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What is the difference between null and undefined in JavaScript?
...null;
alert(TestVar); //shows null
alert(typeof TestVar); //shows object
From the preceding examples, it is clear that undefined and null are two distinct types: undefined is a type itself (undefined) while null is an object.
null === undefined // false
null == undefined // true
null === null // ...
How to return a result from a VBA function
How do I return a result from a function?
4 Answers
4
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Eclipse hangs at the Android SDK Content Loader
...ctly:
Make sure that eclipse is not active. If it is active kill eclipse from the processes tab of the task manager
Open %USERPROFILE%/ on Windows or simply ~ on Linux/OS X (You can locate this folder from the Desktop)
Go to .android folder (This may be a hidden folder)
Delete the folder cache wh...
Run R script from command line
...@Dason I am also working with R script and I am trying to execute R script from Java program and I am seeing some error. Here is my question. See if you can help out. I am using your hello function example for now to make it simple.
– user1950349
Sep 16 '15 at ...
Check whether user has a Chrome extension installed
... hmmm chrome.extension.connect only seems to work when executed from within the extension (or any extension). I need it to work from any random js script. Any ideas?
– user179169
Jun 9 '11 at 13:55
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Delete last commit in bitbucket
...o cause them significant annoyance), then it is possible to remove commits from bitbucket branches.
If you're trying to change a non-master branch:
git reset HEAD^ # remove the last commit from the branch history
git push origin :branch_name # delete the branch from bitbucket
git pu...
What's the difference between an inverted index and a plain old index?
...indexes - it's just a question of which direction you're going. Forward is from documents->to->words, inverted is from words->to->documents.
Example 2: DNS
Another example is a DNS lookup (which takes a host name, and returns an IP address) and a reverse lookup (which takes an IP add...
Android List View Drag and Drop sort
...plement for RecyclerView with ItemTouchHelper. Just override onMove method from ItemTouchHelper.Callback:
@Override
public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, RecyclerView.ViewHolder target) {
mMovieAdapter.swap(viewHolder.getAdapterPosition(), target....
Add native files from NuGet package to project output directory
...sing a powershell script (which will only be run inside Visual Studio, not from the command prompt, on build servers or in other IDEs, and is not supported in project.json / xproj DNX projects) and I prefer to use a Link to the files rather than having an additional copy of the files within the proj...
Check if Python Package is installed
...k if a package is installed while within a Python script? I know it's easy from the interpreter, but I need to do it within a script.
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