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Test if a variable is set in bash when using “set -o nounset”
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Nope, -, +, :+, and :- are all supported. The former detect whether the variable is set, and the latter detect whether it is set or empty. From man bash: "Omitting the colon results in a test only for a parameter that is unset."
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Where are the recorded macros stored in Notepad++?
...edited Jun 20 '18 at 20:26
Cos Callis
4,80533 gold badges2020 silver badges5555 bronze badges
answered Mar 25 '11 at 12:44
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How using try catch for exception handling is best practice
...me examples of the global handlers (ie ThreadException, Application_Error, etc). By all means catch SPECIFIC errors, but it is crazy to wrap ever method in a try/catch/log
– b_levitt
Aug 20 '15 at 21:43
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403 Forbidden vs 401 Unauthorized HTTP responses
...-your-own authentication protocols you may have created using login pages, etc. I will use "login" to refer to authentication and authorization by methods other than RFC2617
So the real difference is not what the problem is or even if there is a solution. The difference is what the server expects th...
How do I show the number keyboard on an EditText in android?
...ou in setting that type of key board while you are using dynamic Edit Text etc
myEditTxt.setInputType(InputType.TYPE_CLASS_NUMBER);
where myEditTxt is the dynamic EDIT TEXT object(name)
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How do I edit an existing tag message in git?
...;tag-name> [commit]
Whole story:
Building on Sungram's answer (originally proposed as an edit):
1. Accepted answer
This is an improvement over Andy and Eric Hu's answers.
Their answers will create a new tag object that references the old tag object and both are going to have the same name. ...
Seeking clarification on apparent contradictions regarding weakly typed languages
...s: These include conversions between integers, booleans, characters, sets, etc. There is no need for type violations
here, because built-in interfaces can be provided to carry out the
coercions in a type-sound way.
As such, type coercions like those provided by operators could be considered ty...
What's the difference between a mock & stub?
...anything.
Difference between Mocks and Stubs
Tests written with mocks usually follow an initialize -> set expectations -> exercise -> verify pattern to testing. While the pre-written stub would follow an initialize -> exercise -> verify.
Similarity between Mocks and Stubs
The pur...
How does Rails keep track of which migrations have run for a database?
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Rails creates a table in your database called schema_migrations to keep track of which migrations have run.
The table contains a single column, version. When Rails runs a migration, it takes the leading digits in the migration's file name and inserts a row for that "version",...
Optimizing away a “while(1);” in C++0x
...likes. The DS9K will create nasal demons for any infinite loop with no I/O etc. (Therefore, the DS9K solves the halting problem.)
– Philip Potter
Sep 7 '10 at 8:05
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