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Getting parts of a URL (Regex)
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the further parse 'the rest' to be as specific as possible. Doing it in one regex is, well, a bit crazy.
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Incrementing a date in JavaScript
I need to increment a date value by one day in JavaScript.
16 Answers
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ConcurrentHashMap vs Synchronized HashMap
...re a lock.
Locking the entire collection is a performance overhead. While one thread holds on to the lock, no other thread can use the collection.
ConcurrentHashMap was introduced in JDK 5.
There is no locking at the object level,The locking is at a much finer granularity. For a ConcurrentHashMa...
Postgresql - change the size of a varchar column to lower length
...e ALTER TABLE command on a really large table (almost 30 millions rows).
One of its columns is a varchar(255) and I would like to resize it to a varchar(40) .
Basically, I would like to change my column by running the following command:
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How to amend a commit without changing commit message (reusing the previous one)?
...lazy, upgrade git and use the built-in command that Shaggle suggests! Plus one for -C option though.
– Dimitris Baltas
Jun 26 '12 at 15:56
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Data Modeling with Kafka? Topics and Partitions
One of the first things I think about when using a new service (such as a non-RDBMS data store or a message queue) is: "How should I structure my data?".
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Maven parent pom vs modules pom
...ays to structure parent poms in a multiproject build and I wondering if anyone had any thoughts on what the advantages / drawbacks are in each way.
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How can I remove or replace SVG content?
...n the update button, it generates a new svg , so I want to remove the old one or update its content.
7 Answers
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How do ACID and database transactions work?
...micity means that you can guarantee that all of a transaction happens, or none of it does; you can do complex operations as one single unit, all or nothing, and a crash, power failure, error, or anything else won't allow you to be in a state in which only some of the related changes have happened.
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What's the difference between the atomic and nonatomic attributes?
...ead B and C calling the setter with different values, thread A may get any one of the three values returned -- the one prior to any setters being called or either of the values passed into the setters in B and C. Likewise, the object may end up with the value from B or C, no way to tell.
Ensuring ...