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String concatenation: concat() vs “+” operator

... Code: 0: new #2; //class java/lang/StringBuilder 3: dup 4: invokespecial #3; //Method java/lang/StringBuilder."<init>":()V 7: aload_1 8: invokevirtual #4; //Method java/lang/StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder; 11: aload_2 ...
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Java heap terminology: young, old and permanent generations?

... Hearen 5,47522 gold badges3232 silver badges4545 bronze badges answered Jan 24 '10 at 23:02 Joshua McKinnonJos...
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Permission is only granted to system app

... | edited Aug 14 '16 at 18:21 Ameer 2,59711 gold badge2525 silver badges4141 bronze badges an...
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How do I find the .NET version?

... or else if you have the .NET framework SDK, then the SDK Command prompt. 4. wmic product get description | findstr /C:".NET Framework" 5. dir /b /ad /o-n %systemroot%\Microsoft.NET\Framework\v?.* The last command (5) will list out all the versions (except 4.5) of .NET installed, latest first. Yo...
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How to add an empty column to a dataframe?

... 463 If I understand correctly, assignment should fill: >>> import numpy as np >>&g...
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How to prettyprint a JSON file?

...arsed = json.loads(your_json) >>> print(json.dumps(parsed, indent=4, sort_keys=True)) [ "foo", { "bar": [ "baz", null, 1.0, 2 ] } ] To parse a file, use json.load(): with open('filename.txt', 'r') as handle: ...
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vim line numbers - how to have them on by default?

... 471 Add set number to your .vimrc file in your home directory. If the .vimrc file is not in your h...
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VBoxManage: error: Failed to create the host-only adapter

I am running vagrant 1.4 and virtual box 4.3 on fedora 17 machine. When I do "vagrant up", I get this error: 32 Answers...
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Do Swift-based applications work on OS X 10.9/iOS 7 and lower?

...el(frame: CGRectMake(0, 0, 200, 21)) label.center = CGPointMake(160, 284) label.textAlignment = NSTextAlignment.Center label.text = "I'am a test label" controller.view.addSubview(label) self.window!.rootViewController = controller self.window!.makeKeyAndVisible() return ...
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When should I create a destructor?

... answered Feb 4 '11 at 15:20 Eric LippertEric Lippert 599k164164 gold badges11551155 silver badges20142014 bronze badges ...