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When do we need curly braces around shell variables?
... # use the variable
${var} # same as above
${var}bar # expand var, and append "bar" too
$varbar # same as ${varbar}, i.e expand a variable called varbar, if it exists.
This has confused me sometimes - in other languages we refer to the variable in the same way, regardless of whether it's on ...
What is the difference between max-device-width and max-width for mobile web?
... has a browser NOT opened maximized - I suppose it is possible in a hybrid app, but that is a different case). Max-width would certainly be more universal.
– Jason
Jan 15 '14 at 20:34
...
How to scale Docker containers in production
...om the following projects, built on top of docker, and designed to support applications in production:
flynn
deis
coreos
Mesos
Update 1
Another related project I recently discovered:
maestro
Update 2
The latest release Openstack contains support for managing Docker containers:
Docker Ope...
How to send and retrieve parameters using $state.go toParams and $stateParams?
...paramsArr)
And you can access them via $stateParams as array like this:
app.controller('overviewController', function($scope, $stateParams) {
var index = $stateParams[0];
var anotherKey = $stateParams[1];
});
Better solution is using object instead of array in both sides:
$stateProvide...
Sharing link on WhatsApp from mobile website (not application) for Android
...t to allow users to share information directly from the web page into WhatsApp.
15 Answers
...
Passing Data between View Controllers
...extField and the UILabel.
Set the first and second View Controllers to the appropriate Swift files in IB.
Passing data back to the previous View Controller
To pass data back from the second view controller to the first view controller, you use a protocol and a delegate. This video is a very clear w...
Build fat static library (device + simulator) using Xcode and SDK 4+
It appears that we can - theoretically - build a single static library that includes both simulator and iPhone and iPad.
10...
How do I log a Python error with debug information?
...
Quoting
What if your application does logging some other way – not using the logging module?
Now, traceback could be used here.
import traceback
def log_traceback(ex, ex_traceback=None):
if ex_traceback is None:
ex_traceback = e...
SELECT INTO a table variable in T-SQL
...ert statement, if you don't declare the columns explicitly, then they are mapped in the order declared in the original create table statement, just like select * does. So, location in the select statement is mapped to oldlocation in the @userData table because location is in position 2 in the resul...
What does this thread join code mean?
... the first join and then the second join handling the InterruptedException appropriately in each case. No need to put them in a loop.
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