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doGet and doPost in Servlets

...tpServletResponse response) throws ServletException, IOException { String username = request.getParameter("username"); String password = request.getParameter("password"); User user = userService.find(username, password); if (user != null) { request.getSes...
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Android Log.v(), Log.d(), Log.i(), Log.w(), Log.e() - When to use each one?

... You can use LOG such as : Log.e(String, String) (error) Log.w(String, String) (warning) Log.i(String, String) (information) Log.d(String, String) (debug) Log.v(String, String) (verbose) example code: private static final String TAG = "MyActivity"; ... L...
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Unknown column in 'field list' error on MySQL Update query

...n I was confused and used double quotes instead of single quotes around my strings. – tripleee Mar 21 '18 at 13:18 add a comment  |  ...
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What is the difference between mocking and spying when using Mockito?

...e, WithdrawMoneyService withdrawMoneyService, double amount, String fromAccount, String toAccount){ withdrawMoneyService.withdraw(fromAccount,amount); depositMoneyService.deposit(toAccount,amount); } You may don't need spy because you can just mock DepositMoneyService and Wit...
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Redirect From Action Filter Attribute

...Action from the filter. public new RedirectToRouteResult RedirectToAction(string action, string controller) { return base.RedirectToAction(action, controller); } Then your filter would look something like: public override void OnActionExecuting(ActionExecutingContext filterContext) { var...
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Grep not as a regular expression

... Use fgrep (deprecated), grep -F or grep --fixed-strings, to make it treat the pattern as a list of fixed strings, instead of a regex. For reference, the documentation mentions (excerpts): -F --fixed-strings Interpret the pattern as a list of fixed strings (instead o...
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The ViewData item that has the key 'MY KEY' is of type 'System.String' but must be of type 'IEnumera

... Try adding a string for the name of your dropdown list as the first parameter, and get the item out of your viewdata: <%= Html.DropDownList("SomeDropdownName", (IEnumerable<SelectListItem>)ViewData["basetype"]) %> Here is ...
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The Guava library: What are its most useful and/or hidden features? [closed]

...ially used it for collections shorthands. For example, instead of: Map<String, Map<Long, List<String>>> map = new HashMap<String, Map<Long, List<String>>>(); you can do this: Map<String, Map<Long, List<String>>> map = Maps.newHashMap(); It'...
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Split data frame string column into multiple columns

... Use stringr::str_split_fixed library(stringr) str_split_fixed(before$type, "_and_", 2) share | improve this answer |...
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java.io.Console support in Eclipse IDE

...stem.out instead of Console when using Eclipse. For example, instead of: String line = System.console().readLine(); You can use: BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in)); String line = bufferedReader.readLine(); ...