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How do I revert an SVN commit?
... the changes in your working copy (with diff), but you'd need to commit in order to apply the revert into the repository.
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org.xml.sax.SAXParseException: Content is not allowed in prolog
...ot the case here.
Another thing that often happens is a UTF-8 BOM (byte order mark), which is allowed before the XML declaration can be treated as whitespace if the document is handed as a stream of characters to an XML parser rather than as a stream of bytes.
The same can happen if schema files...
Printing all global variables/local variables?
...ion use select-frame before info locals
E.g.:
(gdb) bt
#0 0xfec3c0b5 in _lwp_kill () from /lib/libc.so.1
#1 0xfec36f39 in thr_kill () from /lib/libc.so.1
#2 0xfebe3603 in raise () from /lib/libc.so.1
#3 0xfebc2961 in abort () from /lib/libc.so.1
#4 0xfebc2bef in _assert_c99 () from /lib/libc....
Comparing HTTP and FTP for transferring files
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COALESCE Function in TSQL
...type, they get implicitly cast to an appropriate data-type using data-type order of precedence.)
It's like ISNULL() but for multiple parameters, rather than just two.
It's also ANSI-SQL, where-as ISNULL() isn't.
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Getting the minimum of two values in SQL
...ll, the switch-case shown might return null or the value, depending on the order of the WHEN test (unless you add use of ISNULL). Craig's approach will always prefer selection of the not-null value which seems more correct to me, at least in my current use-case in the comparison of nullable dates.
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java.lang.OutOfMemoryError: Java heap space in Maven
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In order to resolve java.lang.OutOfMemoryError: Java heap space in Maven, try to configure below configuration in pom
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-p...
Getting “unixtime” in Java
... platforms (and the year 2038 problem). 64-bit platforms use a larger time_t data type. Java dodged that bullet by using a long as the return for System.currentTimeMillis(). If you convert to int, you're re-introducing the year 2038 problem. See en.wikipedia.org/wiki/Year_2038_problem#Solutions
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Can you attach Amazon EBS to multiple instances?
...ble to get an EBS volume attached to more than one instance, it would be a _REALLY_BAD_IDEA_. To quote Kekoa, "this is like using a hard drive in two computers at once"
Why is this a bad idea? ...
The reason you can't attach a volume to more than one instance is that EBS provides a "block storage...
Using relative URL in CSS file, what location is it relative to?
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In order to create modular style sheets that are not dependent on the absolute location of a resource, authors may use relative URIs. Relative URIs (as defined in [RFC3986]) are resolved to full URIs using a base URI. RFC 3986, ...