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How to delete a specific line in a file?
...o strip("\n") the newline character in the comparison because if your file doesn't end with a newline character the very last line won't either.
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What is a magic number, and why is it bad? [closed]
...lic class Foo {
public void setPassword(String password) {
// don't do this
if (password.length() > 7) {
throw new InvalidArgumentException("password");
}
}
}
This should be refactored to:
public class Foo {
public static final int MAX_PASSW...
Can I set variables to undefined or pass undefined as an argument?
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I'm a bit confused about Javascript undefined & null.
Don't be confused about null. It generally makes sense and behaves similarly to other scripting languages' concepts of the out-of-band ‘null’, ‘nil’ or ‘None’ objects.
undefined, on the other hand, is a weird Jav...
Event on a disabled input
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Disabled elements don't fire mouse events. Most browsers will propagate an event originating from the disabled element up the DOM tree, so event handlers could be placed on container elements. However, Firefox doesn't exhibit this behaviour,...
Java: How to convert List to Map
...y to convert List to Map in Java and if there any specific benefits of doing so.
18 Answers
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Understanding promises in Node.js
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Promises in node.js promised to do some work and then had separate callbacks that would be executed for success and failure as well as handling timeouts. Another way to think of promises in node.js was that they were emitters that could emit only two events...
Why does Python use 'magic methods'?
...is respect and has historical roots.
Here's a quote from the FAQ:
Why does Python use methods for some
functionality (e.g. list.index()) but
functions for other (e.g. len(list))?
The major reason is history. Functions
were used for those operations that
were generic for a group of ...
Check if an array is empty or exists
...preferable, for readability in the future, to "say what you mean". I would do .. && image_array.length > 0).
– ToolmakerSteve
Oct 12 '19 at 12:17
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How to Append in javascript? [duplicate]
...d to use childappend or jquery append() to append some tag stuff into the document. From what I can tell, this is getting stripped out. Anyone know how to do it?
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git: undo all working dir changes including new files
...ing directory including new untracked files. I know that git checkout -f does that, but it doesn't delete new untracked files created since last commit.
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