static_cast `static_cast` is used for cases where you basically want to reverse an implicit conversion, with a few restrictions and additions. `static_cast` performs no runtime checks. This should be used if you know that you refer to an object of a specific type, and thus a check would be unnecessary. Example: In this example, you … Read more
This question already has answers here: Why can’t non-default arguments follow default arguments? (4 answers) Closed 3 years ago. I am a calling a function like this in python . Here is the code from the documentation of the function .. It is giving an error like this.. How to resolve this error ? Thanks … Read more
Using variables in if statements If you want to do something when they don’t match, replace = with !=. You can read more about string operations and arithmetic operations in their respective documentation. Why do we use quotes around $x? You want the quotes around $x, because if it is empty, your Bash script encounters … Read more
A lot of understanding came once I understood the Angular Lifecycle Hooks and their relationship with change detection. I was trying to get Angular to update a global flag bound to the *ngIf of an element, and I was trying to change that flag inside of the ngOnInit() life cycle hook of another component. According … Read more
A “const function”, denoted with the keyword const after a function declaration, makes it a compiler error for this class function to change a member variable of the class. However, reading of a class variables is okay inside of the function, but writing inside of this function will generate a compiler error. Another way of … Read more
No, not quite. Firstly, there’s a slight difference in semantics. If a is null, then a.concat(b) throws a NullPointerException but a+=b will treat the original value of a as if it were null. Furthermore, the concat() method only accepts String values while the + operator will silently convert the argument to a String (using the … Read more
Use the location header flag: curl -L <URL>
Here’s your example in the “one” line. Update: I thought I’d update this post since it still gets quite a bit of traffic. In the comments below there’s some discussion about $(“<div>”) vs $(“<div></div>”) vs $(document.createElement(‘div’)) as a way of creating new elements, and which is “best”. I put together a small benchmark, and here … Read more
Set the name attribute of your form to “theForm” and your code will work.
Given a sample dataframe df as: what you want is: that returns: