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How do I append text to a file?

...ther source. Or else entered at the keyboard, doesn't matter. ^D Essentially, you can dump any text you want into the file. CTRL-D sends an end-of-file signal, which terminates input and returns you to the shell. share ...
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In Swift how to call method with parameters on GCD main thread?

...() + 0.1) { // your code here } Older versions of Swift used: dispatch_async(dispatch_get_main_queue(), { let delegateObj = UIApplication.sharedApplication().delegate as YourAppDelegateClass delegateObj.addUIImage("yourstring") }) ...
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Citing the author of a blockquote using Markdown syntax

...ld like to have the quote followed by a citation beneath it, but right now all it does is blockquote the whole line. How does one do this in markdown syntax? ...
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HintPath vs ReferencePath in Visual Studio

...mit to a convention where dependency DLLs are in a "releases" svn repo and all projects point to a particular release. Since different developers have different folder structures, relative references won't work, so we came up with a scheme to use an environment variable pointing to the particular de...
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Best way to pretty print a hash

... require 'pp' pp my_hash Use pp if you need a built-in solution and just want reasonable line breaks. Use awesome_print if you can install a gem. (Depending on your users, you may wish to use the index:false option to turn off displaying arr...
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How to explain callbacks in plain english? How are they different from calling one function from ano

How to explain callbacks in plain English? How are they different from calling one function from another function taking some context from the calling function? How can their power be explained to a novice programmer? ...
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How can I use a search engine to search for special characters? [closed]

...ace before it, in which case it is a negative sign.) The underscore symbol _ is not ignored when it connects two words, e.g. [ quick_sort ]. As such, it is not well suited for these types of searchs. Google Code however does have syntax for searching through their code projects, that includes a ro...
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How to dismiss keyboard iOS programmatically when pressing return

...s delegate to current viewcontroller and then: func textFieldShouldReturn(_ textField: UITextField) -> Bool { textField.resignFirstResponder() return true } Objective-C: [self.view endEditing:YES]; or Set text field's delegate to current viewcontroller and then: - (BOOL)textFie...
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overlay opaque div over youtube iframe

...text/html" width="520" height="330" src="http://www.youtube.com/embed/NWHfY_lvKIQ?wmode=opaque" frameborder="0"></iframe> share | improve this answer | follow ...
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How does having a dynamic variable affect performance?

...Generator(); if (!method.IsStatic) { il.Emit(OpCodes.Ldarg_0); il.Emit(OpCodes.Unbox_Any, method.DeclaringType); } var parameters = method.GetParameters(); for (int i = 0; i < parameters.Length; i++) { il.Emit(OpCodes.Ldarg_1); il.Emit(OpCo...