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Get keys from HashMap in Java

... private Map<String, Integer> _map= new HashMap<String, Integer>(); Iterator<Map.Entry<String,Integer>> itr= _map.entrySet().iterator(); //please check while(itr.hasNext()) { ...
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Google Guava vs. Apache Commons [closed]

...sion 4 uses generics. commons.apache.org/proper/commons-collections/release_4_0.html – Abdull Jul 10 '13 at 1:28 add a comment  |  ...
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Time complexity of Sieve of Eratosthenes algorithm

...cause we need an array of n elements in any case? – a_123 Mar 25 '16 at 21:35 ...
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Lambda function in list comprehensions

...rent copies of the squaring function, see: >>> [lambda x: x*x for _ in range(3)] [<function <lambda> at 0x00000000023AD438>, <function <lambda> at 0x00000000023AD4A8>, <function <lambda> at 0x00000000023AD3C8>] Note the memory addresses of the lambdas - ...
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What is the “right” way to iterate through an array in Ruby?

...nts giving you the value and the index: array = ["A", "B", "C"] array.each_with_index {|val, index| puts "#{val} => #{index}" } Prints: A => 0 B => 1 C => 2 I'm not quite sure from your question which one you are looking for. ...
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SignalR - Sending a message to a specific user using (IUserIdProvider) *NEW 2.0.0*

...>(); Next. Add the claims during user registration. var result = await _userManager.CreateAsync(user, Model.Password); if (result.Succeeded) { await _userManager.AddClaimAsync(user, new Claim(ClaimTypes.Email, Model.Email)); } To send message to the specific user. public class ChatHub : Hub...
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Removing fields from struct or hiding them in JSON Response

...Same example as jorelli using this method: http://play.golang.org/p/JJNa0m2_nw share | improve this answer | follow | ...
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Git: “Not currently on any branch.” Is there an easy way to get back on a branch, while keeping the

... hash of last commit. Checkout the branch you wish to be at, and git merge _hash_ – Daniel May 31 '12 at 13:31 BE REAL...
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How do I get a TextBox to only accept numeric input in WPF?

...nly want to allow numbers, dots and dashes. private static readonly Regex _regex = new Regex("[^0-9.-]+"); //regex that matches disallowed text private static bool IsTextAllowed(string text) { return !_regex.IsMatch(text); } If you want to prevent pasting of incorrect data hook up the DataObj...
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Git: How to remove file from historical commit?

...anch --index-filter \ 'git rm --cached --ignore-unmatch path/to/mylarge_50mb_file' \ --tag-name-filter cat -- --all Like the rebasing option described before, filter-branch is rewriting operation. If you have published history, you'll have to --force push the new refs. The filter-branch a...