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Type definition in object literal in TypeScript
...
Update 2019-05-15 (Improved Code Pattern as Alternative)
After many years of using const and benefiting from more functional code, I would recommend against using the below in most cases. (When building objects, forcing the type system into a specific type instead of l...
How to copy a file from one directory to another using PHP?
...
You can copy and past this will help you
<?php
$file = '/test1/example.txt';
$newfile = '/test2/example.txt';
if(!copy($file,$newfile)){
echo "failed to copy $file";
}
else{
echo "copied $file into $newfile\n";
}
?>
...
How does deriving work in Haskell?
...ame
gen_render :: Name -> Q [Dec]
gen_render typName =
do (TyConI d) <- reify typName -- Get all the information on the type
(type_name,_,_,constructors) <- typeInfo (return d) -- extract name and constructors
i_dec <- gen_instance (mkName "TH_Render") (conT...
Git commit in terminal opens VIM, but can't get back to terminal
... your work and exit press Esc and then :wq (w for write and q for quit).
Alternatively, you could both save and exit by pressing Esc and then :x
To set another editor run export EDITOR=myFavoriteEdioron your terminal, where myFavoriteEdior can be vi, gedit, subl(for sublime) etc.
...
Why does Enumerable.All return true for an empty sequence? [duplicate]
...you think of All as being like a logical "and" between the predicate's results for each element. The true you're getting out for the empty sequence is the identity element of the "and" operation. Likewise, the false you get from Any for the empty sequence is the identity for logical "or".
If you t...
How to check internet access on Android? InetAddress never times out
...uld probably not be the talk of the day.
Which permissions are required?
<uses-permission android:name="android.permission.INTERNET" />
Just internet access - surprise ^^ (Btw have you ever thought about, how some of the methods suggested here could even have a remote glue about internet ac...
Unable to modify ArrayAdapter in ListView: UnsupportedOperationException
...a AbstractList (List) which cannot be modified.
Solution
Use an ArrayList<String> instead using an array while initializing the ArrayAdapter.
String[] array = {"a","b","c","d","e","f","g"};
ArrayList<String> lst = new ArrayList<String>(Arrays.asList(array));
final ArrayAdapter&l...
If strings are immutable in .NET, then why does Substring take O(n) time?
...ompletely irrelevant.
The long answer is:
An immutable data structure built such that operations on an instance permit re-use of the memory of the original with only a small amount (typically O(1) or O(lg n)) of copying or new allocation is called a "persistent" immutable data structure. Strings i...
What's the difference between a Python “property” and “attribute”?
... is the setter method
where I can check it's not assigned a value < 0
"""
if value < 0:
raise ValueError("Must be >= 0")
self._x = value
>>> a = A()
>>> a._x = -1
>>> a.x = -1
Traceback (most recent call last):
File "...
How to use my view helpers in my ActionMailer views?
...ailer class that you are using to manage your emails:
class ReportMailer < ActionMailer::Base
add_template_helper(AnnotationsHelper)
...
end
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