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How to use GROUP BY to concatenate strings in MySQL?
...result with the concatenated non-NULL values from a group. It returns NULL if there are no non-NULL values.
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Pros and cons to use Celery vs. RQ [closed]
..."what is a broker", but also means you cannot switch brokers in the future if Redis no longer works for you. For example, Instagram considered both Redis and RabbitMQ with Celery. This is important because different brokers have different guarantees e.g. Redis cannot (as of writing) guarantee 100% t...
Best exception for an invalid generic type argument
...y fits, but the documentation clearly states that it should be used for a different purpose. From the MSDN class remarks:
There are methods that are not
supported in the base class, with the
expectation that these methods will be
implemented in the derived classes
instead. The derived cl...
Internal Error 500 Apache, but nothing in the logs?
...etting 500 Internal Server errors when I try to make an HTTP POST to a specific address in my app. I've looked into the server logs in the custom log directory specified in the virtual hosts file, but the error doesn't show up there so debugging this has been a pain in the ass.
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Reading string from input with space character? [duplicate]
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What if the length of the C-string is unknown? If I delete the number 100 in char name[100];, it becomes char name[] and name contains no white space.
– Alston
Nov 14 '13 at 11:42
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Find closing HTML tag in Sublime Text
...atching Pair:
http://docs.emmet.io/actions/go-to-pair/
Shortcut (Mac): Shift + Control + T
Shortcut (PC): Control + Alt + J
https://github.com/sergeche/emmet-sublime#available-actions
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BigDecimal setScale and round
What is the difference between this two call? (Is there any?)
2 Answers
2
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Switch to another Git tag
...o checkout a tag:
git checkout 1.1.4
But as was mentioned in a comment, if you have a branch by that same name, this will result in git warning you that the refname is ambiguous and checking out the branch by default:
warning: refname 'test' is ambiguous.
Switched to branch '1.1.4'
The shortha...
What is the difference between Class.this and this in Java
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If instead of Person.this.name you just said "return name" will that not work?
– Amit G
Apr 14 '11 at 16:48
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List all of the possible goals in Maven 2?
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The goal you indicate in the command line is linked to the lifecycle of Maven. For example, the build lifecycle (you also have the clean and site lifecycles which are different) is composed of the following phases:
validate: validate the project is correct and all necessary informat...