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What is the most efficient way to deep clone an object in JavaScript?
...
Native deep cloning
It's called "structured cloning", works experimentally in Node 11 and later, and hopefully will land in browsers. See this answer for more details.
Fast cloning with data loss - JSON.parse/stringify
If you do not use Dates, funct...
Printing without newline (print 'a',) prints a space, how to remove?
... This will consume a bit of memory for the string, but only make a single call to print. Note that string concatenation using += is now linear in the size of the string you're concatenating so this will be fast.
>>> for i in xrange(20):
... s += 'a'
...
>>> print s
aaaaaaaaaa...
Just what is an IntPtr exactly?
...st about size - the various pointers may be entirely incompatible. In an example closer to today, PAE would use 64-bit addresses even though the "native pointer size" was still 32-bit. It goes all the way back to the argument "what does '32-bit system' mean, really?" We have 256-bit and 512-bit nume...
GNU Makefile rule generating a few targets from a single source file
....intermediate won't exist before make is run, so its absence (or its timestamp) won't cause foo-bin to be run spuriously. And whether either file-a.out or file-b.out or both are out-of-date (relative to input.in), foo-bin will be only run once. You can use .SECONDARY instead of .INTERMEDIATE, whic...
How can I set the request header for curl?
...l request you simply add additional -H or --header to your curl command.
Example
//Simplified
$ curl -v -H 'header1:val' -H 'header2:val' URL
//Explanatory
$ curl -v -H 'Connection: keep-alive' -H 'Content-Type: application/json' https://www.example.com
Going Further
For standard HTTP header fiel...
What's a simple way to get a text input popup dialog box on an iPhone
...alert = [[UIAlertView alloc] initWithTitle:@"Alert" message:@"This is an example alert!" delegate:self cancelButtonTitle:@"Hide" otherButtonTitles:nil];
alert.alertViewStyle = UIAlertViewStylePlainTextInput;
[alert show];
[alert release];
This renders an alertView like this (screenshot taken from ...
When would you use the different git merge strategies?
...s:
Recursive
Recursive is the default for non-fast-forward merges. We're all familiar with that one.
Octopus
I've used octopus when I've had several trees that needed to be merged. You see this in larger projects where many branches have had independent development and it's all ready to come to...
Get the Highlighted/Selected text
...ext = window.getSelection().toString();
} else if (document.selection && document.selection.type != "Control") {
text = document.selection.createRange().text;
}
return text;
}
If you're interested in an implementation that will also deal with selections in <textarea&...
How to upgrade R in ubuntu? [closed]
...dd a line with the source from where the packages will be retrieved. For example:
deb https://cloud.r-project.org/bin/linux/ubuntu/ version/
Replace https://cloud.r-project.org with whatever mirror you would like to use, and replace
version/ with whatever version of Ubuntu you are using (eg, tru...
Error: invalid_client no application name
...
That error is displayed in case that under "APIs & auth" -> "Consent screen" you have empty field "PRODUCT NAME" - you need to select e-mail address as well.
You can find "Consent screen" under a link!, click on project name and then go to "APIs & auth" -> "Co...