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Find first element in a sequence that matches a predicate
...ches a predicate:
next(x for x in seq if predicate(x))
Or (itertools.ifilter on Python 2):
next(filter(predicate, seq))
It raises StopIteration if there is none.
To return None if there is no such element:
next((x for x in seq if predicate(x)), None)
Or:
next(filter(predicate, seq), Non...
How do you remove a Cookie in a Java Servlet
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In my environment, following code works. Although looks redundant at first glance, cookies[i].setValue(""); and cookies[i].setPath("/"); are necessary to clear the cookie properly.
private void eraseCookie(HttpServletRequest req, HttpServletResponse resp) {
...
Create a unique number with javascript time
...estamp = now.getFullYear().toString(); // 2011
timestamp += (now.getMonth < 9 ? '0' : '') + now.getMonth().toString(); // JS months are 0-based, so +1 and pad with 0's
timestamp += ((now.getDate < 10) ? '0' : '') + now.getDate().toString(); // pad with a 0
... etc... with .getHours(), getMinut...
Best way to show a loading/progress indicator?
...ndroid/app/ProgressDialog.html
I include a ProgressBar in my layout
<ProgressBar
android:layout_weight="1"
android:id="@+id/progressBar_cyclic"
android:visibility="gone"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
...
Alter column, add default constraint
...nd one of the columns is "Date" of type datetime. We decided to add a default constraint to that column
6 Answers
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Which characters are valid/invalid in a JSON key name?
...meaning\" of life":42}
There is perhaps a chance you'll encounter difficulties loading such values into some languages, which try to associate keys with object field names. I don't know of any such cases, however.
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Difference between 'struct' and 'typedef struct' in C++?
...the program in
Listing 1. This program defines a
class foo with a default constructor,
and a conversion operator that
converts a foo object to char const *.
The expression
p = foo();
in main should construct a foo object
and apply the conversion operator. The
subsequent output s...
Hibernate Annotations - Which is better, field or property access?
...cks against passwordHash and then updates failedAttempts and returns a result. No need for other code to ever access those two fields.
– Martin
Sep 29 '15 at 14:11
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How to implement a confirmation (yes/no) DialogPreference?
... look things up.
Here is a short example of how an alert dialog can be built.
new AlertDialog.Builder(this)
.setTitle("Title")
.setMessage("Do you really want to whatever?")
.setIcon(android.R.drawable.ic_dialog_alert)
.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() ...
List all the files that ever existed in a Git repository
...tunity to get things right.
git log --pretty=format: --name-only --diff-filter=A | sort -u
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