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How can I assign the output of a function to a variable using bash?
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VAR=$(scan)
Exactly the same way as for programs.
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How do I install from a local cache with pip?
... take advantage of this, I've added the following to my ~/.bash_profile:
export PIP_DOWNLOAD_CACHE=$HOME/.pip_download_cache
or, if you are on a Mac:
export PIP_DOWNLOAD_CACHE=$HOME/Library/Caches/pip-downloads
Notes
If a newer version of a package is detected, it will be downloaded and adde...
How to select only the records with the highest date in LINQ
... n by n.AccountId into g
select new {AccountId = g.Key, Date = g.Max(t=>t.Date)};
If you want the whole record:
var q = from n in table
group n by n.AccountId into g
select g.OrderByDescending(t=>t.Date).FirstOrDefault();
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What is Double Brace initialization in Java?
What is Double Brace initialization syntax ( {{ ... }} ) in Java?
13 Answers
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Default value of BOOL
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There is no default value if you write
-(void)somemethod {
BOOL x; // <--- no default value
It is initialized to garbage.
However, for a BOOL ivar, it will be initialized to NO, as the whole instance is filled with 0 on initialization.
(Note: When ARC is enabled, local object poin...
CORS - How do 'preflight' an httprequest?
...o acknowledge these headers in order for the actual request to work.
For example, suppose the browser makes a request with the following headers:
Origin: http://yourdomain.com
Access-Control-Request-Method: POST
Access-Control-Request-Headers: X-Custom-Header
Your server should then respond with...
What is self-documenting code and can it replace well documented code? [closed]
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How does functools partial do what it does?
...yword args support etc):
def partial(func, *part_args):
def wrapper(*extra_args):
args = list(part_args)
args.extend(extra_args)
return func(*args)
return wrapper
So, by calling partial(sum2, 4) you create a new function (a callable, to be precise) that behaves li...
What’s the difference between “Array()” and “[]” while declaring a JavaScript array?
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There is a difference, but there is no difference in that example.
Using the more verbose method: new Array() does have one extra option in the parameters: if you pass a number to the constructor, you will get an array of that length:
x = new Array(5);
alert(x.length); // 5
To il...
How can I update NodeJS and NPM to the next versions?
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