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When should I use the HashSet type?

... Here's a real example of where I use a HashSet<string>: Part of my syntax highlighter for UnrealScript files is a new feature that highlights Doxygen-style comments. I need to be able to tell if a @ or \ command is valid to determine whether to show it in gray (valid)...
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How to create PDFs in an Android app? [closed]

....5.0.jar), (3) XMLWorker (xmlworker-5.5.1.jar). public boolean createPDF(String rawHTML, String fileName, ContextWrapper context){ final String APPLICATION_PACKAGE_NAME = context.getBaseContext().getPackageName(); File path = new File( Environment.getExternalStorageDirectory(), APPLICATION...
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Efficient list of unique strings C#

What is the most efficient way to store a list of strings ignoring any duplicates? I was thinking a dictionary may be best inserting strings by writing dict[str] = false; and enumerating through the keys as a list. Is that a good solution? ...
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Static Vs. Dynamic Binding in Java

...le in Java public class StaticBindingTest { public static void main(String args[]) { Collection c = new HashSet(); StaticBindingTest et = new StaticBindingTest(); et.sort(c); } //overloaded method takes Collection argument public Collection sort(Collection ...
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How to check for file lock? [duplicate]

...lar problem, I finished with the following code: public bool IsFileLocked(string filePath) { try { using (File.Open(filePath, FileMode.Open)){} } catch (IOException e) { var errorCode = Marshal.GetHRForException(e) & ((1 << 16) - 1); return err...
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Kotlin: how to pass a function as parameter to another?

... Use :: to signify a function reference, and then: fun foo(m: String, bar: (m: String) -> Unit) { bar(m) } // my function to pass into the other fun buz(m: String) { println("another message: $m") } // someone passing buz into foo fun something() { foo("hi", ::buz) } ...
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In javascript, is an empty string always false as a boolean?

...this behavior: ToBoolean The result is false if the argument is the empty String (its length is zero); otherwise the result is true Quote taken from http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-262.pdf ...
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Android read text raw resource file

...redReader reader = new BufferedReader(new InputStreamReader(inputStream)); String line = reader.readLine(); while (line != null) { ... } Don't forget that readLine() skips the new-lines! share | i...
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“Server” vs “Data Source” in connection string

... SqlLocalDb installed to work locally. Good, but I can see two connection strings typically and both works: 4 Answers ...
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Getting the application's directory from a WPF application

... You can also use the first argument of the command line arguments: String exePath = System.Environment.GetCommandLineArgs()[0] share | improve this answer | follow ...