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How do I SET the GOPATH environment variable on Ubuntu? What file must I edit?
...ead of $HOME/go in my sample.
export GOPATH=$HOME/go
export PATH=$PATH:$GOROOT/bin:$GOPATH/bin
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Python: Select subset from list based on index set
...ecause this will be very familiar syntax to users of R, where this kind of selection is very powerful, especially when nested and/or multidimensional.
– Thomas Browne
May 25 '14 at 21:11
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How do I determine whether my calculation of pi is accurate?
...cos(x) as a black box (e.g. you could use taylor series as above) is to do root finding via Newton. There certainly are better algorithms out there, but if you don't want to verify tons of digits this should suffice (and it's not that tricky to implement, and you only need a bit of calculus to unde...
How do I extract a sub-hash from a hash?
...e same:
h1 = {:a => :A, :b => :B, :c => :C, :d => :D}
h2 = h1.select {|key, value| [:b, :d, :e, :f].include?(key) } # => {:b=>:B, :d=>:D}
h1 = Hash[h1.to_a - h2.to_a] # => {:a=>:A, :c=>:C}
And if you want to patch that into the Hash class:
class Hash
def extract...
How are POST and GET variables handled in Python?
...t('SCRIPT_NAME') which provides the path to the script from the web host's root folder (eg: /cgi-bin/cgi.py). In my case, QUERY_STRING is blank, as I am using POST.
– NuclearPeon
Jul 7 '14 at 20:52
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AngularJS $http and $resource
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I feel that other answers, while correct, don't quite explain the root of the question: REST is a subset of HTTP. This means everything that can be done via REST can be done via HTTP but not everything that can be done via HTTP can be done via REST. That is why $resource uses $http internal...
How do I get the collection of Model State Errors in ASP.NET MVC?
...he ModelState, use this Linq:
var modelStateErrors = this.ModelState.Keys.SelectMany(key => this.ModelState[key].Errors);
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When to use a linked list over an array/array list?
... in array. It is constant time to add/remove from a linked list’s head / root node.
– Yawar Murtaza
Jan 8 '19 at 10:37
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What's the difference between IQueryable and IEnumerable
...to execute the entire query against the underlying data source (like using SELECT TOP 1 in SQL).
See:
The .NET Standard Query Operators
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How to automate createsuperuser on django?
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It should be in your migrations folder, e.g root/mysite/myapp/migrations - if your read the docs, it explains how you can create an empty migration and modify that python manage.py makemigrations --empty yourappname
– Hendrik F
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