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SQLite - UPSERT *not* INSERT or REPLACE
...author
FROM new LEFT JOIN page AS old ON new.name = old.name;
The exact form of this query can vary a bit. The key is the use of INSERT SELECT with a left outer join, to join an existing row to the new values.
Here, if a row did not previously exist, old.id will be NULL and SQLite will then assi...
Why do we need entity objects? [closed]
...ated with) the SQL, and your code is stored inside the database. Boosts performance by avoiding network roundtrips. And encapsulates your business logic regardless of which client connects to the database.
– ObiWanKenobi
Dec 15 '10 at 14:27
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Android Shared preferences for creating one time activity (example) [closed]
I have three activities A,B and C where A and B are forms and after filling and saving the form data in database(SQLITE). I am using intent from A to B and then B to C.What i want is that every time I open my app I want C as my home screen and not A and B anymore.
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Is it safe to delete a void pointer?
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It depends on "safe." It will usually work because information is stored along with the pointer about the allocation itself, so the deallocator can return it to the right place. In this sense it is "safe" as long as your allocator uses internal boundary tags. (Many do.)
How...
What are the main disadvantages of Java Server Faces 2.0?
...as the initial release. It was cluttered with bugs in both the core and performance areas you don't want to know about. Your webapplication didn't always work as you'd intuitively expect. You as developer would run hard away crying.
JSF 1.1 (May 2004)
This was the bugfix release. The performance w...
What is JavaScript garbage collection?
...icle should be considered "for historical purposes only". But it's still informative.
– Peter Ivan
Sep 17 '12 at 14:23
2
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git stash changes apply to new branch?
...stash push" in that it cannot take pathspecs, and any non-option arguments form the message.
– randomcontrol
Jan 2 at 12:39
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show 2 more co...
Is there any way to change input type=“date” format?
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It is impossible to change the format
We have to differentiate between the over the wire format and the browser's presentation format.
Wire format
The HTML5 date input specification refers to the RFC 3339 specification, which specifies a full-date forma...
What is the correct value for the disabled attribute?
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HTML5 spec:
http://www.w3.org/TR/html5/forms.html#enabling-and-disabling-form-controls:-the-disabled-attribute :
The checked content attribute is a boolean attribute
http://www.w3.org/TR/html5/infrastructure.html#boolean-attributes :
The presence of a boolean a...
A better similarity ranking algorithm for variable length strings
...ist(range(len(s) - 1))]
def string_similarity(str1, str2):
"""
Perform bigram comparison between two strings
and return a percentage match in decimal form.
"""
pairs1 = get_bigrams(str1)
pairs2 = get_bigrams(str2)
union = len(pairs1) + len(pairs2)
hit_count = 0
...