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What is non-blocking or asynchronous I/O in Node.js?
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Synchronous vs Asynchronous
Synchronous execution usually refers to code executing in sequence. Asynchronous execution refers to execution that doesn't run in the sequence it appears in the code. In the following example, the synchronous operation causes the alerts to fire in s...
Case-INsensitive Dictionary with string key-type in C#
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@ShridharRKulkarni You fundamentally can't (efficiently). The comparison logic is a core part of the internal dictionary data structure. To allow this, the container would have to maintain multiple indices for its data, and dictionaries don't do this.
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What is the advantage of using async with MVC5?
...l only when you are performing I/O bound operations such as remote server calls. The benefit of the async call is that during the I/O operation, no ASP.NET worker thread is being used. So here's how the first example works:
When a request hits the action, ASP.NET takes a thread from the thread poo...
HTTP vs HTTPS performance
...any major differences in performance between http and https? I seem to recall reading that HTTPS can be a fifth as fast as HTTP. Is this valid with the current generation webservers/browsers? If so, are there any whitepapers to support it?
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What happens if a Android Service is started multiple times?
... However, everytime you start the service, the onStartCommand() method is called.
This is documented here
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Accessing bash command line args $@ vs $*
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Scientifically speaking, tomatoes are fruits.
– Randy
Mar 18 '19 at 19:17
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SSH to Elastic Beanstalk instance
...ty group to add a rule for SSH access. The below will lock it down to only allow ingress from a specific IP address.
SSH | tcp | 22 | 22 | 192.168.1.1/32
Configure the environment of your Elastic Beanstalk Application
If you haven't made a key pair yet, make one by clicking Key Pairs below Sec...
How to check if a variable exists in a FreeMarker template?
...ich values are supplied when the template is processed. I want to conditionally include part of the template if the userName variable is supplied, something like:
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Should I use the Reply-To header when sending emails as a service to others?
Suppose we have an application that acts as a middleman, allowing Company A to send reports to their customers.
3 Answers
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Assign multiple columns using := in data.table, by group
...t(dim(get(objectName))),by=objectName]. Trouble is that as.list has call overhead and also copies the small vector. If efficiency is a problem as number of groups rises then please let us know.
– Matt Dowle
May 21 '14 at 11:49
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