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Why there is no ConcurrentHashSet against ConcurrentHashMap
...t a concurrent hash set view via ConcurrentHashMap.newKeySet(). This is a bit simpler than the old newSetFromMap which required you to pass in an empty map object. But it is specific to ConcurrentHashMap.
Anyway, the Java designers could have created a new set interface every time a new map interfa...
How do I check if a property exists on a dynamic anonymous type in c#?
...null;
}
var settings = new {Filename = @"c:\temp\q.txt"};
Console.WriteLine(IsPropertyExist(settings, "Filename"));
Console.WriteLine(IsPropertyExist(settings, "Size"));
Output:
True
False
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How can I test an AngularJS service from the console?
...ing them to components).
To get the injector of your app you need to grab it from an element that angular is handling. For example if your app is registered on the body element you call injector = angular.element(document.body).injector()
From the retrieved injector you can then get whatever servi...
How to change the output color of echo in Linux
...ple 1;35
Cyan 0;36 Light Cyan 1;36
Light Gray 0;37 White 1;37
And then use them like this in your script:
# .---------- constant part!
# vvvv vvvv-- the code from above
RED='\033[0;31m'
NC='\033[0m' # No Color
printf "I ${RED}love${NC} Stack Overflow\n"
which...
Unable to begin a distributed transaction
...
Found it, MSDTC on the remote server was a clone of the local server.
From the Windows Application Events Log:
Event Type: Error
Event Source: MSDTC
Event Category: CM
Event ID: 4101
Date: 9/19/2011
Time: 1:...
Find first element by predicate
I've just started playing with Java 8 lambdas and I'm trying to implement some of the things that I'm used to in functional languages.
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How to add a custom button state
For instance, the default button has the following dependencies between its states and background images:
3 Answers
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Call Javascript function from URL/address bar
Is it possible to call a javascript function from the URL? I am basically trying to leverage JS methods in a page I don't have access to the source.
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How do you do relative time in Rails?
I'm writing a Rails application, but can't seem to find how to do relative time, i.e. if given a certain Time class, it can calculate "30 seconds ago" or "2 days ago" or if it's longer than a month "9/1/2008", etc.
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JavaScript equivalent to printf/String.Format
...follow
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edited Jan 31 '19 at 19:07
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