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Better explanation of when to use Imports/Depends
... use "Depends").
A "Depends" directive attempts to ensure that a function from another package is available by attaching the other package to the main search path (i.e. the list of environments returned by search()). This strategy can, however, be thwarted if another package, loaded later, places a...
Android basics: running code in the UI thread
...
Also note that AsyncTask.execute() requires you to call from the UI thread anyway, which renders this option useless for the use case of simply running code on the UI thread from a background thread unless you move all of your background work into doInBackground() and use AsyncTas...
Xml Namespace breaking my xpath! [duplicate]
...ve the following xPath:
/List/Fields/Field
When I remove the xmlns from my XML
the xPath works fine. When it's in
there my xPath finds nothing
If you cannot register a namespace binding and cannot use (assuming the registered prefix is "x"):
/x:List/x:Fields/x:Field
then there is an...
What is the difference between double-ampersand (&&) and semicolon (;) in Linux Bash?
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is the double ampersand && different from a single ampersand & in bash?
– Charlie Parker
Jan 16 '17 at 21:40
16
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How to do a LIKE query in Arel and Rails?
...if you only wanted a one-sided wildcard, there's nothing stopping the user from submitting a query value that includes % at both ends (I know that in practice, Rails prevents % from showing up in a query string, but it seems like there should be protection against this at the ActiveRecord level).
...
Check if something is (not) in a list in Python
...your list, python will have scanned the list upto the end. This is evident from the timings below:
l = list(range(100001))
s = set(l)
%timeit 100000 in l
%timeit 100000 in s
2.58 ms ± 58.9 µs per loop (mean ± std. dev. of 7 runs, 100 loops each)
101 ns ± 9.53 ns per loop (mean ± std. dev. of...
URLEncoder not able to translate space character
... implements the HTML Specifications for how to encode URLs in HTML forms.
From the javadocs:
This class contains static methods for
converting a String to the
application/x-www-form-urlencoded MIME
format.
and from the HTML Specification:
application/x-www-form-urlencoded
For...
Adding iOS UITableView HeaderView (not section header)
... set the table view footer, just know that it will also remove extra cells from tableview.
let cellTableViewFooter = tableView.dequeueReusableCellWithIdentifier(TableViewController.tableViewFooterCustomCellIdentifier) as! UITableViewCell
cellTableViewFooter.frame = CGRectMake(0, 0, self.tabl...
How to maintain a Unique List in Java?
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You can use a Set implementation:
Some info from the JAVADoc:
A collection that contains no duplicate elements. More formally, sets contain no pair of elements e1 and e2 such that e1.equals(e2), and at most one null element. As implied by its name, this interface m...
What's the difference between process.cwd() vs __dirname?
...
process.cwd() returns the current working directory,
i.e. the directory from which you invoked the node command.
__dirname returns the directory name of the directory containing the JavaScript source code file
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