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Ruby class instance variable vs. class variable

...mmon to that class without having sub-classes automatically also get them (and vice-versa). With class variables, you have the convenience of not having to write self.class from an instance object, and (when desirable) you also get automatic sharing throughout the class hierarchy. Merging these t...
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How to determine the current shell I'm working on

...t to actual shell name in csh or tcsh $ZSH_NAME is set on zsh ksh has $PS3 and $PS4 set, whereas the normal Bourne shell (sh) only has $PS1 and $PS2 set. This generally seems like the hardest to distinguish - the only difference in the entire set of environment variables between sh and ksh we have i...
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Factory pattern in C#: How to ensure an object instance can only be created by a factory class?

... method of a factory class. Let us say I have some "business object" class and I want to make sure any instance of this class will have a valid internal state. In order to achieve this I will need to perform some check before creating an object, probably in its constructor. This is all okay until I ...
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OSX - How to auto Close Terminal window after the “exit” command executed.

... edited Nov 13 '18 at 19:38 Sandy Chapman 9,83733 gold badges5353 silver badges6262 bronze badges answered Jul 28 '13 at 16:38 ...
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Mapping composite keys using EF code first

...actually have an entity for the join table... I just have the two entities and an EntityConfiguration on one of them with a .Map() to set up the mapping. – Mir May 6 '14 at 15:33 3...
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Convert array of integers to comma-separated string

... Is there a simple way to do the reverse of this? Take the string and put it into an array? – Kory Mar 11 '15 at 15:13 4 ...
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How to print a query string with parameter values when using Hibernate

... I am using grails 2.4.4 and hibernate 4. Changing log4j configuration did not work for me but p6spy worked! – Champ Jan 13 '15 at 7:03 ...
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How to check if element exists using a lambda expression?

Specifically, I have TabPane, and I would like to know if there is element with specific ID in it. 3 Answers ...
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How to terminate a window in tmux?

...esize-pane -R 1 bind - resize-pane -D 1 bind + resize-pane -U 1 bind . command-prompt bind a last-window bind space command-prompt -p index "select-window" bind r source-file ~/.tmux.conf # Options set -g bell-action none set -g set-titles on set -g set-titles-string "tmux (#I:#W)" set -g base-inde...
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Authentication versus Authorization

...ontext of web applications? I see the abbreviation "auth" a lot. Does it stand for auth -entication or auth -orization? Or is it both? ...