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Difference between / and /* in servlet mapping url pattern
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<url-pattern>/*</url-pattern>
The /* on a servlet overrides all other servlets, including all servlets provided by the servletcontainer such as the default servlet and the JSP servlet. Whatever request you fire, it will end up in that servlet. This is thus a bad URL pattern for servle...
JavaScript/jQuery to download file via POST with JSON data
...d single-page webapp. It communicates with a RESTful web service via AJAX calls.
14 Answers
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What's the difference between git clone --mirror and git clone --bare
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The difference is that when using --mirror, all refs are copied as-is. This means everything: remote-tracking branches, notes, refs/originals/* (backups from filter-branch). The cloned repo has it all. It's also set up so that a remote update will re-fetch everything f...
What is the purpose of “&&” in a shell command?
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You may notice I've used the word "intent" - that's for good reason. Not all programs have the same behavior, so for this to work, you need to understand what the program considers a "failure" and how it handles it by reading the documentation and, if necessary, the source code.
Your shell consid...
Named string formatting in C#
...ed in at {LastLoginDate}".FormatWith(user);
A third improved method partially based on the two above, from Phil Haack
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Double Iteration in List Comprehension
...f_words
I like to think of list comprehension as stretching code horizontally.
Try breaking it up into:
# List Comprehension
[word for sentence in text for word in sentence]
Example:
>>> text = (("Hi", "Steve!"), ("What's", "up?"))
>>> [word for sentence in text for word in...
Why does string::compare return an int?
Why does string::compare return an int instead of a smaller type like short or char ? My understanding is that this method only returns -1, 0 or 1.
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Entity Framework: “Store update, insert, or delete statement affected an unexpected number of rows (
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That's a side-effect of a feature called optimistic concurrency.
Not 100% sure how to turn it on/off in Entity Framework but basically what it's telling you is that between when you grabbed the data out of the database and when you saved your changes someone ...
How to set a default value for a datetime column to record creation time in a migration?
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You can add a function in a model like this:
before_create :set_foo_to_now
def set_foo_to_now
self.foo = Time.now
end
So that the model will set the current time in the model.
You can also place some sql code in the migration for setting the default value at the database level,...
PHP - Check if two arrays are equal
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The above comment is false. If $b has all the elements $a has plus some extra ones, the two arrays are not equal yet the above code will say they are.
– Ghola
Sep 8 '14 at 12:14
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