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How to check for an undefined or null variable in JavaScript?
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I think the most efficient way to test for "value is null or undefined" is
if ( some_variable == null ){
// some_variable is either null or undefined
}
So these two lines are equivalent:
if ( typeof(some_variable) !== "undefined" && some_variab...
Disable same origin policy in Chrome
...(or chromium) and restart with the --disable-web-security argument. I just tested this and verified that I can access the contents of an iframe with src="http://google.com" embedded in a page served from "localhost" (tested under chromium 5 / ubuntu). For me the exact command was:
Note : Kill all...
Loop through files in a folder using VBA?
... takes wild cards so you could make a big difference adding the filter for test up front and avoiding testing each file
Sub LoopThroughFiles()
Dim StrFile As String
StrFile = Dir("c:\testfolder\*test*")
Do While Len(StrFile) > 0
Debug.Print StrFile
StrFile = Dir
L...
Why is string concatenation faster than array join?
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I know this is an old thread, but your test is incorrect. You are doing output += myarray[i]; while it should be more like output += "" + myarray[i]; because you've forgot, that you have to glue items together with something. The concat code should be something li...
How to check if remote branch exists on a given remote repository?
...he most idiomatic solution. The result can be checked directly in a shell test or by checking the status variable $?.
$ git ls-remote --exit-code --heads git@github.com:user/repo.git branch-name
share
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What are the undocumented features and limitations of the Windows FINDSTR command?
... and BUG in part 2 of answer
Source of data to search (Updated based on tests with Windows 7)
Findstr can search data from only one of the following sources:
filenames specified as arguments and/or using the /F:file option.
stdin via redirection findstr "searchString" <file
data stream from...
In JavaScript can I make a “click” event fire programmatically for a file input element?
...t have the time to work my way through all 10+ flavors of relevant ones to test on.
– Yevgeny Simkin
Sep 15 '10 at 5:11
1
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Replacing spaces with underscores in JavaScript?
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Future people browsing this @Inez has a link to test both speeds of split/join VS. replace. As of late 2018 replace is significantly faster.
– ricks
Aug 17 '18 at 14:48
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Heroku NodeJS http to https ssl forced redirect
...alancer, before encrypted traffic reaches your node app. It is possible to test whether https was used to make the request with req.headers['x-forwarded-proto'] === 'https'.
We don't need to concern ourselves with having local SSL certificates inside the app etc as you might if hosting in other env...
AngularJS : automatically detect change in model
...elements according to it's state (modified/not modified) dynamically or to test whether some values has actually changed, you can use the following module, developed by myself:
https://github.com/betsol/angular-input-modified
It adds additional properties and methods to the form and it's child elem...