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ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired
...cked by some query. For example, you may have executed "select for update" and have not yet committed/rollbacked and fired another select query. Do a commit/rollback before executing your query.
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Xcode doesn't see my iOS device but iTunes does
...s developed for or lesser.
Otherwise there is some issue with certificates and provisioning profiles. Make sure your device's UDID is added in the provisioning profile you are using.
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Intellij IDEA. Hide .iml files
I use Intellij IDEA 12 and I want to hide .iml files in Project view. How I can achieve this?
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Java NIO FileChannel versus FileOutputstream performance / usefulness
... nio FileChannel versus normal FileInputStream/FileOuputStream to read and write files to filesystem. I observed that on my machine both perform at the same level, also many times the FileChannel way is slower. Can I please know more details comparing these two methods. Here is the code I used...
Is the “struct hack” technically undefined behavior?
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It's not clear if it's legal or portable, but it is rather popular.
and:
... an official interpretation has deemed that it is not strictly conforming with the C Standard, although it does seem to work under all known implementations. (Compilers which check array bounds carefully might iss...
Composer killed while updating
...atest versions of every package. This makes your app less likely to break, and composer uses less memory.
Read more here: https://getcomposer.org/doc/01-basic-usage.md#installing-with-composer-lock
Alternatively, you can upload the entire vendor directory to the server, bypassing the need to run com...
Where is my .vimrc file?
I have been using Vim , and I would really like to save my settings. The problem I am having is that I cannot find my .vimrc file, and it is not in the standard /home/user/.vimrc location. How might I find this file?
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start MySQL server from command line on Mac OS Lion
...led in System Preference, I want to know the instruction to start from command-line.
I do as follow:
13 Answers
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LINQ's Distinct() on a particular property
... is a "distinct-by" effectively. I don't believe it's part of LINQ as it stands, although it's fairly easy to write:
public static IEnumerable<TSource> DistinctBy<TSource, TKey>
(this IEnumerable<TSource> source, Func<TSource, TKey> keySelector)
{
HashSet<TKey>...
Where to install Android SDK on Mac OS X?
Where should the Android SDK be installed on Mac OS X?
12 Answers
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