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How to escape text for regular expression in Java
...rary text so that it can be included in a regular expression? For example, if my users enter "$5", I'd like to match that exactly rather than a "5" after the end of input.
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chart.js load totally new data
... it would help the empty the graph-container div to remove old iframes $('#results-graph').remove(); $('#graph-container').empty(); $('#graph-container').append('<canvas id="results-graph"><canvas>');
– heyyan khan
Aug 18 '17 at 11:42
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Maven: The packaging for this project did not assign a file to the build artifact
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I don't know if this is the answer or not but it might lead you in the right direction...
The command install:install is actually a goal on the maven-install-plugin. This is different than the install maven lifecycle phase.
Maven lifecy...
BigDecimal - to use new or valueOf
...BigDecimal object will be what you see when you do System.out.println(d).
If you use new BigDecimal(d) however, then the BigDecimal will try to represent the double value as accurately as possible. This will usually result in a lot more digits being stored than you want. Strictly speaking, it's mor...
how do I query sql for a latest record date for each user
... Careful with this approach: it can return more than one row per user if they have more than one record per date (max(date) would return a date that would join multiple records). To avoid this issue, it would be preferable to use @dotjoe's solution: stackoverflow.com/a/2411763/4406793.
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How to load images dynamically (or lazily) when users scrolls them into view
...of images.
Plugin
Demo
EDIT: How do these plugins work?
This is a simplified explanation:
Find window size and find the position of all images and their sizes
If the image is not within the window size, replace it with a placeholder of same size
When user scrolls down, and position of image &l...
how to get the one entry from hashmap without iterating
... of obtaining only one Entry<K,V> from HashMap, without iterating, if key is not known.
14 Answers
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Is it possible to view RabbitMQ message contents directly from the command line?
...nt
See here:
http://www.rabbitmq.com/plugins.html
And here for the specifics of management.
http://www.rabbitmq.com/management.html
Finally once set up you will need to follow the instructions below to install and use the rabbitmqadmin tool. Which can be used to fully interact with the system...
What's best SQL datatype for storing JSON string?
...000 bytes or less (VARCHAR up to 8000 characters, NVARCHAR up to 4000), or if that's not enough, use the (N)VARCHAR(MAX) versions, which store up to 2 GByte of data.
Update: SQL Server 2016 will have native JSON support - a new JSON datatype (which is based on nvarchar) will be introduced, as well ...
How to comment out a block of code in Python [duplicate]
...ocumentation strings not block comments, although it has a similar effect. If you're just commenting things out temporarily, this is fine as a temporary measure.
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