URIs identify and URLs locate; however, locators are also identifiers, so every URL is also a URI, but there are URIs which are not URLs. Examples Roger Pate This is my name, which is an identifier. It is like a URI, but cannot be a URL, as it tells you nothing about my location or … Read more
You can apply this CSS to the inner <div>: #inner { width: 50%; margin: 0 auto; } Of course, you don’t have to set the width to 50%. Any width less than the containing <div> will work. The margin: 0 auto is what does the actual centering. If you are targeting Internet Explorer 8 (and later), it … Read more
Incrementing / Decrementing Operators ++ increment operator — decrement operator Example Name Effect ——————————————————————— ++$a Pre-increment Increments $a by one, then returns $a. $a++ Post-increment Returns $a, then increments $a by one. –$a Pre-decrement Decrements $a by one, then returns $a. $a– Post-decrement Returns $a, then decrements $a by one. These can go before or … Read more
[Edited 2021-10-16 to reflect latest best-practices for producing RFC4122-compliant UUIDs] Most readers here will want to use the uuid module. It is well-tested and supported. The crypto.randomUUID() function is an emerging standard that is supported in Node.js and an increasing number of browsers. If neither of those work for you, there is this method (based … Read more
The notion that regex doesn’t support inverse matching is not entirely true. You can mimic this behavior by using negative look-arounds: ^((?!hede).)*$ Non-capturing variant: ^(?:(?!:hede).)*$ The regex above will match any string, or line without a line break, not containing the (sub)string ‘hede’. As mentioned, this is not something regex is “good” at (or should … Read more
To obtain only the remote URL: git config –get remote.origin.url If you require full output, and you are on a network that can reach the remote repo where the origin resides: git remote show origin When using git clone (from GitHub, or any source repository for that matter) the default name for the source of … Read more
Another way to make a directory stay (almost) empty (in the repository) is to create a .gitignore file inside that directory that contains these four lines: # Ignore everything in this directory * # Except this file !.gitignore Then you don’t have to get the order right the way that you have to do in … Read more
How do I successfully query the checked property? The checked property of a checkbox DOM element will give you the checked state of the element. Given your existing code, you could therefore do this: if(document.getElementById(‘isAgeSelected’).checked) { $(“#txtAge”).show(); } else { $(“#txtAge”).hide(); } However, there’s a much prettier way to do this, using toggle: $(‘#isAgeSelected’).click(function() { … Read more
Setting your branch to exactly match the remote branch can be done in two steps: git fetch origin git reset –hard origin/master If you want to save your current branch’s state before doing this (just in case), you can do: git commit -a -m “Saving my work, just in case” git branch my-saved-work Now your … Read more
Assuming you’re joining on columns with no duplicates, which is a very common case: An inner join of A and B gives the result of A intersect B, i.e. the inner part of a Venn diagram intersection. An outer join of A and B gives the results of A union B, i.e. the outer parts … Read more