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How to pass objects to functions in C++?
... C tmp = a;
a = b;
b = tmp;
}
public static void main( String args[] ) {
C a = new C();
C b = new C();
C old_a = a;
C old_b = b;
swap( a, b );
// a and b remain unchanged a==old_a, and b==old_b
}
}
The Java version of the code will modify...
Insert HTML with React Variable Statements (JSX)
...rouslySetInnerHTML can be dangerous if you do not know what is in the HTML string you are injecting. This is because malicious client side code can be injected via script tags.
It is probably a good idea to sanitize the HTML string via a utility such as DOMPurify if you are not 100% sure the HTML y...
How to launch Safari and open URL from iOS app
...:(id)sender {
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"http://www.daledietrich.com"]];
}
Swift
(IBAction in viewController, rather than header file)
if let link = URL(string: "https://yoursite.com") {
UIApplication.shared.open(link)
}
...
Regular Expression: Any character that is NOT a letter or number
...lace(/[^\w]/);
It will replace all the non-alphabets and numbers from your string!
Edit 1: str.replace(/[^\w]/g, ' ')
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How can I convert a string to a number in Perl?
I have a string which holds a decimal value in it and I need to convert that string into a floating point variable. So an example of the string I have is "5.45" and I want a floating point equivalent so I can add .1 to it. I have searched around the internet, but I only see how to convert a string t...
What exactly are iterator, iterable, and iteration?
... ITERABLE is:
anything that can be looped over (i.e. you can loop over a string or file) or
anything that can appear on the right-side of a for-loop: for x in iterable: ... or
anything you can call with iter() that will return an ITERATOR: iter(obj) or
an object that defines __iter__ that retur...
How do I run a spring boot executable jar in a Production environment?
...otApplication
public class MyAppInitializer {
public static void main(String[] args) {
SpringApplication.run(MyAppInitializer .class, args);
}
}
My Initializer for production environment extends the SpringBootServletInitializer and looks like this:
@SpringBootApplication
public ...
How to create a drop-down list?
...n = findViewById(R.id.spinner1);
//create a list of items for the spinner.
String[] items = new String[]{"1", "2", "three"};
//create an adapter to describe how the items are displayed, adapters are used in several places in android.
//There are multiple variations of this, but this is the basic var...
How to save an image to localStorage and display it on the next page?
...ith getElementByID, and save the image as a Base64. Then I save the Base64 string as my localStorage value.
bannerImage = document.getElementById('bannerImg');
imgData = getBase64Image(bannerImage);
localStorage.setItem("imgData", imgData);
Here is the function that converts the image to a Base64...
Add a prefix to all Flask routes
...nes a new route function with a prefix.
The mask argument is a `format string` formatted with, in that order:
prefix, route
'''
def newroute(route, *args, **kwargs):
'''New function to prefix the route'''
return route_function(mask.format(prefix, route), *args, **kwargs)
retu...