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Is there any difference between the `:key => “value”` and `key: “value”` hash notations?
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Both Perl and PHP use =>. I'd guess that Ruby, being heavily inspired by Perl, borrowed the syntax from Perl :)
– Daniel Serodio
Aug 7 '17 at 19:19
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Can't pickle when using multiprocessing Pool.map()
...code is pickling and unpickling in a loop, due to slight changes I made in order to make Steven's code OO'd?
– ventolin
Nov 30 '09 at 2:08
1
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ASP.NET MVC - Attaching an entity of type 'MODELNAME' failed because another entity of the same type
...ified stamp and row version on my entities, so I was getting them first in order to compare with the inbound headers. Of course, this loaded and tracked the entity that was subsequently being updated.
The fix was simply to change the repository from newing-up a context once in the constructor to ha...
Chrome DevTools Devices does not detect device when plugged in
...single ADB package it required https://forum.xda-developers.com/showthread.php?t=2317790)
Use command prompt to run ADB, in cmd go to the install directory of the ADB tools and type:
adb.exe (might need to start and stop ADB using adb kill-server and adb start-server)
Connect phone and browse to abo...
How to get an array of unique values from an array containing duplicates in JavaScript? [duplicate]
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If you want to maintain order:
arr = arr.reverse().filter(function (e, i, arr) {
return arr.indexOf(e, i+1) === -1;
}).reverse();
Since there's no built-in reverse indexof, I reverse the array, filter out duplicates, then re-reverse it.
The ...
Macro vs Function in C
...ator though... overlooked that... But it might still be less readable.)
Order of Operations: (courtesy of @ouah)
#define min(a,b) (a < b ? a : b)
min(x & 0xFF, 42)
gets expanded to:
(x & 0xFF < 42 ? x & 0xFF : 42)
But & has lower precedence than <. So 0xFF < 42 ...
Concurrent HashSet in .NET Framework?
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@Ralf Well, it's a set, not a list, as it's unordered.
– Servy
Sep 20 '13 at 18:18
11
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How do I sort strings alphabetically while accounting for value when a string is numeric?
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Pass a custom comparer into OrderBy. Enumerable.OrderBy will let you specify any comparer you like.
This is one way to do that:
void Main()
{
string[] things = new string[] { "paul", "bob", "lauren", "007", "90", "101"};
foreach (var thing in...
Property getters and setters
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In order to override setter and getter for swift variables use the below given code
var temX : Int?
var x: Int?{
set(newX){
temX = newX
}
get{
return temX
}
}
We need to keep the value of va...
How to set the prototype of a JavaScript object that has already been instantiated?
...mutability means implementations must check for cyclic prototype chains in order to avoid ilooping. [constant checks for infinite recursion are required]
Finally, mutating __proto__ on an existing object may break non-generic methods in the new prototype object, which cannot possibly work on th...