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how to get the one entry from hashmap without iterating

...ution is to use TreeMap (you asked for other data structures). TreeMap<String, String> myMap = new TreeMap<String, String>(); String first = myMap.firstEntry().getValue(); String firstOther = myMap.get(myMap.firstKey()); TreeMap has an overhead so HashMap is faster, but just as an exa...
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How to remove time portion of date in C# in DateTime object only?

...bly have the date in following format in object form not in the form of string . 38 Answers ...
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How to convert date to timestamp?

... Split the string into its parts and provide them directly to the Date constructor: Update: var myDate = "26-02-2012"; myDate = myDate.split("-"); var newDate = new Date( myDate[2], myDate[1] - 1, myDate[0]); console.log(newDate.get...
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Is there a way to check if a file is in use?

... || errorCode == ERROR_LOCK_VIOLATION; } internal static bool CanReadFile(string filePath) { //Try-Catch so we dont crash the program and can check the exception try { //The "using" is important because FileStream implements IDisposable and //"using" will avoid a heap exhaus...
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Can't specify the 'async' modifier on the 'Main' method of a console app

... identical usage: using Nito.AsyncEx; class Program { static void Main(string[] args) { AsyncContext.Run(() => MainAsync(args)); } static async void MainAsync(string[] args) { Bootstrapper bs = new Bootstrapper(); var list = await bs.GetList(); } }...
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What is the best way to iterate over a dictionary?

... foreach(KeyValuePair<string, string> entry in myDictionary) { // do something with entry.Value or entry.Key } share | improve this answe...
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Get first key in a (possibly) associative array?

...another newly created array, and requesting the first key of an array as a string. – Blixt Sep 4 '09 at 6:33 3 ...
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How do you get a string to a character array in JavaScript?

How do you convert a string to a character array in JavaScript? 13 Answers 13 ...
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C# 4.0 optional out/ref arguments

...ters, and which just calls your current method. public bool SomeMethod(out string input) { ... } // new overload public bool SomeMethod() { string temp; return SomeMethod(out temp); } If you have C# 7.0, you can simplify: // new overload public bool SomeMethod() { return SomeMetho...
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Accessing a Dictionary.Keys Key through a numeric index

I'm using a Dictionary<string, int> where the int is a count of the key. 15 Answers ...