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How to get the instance id from within an ec2 instance?
...documentation on the subject.
Run:
wget -q -O - http://169.254.169.254/latest/meta-data/instance-id
If you need programatic access to the instance ID from within a script,
die() { status=$1; shift; echo "FATAL: $*"; exit $status; }
EC2_INSTANCE_ID="`wget -q -O - http://169.254.169.254/latest/me...
How can I add an empty directory to a Git repository?
...
Doesn't work if you're writing a unit test that should test code on an empty directory...
– thebjorn
Dec 23 '15 at 10:22
...
Detecting when a div's height changes using jQuery
... demo http://jsfiddle.net/aD49d/
$(function () {
var prevHeight = $('#test').height();
$('#test').attrchange({
callback: function (e) {
var curHeight = $(this).height();
if (prevHeight !== curHeight) {
$('#logger').text('height chan...
Is there a way to detect if a browser window is not currently active?
... has a small false positive rate. It has the advantage to be multibrowser (tested on Firefox 5, Firefox 10, MSIE 9, MSIE 7, Safari 5, Chrome 9).
<div id="x"></div>
<script>
/**
Registers the handler to the event for the given object.
@param obj the object wh...
ReactJS render string with non-breaking spaces
...
If you want to display a pretty xml:
var str = "<test>\n\t\t<value>1</value>\n</test>\n".replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/\t/g, "\u00a0").replace(/\n/g, '<br/>');
return (
<div dangerouslySetInnerHTML={{__h...
TypeError: 'str' does not support the buffer interface
...
I tested it with ActiveState Python 3.1 and 3.2. On my machine it works in both.
– Michał Niklas
Mar 29 '11 at 11:21
...
What is the best way to iterate over a dictionary?
..., remember: using System.Linq; This is not incluted in fx. auto generated test classes.
– Tinia
Nov 24 '11 at 14:47
...
Is returning null bad design? [closed]
...ould potentially return null.
// Two possible code paths now so harder to test.
if (c != null) {
for (Item item : c) {
// Process item.
}
}
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...
How to write :hover condition for a:before and a:after?
... span {
font-size:12px;
}
a {
color:green;
}
.test1>a:hover span {
display:none;
}
.test1>a:hover:before {
color:red;
content:"Apple";
}
</style>
</head>
<body>
<div class="test1">
<a href="#"&...
Getting started with Haskell
... bit more difficult in Haskell. Check this SO question in case you want to test your solutions with QuickCheck (see Intermediate below).
Once you have done a few of those, you could move on to doing a few of the Project Euler problems. These are sorted by how many people have completed them, which i...