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How to list files in a directory in a C program?
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172
An example, available for POSIX compliant systems :
/*
* This program displays the names of ...
Swift native base class or NSObject
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109
Swift classes that are subclasses of NSObject:
are Objective-C classes themselves
use objc_m...
When to use StringBuilder in Java [duplicate]
...ion in a loop, something like this,
String s = "";
for (int i = 0; i < 100; i++) {
s += ", " + i;
}
then you should use a StringBuilder (not StringBuffer) instead of a String, because it is much faster and consumes less memory.
If you have a single statement,
String s = "1, " + "2, " + "...
RSpec: describe, context, feature, scenario?
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150
The context is an alias for describe, so they are functionally equivalent. You can use them in...
How do I add a submodule to a sub-directory?
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451
You go into ~/.janus and run:
git submodule add <git@github ...> snipmate-snippets/snippe...
CSS: how to add white space before element's content?
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edited Mar 13 '16 at 9:52
answered May 14 '13 at 20:36
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Can you make just part of a regex case-insensitive?
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answered Sep 4 '08 at 12:35
EspoEspo
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Possible to do a MySQL foreign key to one of two possible tables?
...es (
user_id INT NOT NULL,
place_id INT NOT NULL,
place_type VARCHAR(10) -- either 'states' or 'countries'
-- foreign key is not possible
);
There's no way to model Polymorphic Associations using SQL constraints. A foreign key constraint always references one target table.
Polymorphic As...
Update a submodule to the latest commit
...t -m "projA submodule updated"
UPDATE
As @paul pointed out, since git 1.8, we can use
git submodule update --remote --merge
to update the submodule to the latest remote commit. It'll be convenient in most cases.
shar...