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Can I pass parameters by reference in Java?
...ue. However for a parameter of reference type (i.e. not a parameter of primitive type) it is the reference itself which is passed by value, hence it appears to be pass-by-reference (and people often claim that it is). This is not the case, as shown by the following:
Object o = "Hello";
mutate(o)
Sy...
How to remove a directory from git repository?
I have 2 directories on my GitHub repository. I'd like to delete one of them. How could I do that without deleting and re-creating entire repository?
...
Setting PayPal return URL and making it auto return?
...
You have to enable auto return in your PayPal account, otherwise it will ignore the return field.
From the documentation (updated to reflect new layout Jan 2019):
Auto Return is turned off by default.
To turn on Auto Return:
Log in to your PayPal account at https://www.paypa...
What are the differences between Clojure, Scheme/Racket and Common Lisp?
...ynamic languages
Strongly typed
Compiled
Lisp-style syntax, i.e. code is written as a Lisp data structures (forms) with the most common pattern being function calls like: (function-name arg1 arg2)
Powerful macro systems that allow you to treat code as data and generate arbitrary code at runtime (oft...
How to detect the screen resolution with JavaScript?
...To get the native resolution of i.e. a mobile device you have to multiply with the device pixel ratio: window.screen.width * window.devicePixelRatio and window.screen.height * window.devicePixelRatio. This will also work on desktops, which will have a ratio of 1.
And from Ben in another answer:
In...
How do I get the current date in JavaScript?
... = today.getFullYear();
today = mm + '/' + dd + '/' + yyyy;
document.write(today);
This will give you today's date in the format of mm/dd/yyyy.
Simply change today = mm +'/'+ dd +'/'+ yyyy; to whatever format you wish.
...
What does placing a @ in front of a C# variable name do? [duplicate]
I've been working with some C# legacy code and I've been seeing a lot of @ symbols in front of variable names. What does this signify or do?
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How to check if type of a variable is string?
...s, basestring)
basestring is the abstract superclass of str and unicode. It can be used to test whether an object is an instance of str or unicode.
In Python 3.x, the correct test is
isinstance(s, str)
The bytes class isn't considered a string type in Python 3.
...
:first-child not working as expected
I'm trying to select the first h1 inside a div with a class called detail_container . It works if h1 is the first element within this div , but if it comes after this ul it won't work.
...
parseInt vs unary plus, when to use which?
... I know of:
An empty string "" evaluates to a 0, while parseInt evaluates it to NaN. IMO, a blank string should be a NaN.
+'' === 0; //true
isNaN(parseInt('',10)); //true
The unary + acts more like parseFloat since it also accepts decimals.
parseInt on the other hand stops parsin...