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What guarantees are there on the run-time complexity (Big-O) of LINQ methods?
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@MarceloCantos Why arrays aren't handled ? It is same for ElementAtOrDefault method referencesource.microsoft.com/#System.Core/System/Linq/…
– Freshblood
Dec 11 '15 at 11:53
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How to get parameters from the URL with JSP
... name to a single value
paramValues: Maps a request parameter name to an array of values
header: Maps a request header name to a single value
headerValues: Maps a request header name to an array of values
cookie: Maps a cookie name to a single cookie
initParam: Maps a context initializatio...
Get list from pandas DataFrame column headers
...ns.values.tolist()
.columns returns an Index, .columns.values returns an array and this has a helper function .tolist to return a list.
If performance is not as important to you, Index objects define a .tolist() method that you can call directly:
my_dataframe.columns.tolist()
The difference in...
Difference between Observer, Pub/Sub, and Data Binding
...r UI views correspondingly.
But the Cons are Observables only maintain one array for keeping observers
(in the example, the array is observersList).
It does NOT differentiate how the update is triggered because it only has one notify function, which triggers all the functions stored in that array.
I...
How to use a switch case 'or' in PHP
...range(1, 100);
$r2 = range(100, 200);
$v = 76;
switch (true) {
case in_array($v, $r1) :
echo 'the value is in range 1 to 100';
break;
case in_array($v, $r2) :
echo 'the value is in range 100 to 200';
break;
}
...
Extending Angular Directive
...rst argument, then we retrieve it from the callback parameter (which is an array of directives matching that name).
Once we got it, we can obtain its scope object and extend it as needed. Notice that all of this has to be done in the config block.
Some notes
It has been suggested to simply add a...
What does send() do in Ruby?
... if you need to read attributes on an object.
For example, if you have an array of strings, if you try to iterate through them and call them on your object, it won't work.
atts = ['name', 'description']
@project = Project.first
atts.each do |a|
puts @project.a
end
# => NoMethodError: undefine...
Weird PHP error: 'Can't use function return value in write context'
...thx man! Now, if the parser would say "I expected square brackets after an array variable's name, duh!", it would sound much cooler than "Can't use function return value in write context." I might submit that to the PHP guys as a suggestion.
– Joe Völker
Dec 2...
form_for with nested resources
...orm_for([@post, @comment]) do |f| %>
Be sure to explicitly define the array in the form_for, not just comma separated like you have above.
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Check if a Windows service exists and delete in PowerShell
... error if
# the service didn't exist. Trick Get-Service to return an array of
# Services, but only if the name exactly matches the $ServiceName.
# This way you can test if the array is emply.
if ( Get-Service "$ServiceName*" -Include $ServiceName ) {
$Return = $True
...