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Deleting lines from one file which are in another file
...atching lines
-x to match whole lines only
-f f2 to get patterns from f2
One can instead use grep -F or fgrep to match fixed strings from f2 rather than patterns (in case you want remove the lines in a "what you see if what you get" manner rather than treating the lines in f2 as regex patterns).
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Why doesn't C++ have a garbage collector?
...rbage collection, and understanding them helps understanding why there is none in C++.
1. Performance ?
The first complaint is often about performance, but most people don't really realize what they are talking about. As illustrated by Martin Beckett the problem may not be performance per se, but ...
Can you split a stream into two streams?
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Not exactly. You can't get two Streams out of one; this doesn't make sense -- how would you iterate over one without needing to generate the other at the same time? A stream can only be operated over once.
However, if you want to dump them into a list or something, you...
Why an abstract class implementing an interface can miss the declaration/implementation of one of th
... it makes better sense to factor it into a separate base class (DRY trumps one-place-code)
– Gishu
Oct 13 '08 at 15:23
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What is the motivation for bringing Symbols to ES6?
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Most languages (all mainstream ones afaik) provide some mechanism, usually reflection, to get access to private anyway.
– Esailija
May 14 '14 at 10:58
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Correct use of Multimapping in Dapper
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One thing to remember is you can't have spaces in the spliton, ie CustomerId,CustomerName not CustomerId, CustomerName, since Dapper doesn't Trim the results of the string split. It will just throw the generic spliton error. ...
More elegant way of declaring multiple variables at the same time
...lues is the best way to write your routine (especially if they really have one-letter names :)
Depending on what you're doing, it may make sense to use a dictionary instead. For example, if you want to set up Boolean preset values for a set of one-letter flags, you could do this:
>>> fla...
How to execute more than one maven command in bat file?
...ne (show in batch output), you must also do echo on after the call mvn is done (on the next line). This is because mvn turns echo off and doesn't turn it back on.
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Vim: How do you open another [No Name] buffer like the one on startup?
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:new will create a split window with an unnamed buffer.
:enew will open one in the current window.
:vnew will open one in a vertically split window.
:tabnew will open one in a new tab.
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Shards and replicas in Elasticsearch
...node which tries to join an existing cluster if available or creates a new one. Let's say you created your own new cluster with a single node, the one that you just started up. We have no data, therefore we need to create an index.
When you create an index (an index is automatically created when yo...