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How can I check for an empty/undefined/null string in JavaScript?
...ng the === operator (so that you know that it is, in fact, a string you're comparing against).
if (strValue === "") {
//...
}
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How to output only captured groups with sed?
...
echo "$string" | grep -Po '(?<=\D )(\d+)'
The -P option enables Perl Compatible Regular Expressions. See man 3 pcrepattern or man
3 pcresyntax.
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Multiple arguments vs. options object
...hand, there are functions with calls like this:
initiateTransferProtocol("http", false, 150, 90, null, true, 18);
Completely unreadable unless you do some research. On the other hand, this code reads well:
initiateTransferProtocol({
"protocol": "http",
"sync": false,
"delayBetweenRet...
initialize a vector to zeros C++/C++11
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How to get an object's property's value by property name?
...nd indicates that an attempt should
be made to expand that property
https://technet.microsoft.com/en-us/library/hh849895.aspx
[PS]> (Get-Process)[0] | Select-Object -ExpandProperty Name
armsvc
powershell variables
...
Equivalent VB keyword for 'break'
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How to find available versions for a bower dependency
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What is a Manifest in Scala and when do you need it?
...using type-classes in scala, and is well explained here by Debasish Ghosh:
http://debasishg.blogspot.com/2010/06/scala-implicits-type-classes-here-i.html
Context bounds can also just make the method signatures more readable. For example, the above function could be re-written using context bounds ...
Java8 Lambdas vs Anonymous classes
...oid boilerplate code. I came across this interesting article on lambda's.
http://radar.oreilly.com/2014/04/whats-new-in-java-8-lambdas.html
It's advisable to use lambda functions for simple logics. If implementing complex logic using lambdas will be a overhead in debugging the code in case of issu...
Understanding the Event Loop
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