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ViewPager and fragments — what's the right way to store fragment's state?
... separation of UI logic into some modules. But along with ViewPager its lifecycle is still misty to me. So Guru thoughts are badly needed!
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How to check whether a file or directory exists?
...s
func exists(path string) (bool, error) {
_, err := os.Stat(path)
if err == nil { return true, nil }
if os.IsNotExist(err) { return false, nil }
return false, err
}
Edited to add error handling.
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delete vs delete[] operators in C++
What is the difference between delete and delete[] operators in C++?
7 Answers
7
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How do I check if a string is valid JSON in Python?
In Python, is there a way to check if a string is valid JSON before trying to parse it?
4 Answers
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How to get a substring between two strings in PHP?
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If the strings are different (ie: [foo] & [/foo]), take a look at this post from Justin Cook.
I copy his code below:
function get_string_between($string, $start, $end){
$string = ' ' . $string;
$ini = strpos($str...
Ask for User Permission to Receive UILocalNotifications in iOS 8
I have set up local notifications in the App Delegate Using this:
5 Answers
5
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What is the meaning of addToBackStack with null parameter?
...n and bring back the
previous fragment by pressing the Back button.
If you add multiple changes to the transaction (such as another add()
or remove()) and call addToBackStack(), then all changes applied
before you call commit() are added to the back stack as a single
transaction and the...
Update value of a nested dictionary of varying depth
...port collections
def update(d, u):
for k, v in u.iteritems():
if isinstance(v, collections.Mapping):
d[k] = update(d.get(k, {}), v)
else:
d[k] = v
return d
Python 3:
import collections.abc
def update(d, u):
for k, v in u.items():
if is...
Optimal settings for exporting SVGs for the web from Illustrator?
...ll of the SVG 1.2 Tiny content that Illustrator produces too.
Fonts note: if you don't have any text in your image this setting doesn't matter.
Adobe CEF: never use this option of you intend to display it in browsers. It's Adobe's way of embedding fonts in SVG files, as far as I know this is only...
Java null check why use == instead of .equals()
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They're two completely different things. == compares the object reference, if any, contained by a variable. .equals() checks to see if two objects are equal according to their contract for what equality means. It's entirely possible for two distinct...