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Eclipse - Unable to install breakpoint due to missing line number attributes

...generated class file" was checked. I did a clean, recompile. I did uncheck it, recompile, check it, recompile. I made sure the project did use the global settings. Still the same message. I switched to ant build, using <javac srcdir="./src/java" destdir="./bin" debug="true"> Still, same me...
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Performance of Arrays vs. Lists

Say you need to have a list/array of integers which you need iterate frequently, and I mean extremely often. The reasons may vary, but say it's in the heart of the inner most loop of a high volume processing. ...
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Fastest way to flatten / un-flatten nested JSON objects

... some code together to flatten and un-flatten complex/nested JSON objects. It works, but it's a bit slow (triggers the 'long script' warning). ...
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Detect backspace in empty UITextField

...when the Backspace / Delete key is pressed in the iPhone keyboard on a UITextField that is empty? I want to know when Backspace is pressed only if the UITextField is empty. ...
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C dynamically growing array

I have a program that reads a "raw" list of in-game entities, and I intend to make an array holding an index number (int) of an indeterminate number of entities, for processing various things. I would like to avoid using too much memory or CPU for keeping such indexes... ...
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Have a reloadData for a UITableView animate when changing

I have a UITableView that has two modes. When we switch between the modes I have a different number of sections and cells per section. Ideally, it would do some cool animation when the table grows or shrinks. ...
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Profiling Vim startup time

...bled when using Vim – I have collected plugins over the years. I’m a bit fed up with how long Vim takes to start now, so I’d like to profile its startup and see which of the many plugins I have are responsible. ...
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Executing multi-line statements in the one-line command-line?

I'm using Python with -c to execute a one-liner loop, i.e.: 17 Answers 17 ...
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Random alpha-numeric string in JavaScript? [duplicate]

What's the shortest way (within reason) to generate a random alpha-numeric (uppercase, lowercase, and numbers) string in JavaScript to use as a probably-unique identifier? ...
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Extract elements of list at odd positions

...is is all. The result will contain the elements placed on the following positions (0-based, so first element is at position 0, second at 1 etc.): 1, 3, 5 so the result (actual numbers) will be: 2, 4, 6 Explanation The [1::2] at the end is just a notation for list slicing. Usually it is in the...