Tarik Billa ECMAScript 6 introduced String.prototype.includes: const string = “foo”; const substring = “oo”; console.log(string.includes(substring)); // true includes doesn’t have Internet Explorer support, though. In ECMAScript 5 or older environments, use String.prototype.indexOf, which returns -1 when a substring cannot be found: var string = “foo”; var substring = “oo”; console.log(string.indexOf(substring) !== -1); // true
git-clean – Remove untracked files from the working tree Synopsis git clean [-d] [-f] [-i] [-n] [-q] [-e <pattern>] [-x | -X] [–] <path>… Description Cleans the working tree by recursively removing files that are not under version control, starting from the current directory. Normally, only files unknown to Git are removed, but if the … Read more
This depends a lot on what you mean by “revert”. Temporarily switch to a different commit If you want to temporarily go back to it, fool around, then come back to where you are, all you have to do is check out the desired commit: # This will detach your HEAD, that is, leave you … Read more
A closure is a pairing of: A function and A reference to that function’s outer scope (lexical environment) A lexical environment is part of every execution context (stack frame) and is a map between identifiers (i.e. local variable names) and values. Every function in JavaScript maintains a reference to its outer lexical environment. This reference … Read more
Amending the most recent commit message git commit –amend will open your editor, allowing you to change the commit message of the most recent commit. Additionally, you can set the commit message directly in the command line with: git commit –amend -m “New commit message” …however, this can make multi-line commit messages or small corrections … Read more
One does not simply redirect using jQuery jQuery is not necessary, and window.location.replace(…) will best simulate an HTTP redirect. window.location.replace(…) is better than using window.location.href, because replace() does not keep the originating page in the session history, meaning the user won’t get stuck in a never-ending back-button fiasco. If you want to simulate someone clicking … Read more
The answer has been split depending on whether there is one remote repository configured or multiple. The reason for this is that for the single remote case, some of the commands can be simplified as there is less ambiguity. Updated for Git 2.23: For older versions, see the section at the end. With One Remote … Read more
Update for ES6 modules Inside native ECMAScript modules (with import and export statements) and ES6 classes, strict mode is always enabled and cannot be disabled. Original answer This article about Javascript Strict Mode might interest you: John Resig – ECMAScript 5 Strict Mode, JSON, and More To quote some interesting parts: Strict Mode is a … Read more
Since the question refers to a single element, this code might be more suitable: // Checks CSS content for display:[none|block], ignores visibility:[true|false] $(element).is(“:visible”); // The same works with hidden $(element).is(“:hidden”); It is the same as twernt’s suggestion, but applied to a single element; and it matches the algorithm recommended in the jQuery FAQ. We use … Read more
It’s a holdover from the Netscape days: Missing digits are treated as 0[…]. An incorrect digit is simply interpreted as 0. For example the values #F0F0F0, F0F0F0, F0F0F, #FxFxFx and FxFxFx are all the same. It is from the blog post A little rant about Microsoft Internet Explorer’s color parsing which covers it in great … Read more