The old versions of JavaScript had no import, include, or require, so many different approaches to this problem have been developed. But since 2015 (ES6), JavaScript has had the ES6 modules standard to import modules in Node.js, which is also supported by most modern browsers. For compatibility with older browsers, build tools like Webpack and … Read more
Overall: Both PUT and POST can be used for creating. You have to ask, “what are you performing the action upon?”, to distinguish what you should be using. Let’s assume you’re designing an API for asking questions. If you want to use POST, then you would do that to a list of questions. If you … Read more
Moving to an existing branch If you want to move your commits to an existing branch, it will look like this: git checkout existingbranch git merge master git checkout master git reset –hard HEAD~3 # Go back 3 commits. You *will* lose uncommitted work. git checkout existingbranch You can store uncommitted edits to your stash … Read more
From the Android Developer Documentation: px Pixels – corresponds to actual pixels on the screen. in Inches – based on the physical size of the screen. 1 Inch OR 2.54 centimeters mm > Millimeters – based on the physical size of the screen. pt > Points – 1/72 of an inch based on the physical … Read more
How can I merge two Python dictionaries in a single expression? For dictionaries x and y, their shallowly-merged dictionary z takes values from y, replacing those from x. In Python 3.9.0 or greater (released 17 October 2020, PEP-584, discussed here): z = x | y In Python 3.5 or greater: z = {**x, **y} In … Read more
→ For a more general explanation of asynchronous behaviour with different examples, see Why is my variable unaltered after I modify it inside of a function? – Asynchronous code reference → If you already understand the problem, skip to the possible solutions below. The problem The A in Ajax stands for asynchronous. That means sending … Read more
If the reason you’re checking is so you can do something like if file_exists: open_it(), it’s safer to use a try around the attempt to open it. Checking and then opening risks the file being deleted or moved or something between when you check and when you try to open it. If you’re not planning … Read more
Do the following: grep -rnw ‘/path/to/somewhere/’ -e ‘pattern’ -r or -R is recursive, -n is line number, and -w stands for match the whole word. -l (lower-case L) can be added to just give the file name of matching files. -e is the pattern used during the search Along with these, –exclude, –include, –exclude-dir flags … Read more
Classes as objects Before understanding metaclasses, you need to master classes in Python. And Python has a very peculiar idea of what classes are, borrowed from the Smalltalk language. In most languages, classes are just pieces of code that describe how to produce an object. That’s kinda true in Python too: >>> class ObjectCreator(object): … … Read more
To remove a property from an object (mutating the object), you can do it like this: delete myObject.regex; // or, delete myObject[‘regex’]; // or, var prop = “regex”; delete myObject[prop]; Demo var myObject = { “ircEvent”: “PRIVMSG”, “method”: “newURI”, “regex”: “^http://.*” }; delete myObject.regex; console.log(myObject); For anyone interested in reading more about it, Stack Overflow … Read more