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What specifically are wall-clock-time, user-cpu-time, and system-cpu-time in UNIX?
...rt per second of elapsed time. These show that there's no simple (or even complex) formula that you could use.
– Jonathan Leffler
Dec 6 '17 at 14:10
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Validating email addresses using jQuery and regex
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UPDATES
http://so.lucafilosofi.com/jquery-validate-e-mail-address-regex/
using new regex
added support for Address tags (+ sign)
function isValidEmailAddress(emailAddress) {
var pattern = /^([a-z\d!#$%&'*+\-\/=?^_`{|}~\u00A0-\uD7FF\uF900-\uFDC...
Mercurial move changes to a new branch
I have a number of changes that I committed to my local repository, but have not yet been pushed. Since on a feature is taking longer than expected, I want to swap these changes onto a named branch before I push. How can I do this?
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Proper Linq where clauses
...Chain ORing conditions is somewhat possible using this extension: albahari.com/nutshell/predicatebuilder.aspx
– jahu
May 16 '14 at 12:58
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List all of the possible goals in Maven 2?
I'm new to Maven, coming from the Ant world.
5 Answers
5
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What does gcc's ffast-math actually do?
...As you mentioned, it allows optimizations that do not preserve strict IEEE compliance.
An example is this:
x = x*x*x*x*x*x*x*x;
to
x *= x;
x *= x;
x *= x;
Because floating-point arithmetic is not associative, the ordering and factoring of the operations will affect results due to round-off. T...
Android Preferences: How to load the default values when the user hasn't used the preferences-screen
...ks partially or not always) see Steve Waring's answer below (stackoverflow.com/a/25602205/4410376). Most likely you have several shared-prefs files, i.e. android is creating several shared-prefs files based on your configuration or messy code.
– Hack06
Mar 22 '...
difference between iframe, embed and object elements
... The <iframe>'s strength is that the embedded code is 'live' and can communicate with the parent document.
<embed>
Standardised in HTML 5, before that it was a non standard tag, which admittedly was implemented by all major browsers. Behaviour prior to HTML 5 can vary ...
The embed elem...
How do I check if a type is a subtype OR the type of an object?
...will also give you false positives. As Eric Lippert has pointed out in the comments, while the method will indeed return True for the two above questions, it will also return True for these, which you probably don't want:
void Main()
{
typeof(Base).IsAssignableFrom(typeof(Derived)).Dump();
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How to delete an old/unused Data Model Version in Xcode
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