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Why would one use nested classes in C++?

... it at any time so you can not use it. Look at std::list or std::map they all contain hidden classes (or do they?). The point is they may or may not, but because the implementation is private and hidden the builders of the STL were able to update the code without affecting how you used the code, or...
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How do I include a pipe | in my linux find -exec command?

...ld result in only a single agrep process being spawned which would process all the output produced by numerous invocations of zcat. If you for some reason would like to invoke agrep multiple times, you can do: find . -name 'file_*' -follow -type f \ -printf "zcat %p | agrep -dEOE 'grep'\n" | s...
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How to wait for several Futures?

...ave several futures and need to wait until either any of them fails or all of them succeed. 8 Answers ...
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How to check if all elements of a list matches a condition?

... The best answer here is to use all(), which is the builtin for this situation. We combine this with a generator expression to produce the result you want cleanly and efficiently. For example: >>> items = [[1, 2, 0], [1, 2, 0], [1, 2, 0]] >>...
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How do I show a MySQL warning that just happened?

I just ran a simple MySQL CREATE TABLE statement that produced the line 3 Answers 3 ...
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How to set selected value of jquery select2?

... To dynamically set the "selected" value of a Select2 component: $('#inputID').select2('data', {id: 100, a_key: 'Lorem Ipsum'}); Where the second parameter is an object with expected values. UPDATE: This does work, just wanted to n...
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Closing JDBC Connections in Pool

...n attempt to get a connection from the pool, and if DataSource cannot be established, use the old fashioned DriverManager. We are not even sure which part is getting executed at runtime. Repeating the question above, should one close the Connection coming out of such a method? The example is pretty...
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Mongoose, Select a specific field with find

... I think .select just is a filter to choose field after you get all of that, my recommendation is to use .find({}, 'name -_id') – hong4rc Mar 2 '19 at 16:15 ...
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Where in a virtualenv does the custom code go?

... instance, if I were building a WSGI application and created a virtualenv called foobar I would start with a directory structure like: ...
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Using AES encryption in C#

...aged.aspx And just in case you need the sample in a hurry, here it is in all its plagiarized glory: using System; using System.IO; using System.Security.Cryptography; namespace RijndaelManaged_Example { class RijndaelExample { public static void Main() { try ...