(list(...), ...