No error , No gain

People talk about URLs, URIs, and URNs as if they're different things, but they look the same to the naked eye. What are the distinguishable differences between them? 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 ..

I'm stuck and cannot escape. It says: "type :quit to quit VIM" But when I type that it simply appears in the object body. Hit the Esc key to enter "Normal mode". Then you can type : to enter "Command-line mode". A colon (:) will appear at the bottom of the screen and you can type in one of the following commands. To execute a command, press the Enter key. :q to quit (short for :quit) :q! to quit..

I have a repo (origin) on a USB key that I cloned on my hard drive (local). I moved "origin" to a NAS and successfully tested cloning it from here. I would like to know if I can change the URI of "origin" in the settings of "local" so it will now pull from the NAS, and not from the USB key. For now, I can see two solutions: push everything to the usb-orign, and copy it to the NAS again (implies ..

What exactly is RESTful programming? REST is the underlying architectural principle of the web. The amazing thing about the web is the fact that clients (browsers) and servers can interact in complex ways without the client knowing anything beforehand about the server and the resources it hosts. The key constraint is that the server and client must both agree on the media used, which in the case..

I pulled a project from GitHub a few days ago. I've since discovered that there are several forks on GitHub, and I neglected to note which one I took originally. How can I determine which of those forks I pulled? If you want only the remote URL, or if your are not connected to a network that can reach the remote repo: git config --get remote.origin.url If you require full output and you are on a..

I want to resolve merge conflicts in my Git repository. How can I do that? Try: git mergetool It opens a GUI that steps you through each conflict, and you get to choose how to merge. Sometimes it requires a bit of hand editing afterwards, but usually it's enough by itself. It is much better than doing the whole thing by hand certainly. As per Josh Glover's comment: The command doesn't necessaril..

The following are two methods of building a link that has the sole purpose of running JavaScript code. Which is better, in terms of functionality, page load speed, validation purposes, etc.? function myJsFunc() { alert("myJsFunc"); } Run JavaScript Code or function myJsFunc() { alert("myJsFunc"); } Run JavaScript Code I use javascript:void(0). Three reasons. Encouraging the use of # amongst a te..

Chrome supports the placeholder attribute on input[type=text] elements (others probably do too). But the following CSS doesn't do anything to the placeholder's value: input[placeholder], [placeholder], *[placeholder] { color: red !important; } But Value will still remain grey instead of red. Is there a way to change the color of the placeholder text? Implementation There are three different impl..

We have an employee whose surname is Null. Our employee lookup application is killed when that last name is used as the search term (which happens to be quite often now). The error received (thanks Fiddler!) is: soapenv:Server.userException coldfusion.xml.rpc.CFCInvocationException: [coldfusion.runtime.MissingArgumentException : The SEARCHSTRING parameter to the getFacultyNames function is requi..

What is the most elegant way to check if the directory a file is going to be written to exists, and if not, create the directory using Python? Here is what I tried: import os file_path = "/my/directory/filename.txt" directory = os.path.dirname(file_path) try: os.stat(directory) except: os.mkdir(directory) f = file(filename) Somehow, I missed os.path.exists (thanks kanja, Blair, and Douglas). Thi..

I need to check the checked property of a checkbox and perform an action based on the checked property using jQuery. For example, if the age checkbox is checked, then I need to show a textbox to enter age, else hide the textbox. But the following code returns false by default: if ($('#isAgeSelected').attr('checked')) { $("#txtAge").show(); } else { $("#txtAge").hide(); } Age is selected How do I..

I'm trying to create globally-unique identifiers in JavaScript. I'm not sure what routines are available on all browsers, how "random" and seeded the built-in random number generator is, etc. The GUID / UUID should be at least 32 characters and should stay in the ASCII range to avoid trouble when passing them around. For an RFC4122 version 4 compliant solution, this one-liner(ish) solution is th..

What is the difference between a function decorated with @staticmethod and one decorated with @classmethod? Maybe a bit of example code will help: Notice the difference in the call signatures of foo, class_foo and static_foo: class A(object): def foo(self, x): print(f"executing foo({self}, {x})") @classmethod def class_foo(cls, x): print(f"executing class_foo({cls}, {x})") @staticmethod def stat..

How can I horizontally center a within another using CSS? Foo foo You can apply this CSS to the inner : #inner { width: 50%; margin: 0 auto; } Of course, you don't have to set the width to 50%. Any width less than the containing will work. The margin: 0 auto is what does the actual centering. If you are targeting Internet Explorer 8 (and later), it might be better to have this instead: #inner { ..

How do I reset my local branch to be just like the branch on the remote repository? I did: git reset --hard HEAD But when I run a git status, On branch master Changes to be committed: (use "git reset HEAD ..." to unstage) modified: java/com/mycompany/TestContacts.java modified: java/com/mycompany/TestParser.java Can you please tell me why I have these 'modified'? I haven't touched these files? I..

Why does Google prepend while(1); to their (private) JSON responses? For example, here's a response while turning a calendar on and off in Google Calendar: while (1); [ ['u', [ ['smsSentFlag', 'false'], ['hideInvitations', 'false'], ['remindOnRespondedEventsOnly', 'true'], ['hideInvitations_remindOnRespondedEventsOnly', 'false_true'], ['Calendar ID stripped for privacy', 'false'], ['smsVerifiedF..

This question's answers are a community effort. Edit existing answers to improve this post. It is not currently accepting new answers or interactions. This question attempts to collect the few pearls among the dozens of bad C++ books that are published every year. Unlike many other programming languages, which are often picked up on the go from tutorials found on the Internet, few are able to qu..

Is there a regular expression to verify an email address in JavaScript? Using regular expressions is probably the best way. You can see a bunch of tests here (taken from chromium) function validateEmail(email) { const re = /^(([^()[\]\\.,;:\s@"]+(\.[^()[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/; return re.test(String(emai..

I have this string in my JavaScript code: "Test abc test test abc test test test abc test test abc" Doing: str = str.replace('abc', ''); Seems to only remove the first occurrence of abc in the string above. How can I replace all occurrences of it? As of August 2020: Modern browsers have support for the String.replaceAll() method defined by the ECMAScript 2021 language specification. For older/le..

How can I loop through all the entries in an array using JavaScript? I thought it was something like this: forEach(instance in theArray) Where theArray is my array, but this seems to be incorrect. TL;DR Your best bets are usually a for-of loop (ES2015+ only; spec | MDN) - simple and async-friendly forEach (ES5+ only; spec | MDN) (or its relatives some and such) - not async-friendly (but see deta..