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How to format a duration in java? (e.g format H:MM:SS)
...Type you want to reflect whether 25 hours becomes 1 day and 1 hour or not, etc) to get a Period which you can format.
If you're using Java 8 or later: I'd normally suggest using java.time.Duration to represent the duration. You can then call getSeconds() or the like to obtain an integer for standar...
Can table columns with a Foreign Key be NULL?
...record containing NULL foreign keys only applies to string types (varchar, etc), because otherwise an empty string can be passed as default. This is the case with MySQL, and results in an integrity error on update.
– CodeMantle
Mar 21 at 8:28
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How do I center align horizontal menu?
... solutions, including the mix of inline-block / block / center-align etc., but haven't succeeded.
16 Answers
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How to convert comma-separated String to List?
...ll work for strings like "item1 , item2 , item3", or "item1,item2 ,item3", etc. In Java, you need to escape the backslash in strings, so you get \\s*
– andrewrjones
Nov 14 '12 at 9:44
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Get url parameters from a string in .NET
...llo.html?valuelesskey
hello.html?key=value=hi
hello.html?hi=value?&b=c
etc
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Importance of varchar length in MySQL table
...re memory than you have to. This affects cache efficiency, sorting speed, etc.
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Is this the right way to clean-up Fragment back stack when leaving a deeply nested stack?
...ause are loading the Fragment calling onCreateView(), onActivityCreated(), etc. Restoring and Destroing a Fragment instantly is bad. The Fragment can register a receiver for example. This affects the performance.
– VasileM
May 10 '19 at 17:35
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Best way to get InnerXml of an XElement?
...tween the two. element.Nodes() gives you everything like XText, XAttribute etc, but XElement only an Element.
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Are HTTPS headers encrypted?
... header; the browser knows some header information (content type, unicode, etc); and browser history, password management, favorites/bookmarks, and cached pages will all contain the querystring. Server logs on the remote end can also contain querystring as well as some content details.
Also, the U...
PostgreSQL ERROR: canceling statement due to conflict with recovery
...ndby_archive_delay and max_standby_streaming_delay to some sane value:
# /etc/postgresql/10/main/postgresql.conf on a slave
max_standby_archive_delay = 900s
max_standby_streaming_delay = 900s
This way queries on slaves with a duration less than 900 seconds won't be cancelled. If your workload req...