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How to check if function exists in JavaScript?
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Try something like this:
if (typeof me.onChange !== "undefined") {
// safe to use the function
}
or better yet (as per UpTheCreek upvoted comment)
if (typeof me.onChange === "function") {
// safe to use the function
}...
JavaScript single line 'if' statement - best syntax, this alternative? [closed]
...ion none the less, that forgoing curly brackets on a single line if statement is not ideal for maintainability and readability.
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Eclipse JUNO doesn't start
When I launch Eclipse, it does not start.
An error appears and tells me to see the log file.
"See the log file: /Users/max/work/projects/.metadata/.log"
OS: MacOS 10.7.4
Eclipse: 4.2 Juno
ADT: 20
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Heroku deployment error H10 (App crashed)
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I ran into the same error above, app was crashing on heroku (running fine in dev) but error logs on heroku were not revealing any clues. I read other answers on this page and broke out in a sweat after seeing "rebuilding the app." I figured...
Passing an array as a function parameter in JavaScript
I'd like to call a function using an array as parameters:
10 Answers
10
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Error: The 'brew link' step did not complete successfully
I'm trying to install node.js via Homebrew. Unfortunately, I get this error:
21 Answers
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Android Studio suddenly cannot resolve symbols
...tion had stopped working. I look at the imports and AS seems to be telling me it can't find android.support.v4 all of a sudden (offering me the option to remove the unused imports). ( android.support.v7 seems to be fine though).
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How to fix PCH error?
When I try to build my app in Xcode , I get this error message:
22 Answers
22
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How to find all positions of the maximum value in a list?
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>>> m = max(a)
>>> [i for i, j in enumerate(a) if j == m]
[9, 12]
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How to install therubyracer gem on 10.10 Yosemite?
... #note that libv8 version may change, so tab through files in pkg/, also remember to use the one with version specified
then just bundle your project gems
this is the only way it worked for me on 10.10 (ruby 2.1.2)
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