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Can we write our own iterator in Java?
If I have a list containing [alice, bob, abigail, charlie] and I want to write an iterator such that it iterates over elements that begin with 'a', can I write my own ? How can I do that ?
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Enum “Inheritance”
I have an enum in a low level namespace. I'd like to provide a class or enum in a mid level namespace that "inherits" the low level enum.
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What is the function of the push / pop instructions used on registers in x86 assembly?
When reading about assembler I often come across people writing that they push a certain register of the processor and pop it again later to restore it's previous state.
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SecurityError: Blocked a frame with origin from accessing a cross-origin frame
I am loading an <iframe> in my HTML page and trying to access the elements within it using Javascript, but when I try to execute my code, I get the following error:
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How to launch an Activity from another Application in Android
I want to launch an installed package from my Android application. I assume that it is possible using intents, but I didn't find a way of doing it. Is there a link, where to find the information?
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Count number of occurrences of a pattern in a file (even on same line)
When searching for number of occurrences of a string in a file, I generally use:
5 Answers
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ASP.NET custom error page - Server.GetLastError() is null
I have a custom error page set up for my application:
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Notifier 通知扩展：功能强大的Android通知管理工具，支持通知通道、意图、...
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How to debug Lock wait timeout exceeded on MySQL?
In my production error logs I occasionally see:
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Why aren't variables declared in “try” in scope in “catch” or “finally”?
In C# and in Java (and possibly other languages as well), variables declared in a "try" block are not in scope in the corresponding "catch" or "finally" blocks. For example, the following code does not compile:
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