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SQL how to increase or decrease one for a int column in one command
...ateless, With good indexes, you will not see a diff with the following SQL vs 1 statement.
IF (select top 1 * form x where PK=@ID)
Insert
else
update
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What is an example of the Liskov Substitution Principle?
...t interfaces and contracts as well as how to decide when to extend a class vs. use another strategy such as composition to achieve your goal.
The most effective way I have seen to illustrate this point was in Head First OOA&D. They present a scenario where you are a developer on a project to bu...
How do I remove the space between inline/inline-block elements?
...CSS solution, but this solution - which is by far the most voted (30 votes vs 5 as I write this) - has strong side effects and doesn't even work cross browser. At this point it's more pragmatic to simply remove the problematic whitespace in your HTML.
– Steph Thirion
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Whether a variable is undefined [duplicate]
...ease use typeof(var) === 'undefined' as undefined is not a constant in JavaScript.
– JonnyReeves
Feb 12 '12 at 10:21
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How can I combine hashes in Perl?
...write a key-value pair with a non-empty value?
What constitutes an empty vs non-empty value in the first place? (eg. undef, zero, empty string, false, falsy ...)
See also
PM post on merging hashes
PM Categorical Q&A hash union
Perl Cookbook 5.10. Merging Hashes
websearch://perlfaq "merge ...
What are Flask Blueprints, exactly?
...for disambiguation when referring to routes (e. g. someBlueprint.routeName vs. anotherBlueprint.routeName).
– Sean Vieira
Aug 8 '17 at 6:19
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difference between use and require
...es this bar come from" but see a more explicit foo::bar instead. require (vs use) supports this "explicit namespaces" style.
– Alex Martelli
May 18 '09 at 4:20
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LINQ to SQL - Left Outer Join with multiple join conditions
...A "union" is a different operation than a "cross-join". It's like addition vs. multiplication.
– Suncat2000
Nov 18 '19 at 17:14
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Difference between Hashing a Password and Encrypting it
...f recovering the password from the hash value.
Extracted from Encrypted vs Hashed Passwords - Which is better?
Is encryption good?
Plain text passwords can be encrypted using symmetric encryption algorithms like DES, AES or with any other algorithms and be stored inside the database. At the aut...
Simplest PHP example for retrieving user_timeline with Twitter API version 1.1
Because of the Twitter API 1.0 retirement as of June 11th 2013 , the script below does not work anymore.
14 Answers
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