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What is the benefit of using $() instead of backticks in shell scripts?
...
@DVK, I thought Keith was referring to the fact that non-block code here (block code means using four spaces at the start of the line) uses backticks to indicate it, making it difficult to put backticks in them, another illustration of the nesting difficulties :-) FWIW, you may fin...
Bootstrap: align input with button
...the .input-append class (this removes the white spacing between the inline-block elements). This may have an adverse effect on font-sizes in the input element if you want to override the defaults using em or % measurements.
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Fast way to discover the row count of a table in PostgreSQL
...vacuum).
This only looks at a random n % (1 in the example) selection of blocks and counts rows in it. A bigger sample increases the cost and reduces the error, your pick. Accuracy depends on more factors:
Distribution of row size. If a given block happens to hold wider than usual rows, the coun...
CSS3 box-sizing: margin-box; Why not?
...
Dimensions of block-level, non-replaced elements in normal flow must satisfy
margin-left + border-left-width + padding-left + width + padding-right + border-right-width + margin-right = width of containing block
When over-constrained...
close vs shutdown socket?
...is is explained in Beej's networking guide. shutdown is a flexible way to block communication in one or both directions. When the second parameter is SHUT_RDWR, it will block both sending and receiving (like close). However, close is the way to actually destroy a socket.
With shutdown, you will ...
Why does changing 0.1f to 0 slow down performance by 10x?
... credits to Carl Hetherington [1])
[1] http://carlh.net/plugins/denormals.php
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Best way to add page specific JavaScript in a Rails 3 app?
...hat I like to do is include the per-view Javascript in a content_for :head block and then yield to that block in your application layout. For example
If it's pretty short then:
<% content_for :head do %>
<script type="text/javascript">
$(function() {
$('user_rating_positve'...
Correct way to close nested streams and writers in Java [duplicate]
...emove the pending
// status of any exception thrown in the try block
if (pending != null) {
if (pending instanceof RuntimeException) {
throw (RuntimeException) pending;
} else {
throw new RuntimeException...
How can I have ruby logger log output to stdout as well as file?
...st(logger)
Module.new do
define_method(:add) do |*args, &block|
logger.add(*args, &block)
super(*args, &block)
end
define_method(:<<) do |x|
logger << x
super(x)
end
define_method(:close) ...
How to tell if a tag failed to load
...r (for
example a DNS error, or an HTTP 404
error) Executing the script block must
just consist of firing a simple event
named error at the element.
This means you don't have to do any error prone polling and can combine it with async and defer attribute to make sure the script is not block...