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What is polymorphism, what is it for, and how is it used?
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edited Sep 14 '19 at 16:23
Maciej Lipinski
18766 silver badges1010 bronze badges
answered ...
How to check if a file exists in the Documents directory in Swift?
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Swift 4.x version
let path = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0] as String
let url = NSURL(fileURLWithPath: path)
if let pathComponent = url.appendingPathComponent("nameOfF...
How does one capture a Mac's command key via JavaScript?
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246
EDIT: As of 2019, e.metaKey is supported on all major browsers as per the MDN.
Note that on Wi...
Error Domain=NSURLErrorDomain Code=-1005 “The network connection was lost.”
...Beta1 and Xcode6-Beta2 with both iOS7 and iOS8. But with Xcode6-Beta3, Beta4, Beta5 I'm facing network issues with iOS8 but everything works fine on iOS7. I get the error "The network connection was lost." . The error is as follows:
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How to select the nth row in a SQL database table?
...site linked above since I never use those DBs)
Update: As of PostgreSQL 8.4 the standard windowing functions are supported, so expect the second example to work for PostgreSQL as well.
Update: SQLite added window functions support in version 3.25.0 on 2018-09-15 so both forms also work in SQLite.
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append to url and refresh page
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Shlomi KomemiShlomi Komemi
4,82533 gold badges2525 silver badges3939 bronze badges
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keytool error :java.io.IoException:Incorrect AVA format
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486
Probably you entered illegal character(something like ,(comma)) in a field for Name, Organizat...
Can we call the function written in one JavaScript in another JS file?
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edited Nov 14 '18 at 15:17
Nick Suwyn
43155 silver badges2020 bronze badges
answered Sep 2...
ImportError: No module named MySQLdb
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answered Mar 7 '14 at 14:36
DazWorrallDazWorrall
10.7k22 gold badges3737 silver badges3232 bronze badges
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Searching if value exists in a list of objects using Linq
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471
LINQ defines an extension method that is perfect for solving this exact problem:
using System...