No error , No gain

Want to improve this post? Provide detailed answers to this question, including citations and an explanation of why your answer is correct. Answers without enough detail may be edited or deleted. Closed. This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 3..

How do I select the element that is a direct parent of the anchor element? As an example, my CSS would be something like this: li < a.active { property: value; } Obviously there are ways of doing this with JavaScript, but I'm hoping that there is some sort of workaround that exists native to CSS Level 2. The menu that I am trying to style is being spewed out by a CMS, so I can't move the active ..

How can I view the change history of an individual file in Git, complete details with what has changed? I have got as far as: git log -- [filename] which shows me the commit history of the file, but how do I get at the content of each of the file changes? I'm trying to make the transition from Microsoft Visual SourceSafe and that used to be a simple right-click → Show history. For a graphical vi..

I know references are syntactic sugar, so code is easier to read and write. But what is the difference between a pointer variable and a reference variable? A pointer can be re-assigned: int x = 5; int y = 6; int *p; p = &x; p = &y; *p = 10; assert(x == 5); assert(y == 10); A reference cannot be re-bound, and must be bound at initialization: int x = 5; int y = 6; int &q; // error int &r = x; A po..

Until today, I thought that for example: i += j; Was just a shortcut for: i = i + j; But if we try this: int i = 5; long j = 8; Then i = i + j; will not compile but i += j; will compile fine. Does it mean that in fact i += j; is a shortcut for something like this i = (type of i) (i + j)? As always with these questions, the JLS holds the answer. In this case §15.26.2 Compound Assignment Operators..

I'd like to round at most 2 decimal places, but only if necessary. Input: 10 1.7777777 9.1 Output: 10 1.78 9.1 How can I do this in JavaScript? Use Math.round() : Math.round(num * 100) / 100 Or to be more specific and to ensure things like 1.005 round correctly, use Number.EPSILON : Math.round((num + Number.EPSILON) * 100) / 100 Brian Ustas If the value is a text type: parseFloat("123.456").toFi..

Is there a (Unix) shell script to format JSON in human-readable form? Basically, I want it to transform the following: { "foo": "lorem", "bar": "ipsum" } ... into something like this: { "foo": "lorem", "bar": "ipsum" } With Python 2.6+ you can do: echo '{"foo": "lorem", "bar": "ipsum"}' | python -m json.tool or, if the JSON is in a file, you can do: python -m json.tool my_json.json if the JSON i..

This question already has answers here: How do I efficiently iterate over each entry in a Java Map? (46 answers) Closed 1 year ago. What's the best way to iterate over the items in a HashMap? If you're only interested in the keys, you can iterate through the keySet() of the map: Map map = ...; for (String key : map.keySet()) { // ... } If you only need the values, use values(): for (Object value..

What is the module/method used to get the current time? Use: >>> import datetime >>> datetime.datetime.now() datetime.datetime(2009, 1, 6, 15, 8, 24, 78915) >>> print(datetime.datetime.now()) 2009-01-06 15:08:24.789150 And just the time: >>> datetime.datetime.now().time() datetime.time(15, 8, 24, 78915) >>> print(datetime.datetime.now().time()) 15:08:24.789150 See the documentation for more info..

This question already has answers here: How do I clone a single branch in Git? (22 answers) Closed 7 years ago. Git clone will clone remote branch into local. Is there any way to clone a specific branch by myself without switching branches on the remote repository? git clone -b Example: git clone -b my-branch git@github.com:user/myproject.git With Git 1.7.10 and later, add --single-branch to pre..

What are the differences between a Service, Provider and Factory in AngularJS? From the AngularJS mailing list I got an amazing thread that explains service vs factory vs provider and their injection usage. Compiling the answers: Services Syntax: module.service( 'serviceName', function ); Result: When declaring serviceName as an injectable argument you will be provided with an instance of the fu..

In Java you can use a for loop to traverse objects in an array as follows: String[] myStringArray = {"Hello", "World"}; for (String s : myStringArray) { // Do something } Can you do the same in JavaScript? Three main options: for (var i = 0; i console.log(x)); for (const x of xs) { console.log(x); } Detailed examples are below. 1. Se..

In Swing, the password field has a getPassword() (returns char[]) method instead of the usual getText() (returns String) method. Similarly, I have come across a suggestion not to use String to handle passwords. Why does String pose a threat to security when it comes to passwords? It feels inconvenient to use char[]. Strings are immutable. That means once you've created the String, if another pro..

I would like to grep for a string, but also show the preceding five lines and the following five lines as well as the matched line. How would I be able to do this? For BSD or GNU grep you can use -B num to set how many lines before the match and -A num for the number of lines after the match. grep -B 3 -A 2 foo README.txt If you want the same number of lines before and after you can use -C num. ..

What is the best way to copy text to the clipboard (multi-browser)? I have tried: function copyToClipboard(text) { if (window.clipboardData) { // Internet Explorer window.clipboardData.setData("Text", text); } else { unsafeWindow.netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect"); const clipboardHelper = Components.classes["@mozilla.org/widget/clipboardhelper;1"].getService..

I clone my repository with: git clone ssh://xxxxx/xx.git But after I change some files and add and commit them, I want to push them to the server: git add xxx.php git commit -m "TEST" git push origin master But the error I get back is: error: src refspec master does not match any. error: failed to push some refs to 'ssh://xxxxx.com/project.git' Maybe you just need to commit. I ran into this when..

I use Ubuntu and installed cURL on it. I want to test my Spring REST application with cURL. I wrote my POST code at the Java side. However, I want to test it with cURL. I am trying to post a JSON data. Example data is like this: {"value":"30","type":"Tip 3","targetModule":"Target 3","configurationGroup":null,"name":"Configuration Deneme 3","description":null,"identity":"Configuration Deneme 3","..

This question's answers are a community effort. Edit existing answers to improve this post. It is not currently accepting new answers or interactions. I have a dictionary of values read from two fields in a database: a string field and a numeric field. The string field is unique, so that is the key of the dictionary. I can sort on the keys, but how can I sort based on the values? Note: I have re..

I have an array that is initialized like: Element[] array = {new Element(1), new Element(2), new Element(3)}; I would like to convert this array into an object of the ArrayList class. ArrayList arraylist = ???; new ArrayList(Arrays.asList(array)); Tom Given: Element[] array = new Element[] { new Element(1), new Element(2), new Element(3) }; The simplest answer is to do: List list = Arrays.asList..

How do I remove a Git submodule? By the way, is there a reason I can't simply do git submodule rm whatever ? Via the page Git Submodule Tutorial: To remove a submodule you need to: Delete the relevant section from the .gitmodules file. Stage the .gitmodules changes: git add .gitmodules Delete the relevant section from .git/config. Remove the submodule files from the working tree and index: git r..