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How to use the pass statement?
... is supposed to happen, and does not need to be actually evaluated and (at least temporarily) stored in memory.
Ignoring (all or) a certain type of Exception (example from xml):
try:
self.version = "Expat %d.%d.%d" % expat.version_info
except AttributeError:
pass # unknown
Note: Ignorin...
Convert Mercurial project to Git [duplicate]
...
If you have errors like "repository has at least one unnamed head", you can specify --force option to deal with broken tree.
– iurii
May 21 '14 at 14:23
...
How to check for valid email address? [duplicate]
...ress) is usually enough. Something like: it has exactly one @ sign, and at least one . in the part after the @:
[^@]+@[^@]+\.[^@]+
You'd probably also want to disallow whitespace -- there are probably valid email addresses with whitespace in them, but I've never seen one, so the odds of this bein...
Is it possible to change the package name of an Android app on Google Play?
...the users who already installed it won't have access to it anymore, but at least the potential new users won't find it on the market.
Not ideal and can be annoying to the users, sometimes even impossible to implement due to the status/possibilities of the app. But since Google left us no choice th...
Why is SCTP not much used/known
...nd not reliable, and telecoms will not convert to it if it won't handle at least the load that SS7 handles. This is why SCTP was developed. It tries:
to mimic all advantages of the SS7 network accumulated over the decades.
to create a connection-oriented protocol better than TCP in speed, security...
What's the (hidden) cost of Scala's lazy val?
...compiler will increase the size of the field to being able to represent at least 2 values, i.e. as a byte. This just goes on for huge classes.
But you might wonder why this works? The thread-local caches must be cleared when entering a synchronized block such that the non-volatile x value is flushe...
Django's SuspiciousOperation Invalid HTTP_HOST header
...not the domain name and the IP address is not in the ALLOWED_HOSTS - or at least that is what was happening with me - I could repro it by point my browser to the IP address.
– markmnl
May 17 '14 at 2:38
...
$(document).ready equivalent without jQuery
...;& !ReadyObj.isReady) ) {
// Make sure body exists, at least, in case IE gets a little overzealous (ticket #5443).
if ( !document.body ) {
return setTimeout( ReadyObj.ready, 1 );
}
// Remember that the DOM is re...
How to hash a string into 8 digits?
...r answer is astronomically more likely to produce a collision than not. At least some degree of uniqueness is implicitly required by the question, but your answer is a hash function in the same spirit as one that simply returns 12345678 for every input. I was able to experimentally generate a collis...
Java `final` method: what does it promise?
...'t forget to notion this in javadoc!(java documentation)
Last but not the least, final keyword has very important role in Java Memory Model (JMM). It's guaranteed by JMM that to achieve visibility of final fields you don't need proper synchronization. E.g.:
class A implements Runnable {
final St...