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DateTime vs DateTimeOffset
Currently, we have a standard way of dealing with .NET DateTime 's in a TimeZone aware way: Whenever we produce a DateTime we do it in UTC (e.g. using DateTime.UtcNow ), and whenever we display one, we convert back from UTC to the user's local time.
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applicationWillEnterForeground vs. applicationDidBecomeActive, applicationWillResignActive vs. appli
...o the background, while applicationDidBecomeActive: may be called multiple times after launch. This makes applicationWillEnterForeground: ideal for setup that needs to occur just once after relaunch.
applicationWillEnterForeground: is called:
when app is relaunched
before applicationDidBecomeAc...
Importing variables from another file?
...mport x1
print(x1)
and
import file1
print(file1.x1)
Altough at import time x1 and file1.x1 have the same value, they are not the same variables. For instance, call a function in file1 that modifies x1 and then try to print the variable from the main file: you will not see the modified value.
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How can I use a file in a command and redirect output to the same file without truncating it?
...ash processes the redirections first, then executes the command. So by the time grep looks at file_name, it is already empty. You can use a temporary file though.
#!/bin/sh
tmpfile=$(mktemp)
grep -v 'seg[0-9]\{1,\}\.[0-9]\{1\}' file_name > ${tmpfile}
cat ${tmpfile} > file_name
rm -f ${tmpfile...
Twitter Bootstrap 3: how to use media queries?
...t, @screen-desktop, and @screen-lg-desktop have been deprecated. Might be time to update your already-awesome answer. ;-)
– Slipp D. Thompson
Nov 3 '14 at 11:49
2
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Iterate a list as pair (current, next) in Python
I sometimes need to iterate a list in Python looking at the "current" element and the "next" element. I have, till now, done so with code like:
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How to add google chrome omnibox-search support for your site?
... Adding search engines at chrome://settings/searchEngines is a time saver! Thanks!
– Esdras Lopez
Apr 2 '18 at 22:30
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SharedPreferences.onSharedPreferenceChangeListener not being called consistently
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this accepted answer is ok, as for me it is creating new instance each time the activity resumes
so how about keeping the reference to the listener within the activity
OnSharedPreferenceChangeListener myPrefListner = new OnSharedPreferenceChangeListener(){
public void onSharedPreferenceC...
Creating instance of type without default constructor in C# using reflection
...g System.Linq;
using System.Text;
using System.Reflection;
using System.Runtime.Serialization;
namespace NoConstructorThingy
{
class Program
{
static void Main(string[] args)
{
MyClass myClass = (MyClass)FormatterServices.GetUninitializedObject(typeof(MyClass)); ...
What does the plus sign do in '+new Date'
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But like why wouldn't you use the defined getTime method on the date object?!
– tkone
Aug 23 '12 at 21:36
31
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