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Where do I find the line number in the Xcode editor?
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For Xcode 4 and higher, open the preferences (command+,) and check "Show: Line numbers" in the "Text Editing" section.
Xcode 9
XCode 8 and below
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What is the dual table in Oracle?
I've heard people referring to this table and was not sure what it was about.
14 Answers
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Prevent segue in prepareForSegue method?
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It's possible in iOS 6 and later:
You have to implement the method
- (BOOL)shouldPerformSegueWithIdentifier:(NSString *)identifier sender:(id)sender
In your view controller. You do your validation there, and if it's OK then return YES; if it's...
How do I apply a diff patch on Windows?
...ng a heck of a time trying to apply one. I'm trying to distribute a patch, and I got a question from a user about how to apply it. So I tried to figure it out on my own and found out that I have no clue, and most of the tools I can find are command-line. (I can handle a command line, but a lot of pe...
At runtime, find all classes in a Java application that extend a base class
...ns. I mistakenly figured this would be as easy as it is in the .Net world and this answer has saved me a lot of time.
– akmad
Oct 1 '12 at 19:55
1
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Input with display:block is not a block, why not?
...hy does display:block;width:auto; on my text input not behave like a div and fill the container width?
7 Answers
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What Content-Type value should I send for my XML sitemap?
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The difference between text/xml and application/xml is the default character encoding if the charset parameter is omitted:
Text/xml and application/xml behave differently when the charset
parameter is not explicitly specified. If the default charset ...
How to find if a native DLL file is compiled as x64 or x86?
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You can use DUMPBIN too. Use the /headers or /all flag and its the first file header listed.
dumpbin /headers cv210.dll
64-bit
Microsoft (R) COFF/PE Dumper Version 10.00.30319.01
Copyright (C) Microsoft Corporation. All rights reserved.
Dump of file cv210.dll
PE signature...
@selector() in Swift?
... chaining on protocol types or is/as tests instead of respondsToSelector:, and use closures wherever you can instead of performSelector: for better type/memory safety.)
But there are still a number of important ObjC-based APIs that use selectors, including timers and the target/action pattern. Swift...
Setting up maven dependency for SQL Server
...ernate access to SQL Server database. I set up maven dependencies for it and try to find out SQL Server connector on the same way I know MySql has it.
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