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How to check if array is empty or does not exist? [duplicate]
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You want to do the check for undefined first. If you do it the other way round, it will generate an error if the array is undefined.
if (array === undefined || array.length == 0) {
// array empty or does not exist
}
Update
This answer is getting a fair amount of attention, so...
How to stop app that node.js express 'npm start'
You build node.js app with express v4.x then start your app by npm start . My question is how to stop the app? Is there npm stop ?
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Read text file into string array (and write)
The ability to read (and write) a text file into and out of a string array is I believe a fairly common requirement. It is also quite useful when starting with a language removing the need initially to access a database. Does one exist in Golang?
e.g.
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How to specify a min but no max decimal using the range data annotation attribute?
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edited May 19 at 16:29
carlin.scott
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C# vs Java generics [duplicate]
...s good as the C# implementation. In that the syntax looks similar, what is it that is substandard about the Java implementation, or is it a religious point of view?
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“unrecognized import path” with go get
I'm trying to install a web.go , but running go get github.com/hoisie/web returns
9 Answers
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How to determine one year from now in Javascript
I'm trying to get one year from now's date, and it's not working.
7 Answers
7
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Can you use if/else conditions in CSS?
I would like to use conditions in my CSS.
16 Answers
16
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How do I truncate a .NET string?
I would like to truncate a string such that its length is not longer than a given value. I am writing to a database table and want to ensure that the values I write meet the constraint of the column's datatype.
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get string value from HashMap depending on key name
I have a HashMap with various keys and values, how can I get one value out?
10 Answers
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