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Solutions for INSERT OR UPDATE on SQL Server
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don't forget about transactions. Performance is good, but simple (IF EXISTS..) approach is very dangerous.
When multiple threads will try to perform Insert-or-update you can easily
get primary key violation.
Solutions provided by @Beau Crawford &...
Why java.util.Optional is not Serializable, how to serialize the object with such fields
...bject with enums. The other case is where class has fields of java.util.Optional class. In this case the following exception is thrown: java.io.NotSerializableException: java.util.Optional
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ReactJS Two components communicating
...ventName,eventCallback);} triggerEvent: function(eventName, params) { $.event.trigger(eventName, params);} Hope it helps! (sorry could not format it better)
– 5122014009
Jan 24 '14 at 5:08
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Detect when an HTML5 video finishes
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You can add an event listener with 'ended' as first param
Like this :
<video src="video.ogv" id="myVideo">
video not supported
</video>
<script type='text/javascript'>
document.getElementById('myVideo').addEventListener('ended',myHandler,false);
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PostgreSQL database default location on Linux
...nux and Ubuntu 14.04 by default.
You can find postgresql.conf and look at param data_directory. If it is commented then database directory is the same as this config file directory.
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What does send() do in Ruby?
...gn attributes to your car class from user input, you can do
c = Car.new()
params.each do |key, value|
c.send("#{key}=", value)
end
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How do I convert a String to an InputStream in Java?
...am of bytes that represent your original string encoded as UTF-8.
For versions of Java less than 7, replace StandardCharsets.UTF_8 with "UTF-8".
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jQuery UI slider Touch & Drag/Drop support on Mobile devices
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works like a charme with rails5 android and ios devices
– Stef Hej
Jan 16 '17 at 19:26
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How to make exe files from a node.js app?
...node.exe and your scripts.
Depending on your script, you also have the option to port it to JSDB, which supports an easy way to create executables by simply appending resources to it.
A third quasi-solution is to keep node somewhere like C:\utils and add this folder to your PATH environment variab...
How to terminate a python subprocess launched with shell=True
...proc.kill()
process.kill()
proc = subprocess.Popen(["infinite_app", "param"], shell=True)
try:
proc.wait(timeout=3)
except subprocess.TimeoutExpired:
kill(proc.pid)
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