programtip

understanding private setters I don't understand the need of having private setters which started with C# 2. Having a setter method for me is letting the user to set some variables in that class. In doing so, we will not expose the variables directly to the users. Instead we let them do it through this public setter method. This for me is using "encapsulation". There are some arguments out there..

Is there a way to remove unused imports and declarations from Angular 2+? I'm assigned to take some messed code from other developers who have already left the company recently. I am curiously asking is there some plug-in of Visual Studio Code or other means that could help us to tidy and organize the imports and references quickly and effectively? For example, there are maybe hundreds of import..

Remove empty properties / falsy values from Object with Underscore.js I have an object with several properties. I would like to remove any properties that have falsy values. This can be achieved with compact on arrays, but what about objects? You could make your own underscore plugin (mixin) : _.mixin({ compactObject: function(o) { _.each(o, function(v, k) { if(!v) { delete o[k]; } }); return o;..

Best javascript syntactic sugar Here are some gems: Literals: var obj = {}; // Object literal, equivalent to var obj = new Object(); var arr = []; // Array literal, equivalent to var arr = new Array(); var regex = /something/; // Regular expression literal, equivalent to var regex = new RegExp('something'); Defaults: arg = arg || 'default'; // if arg evaluates to false, use 'default', which is t..

Android Database Transaction I have created a database. I want to do the Transaction. SaveCustomer() contains more than one statement to insert records into Customer, CustomerControl, Profile, Payment table at that time. When a user calls SaveCustomer() method then that data will go to these 4 tables.so How can I do the transaction? If one table inserts failed then need to roll back everything. ..

What does the third parameter (false) indicate in document.addEventListener(“deviceready”,OnDeviceReady,false); [duplicate] This question already has an answer here: Why is 'false' used after this simple addEventListener function? 4 answers What does the third parameter (false) indicate in document.addEventListener("deviceready",OnDeviceReady,false); Can any one show an example script to show th..

How can I transform between the two styles of public key format, one “BEGIN RSA PUBLIC KEY”, the other is “BEGIN PUBLIC KEY” How can I transform between the two styles of public key format, one format is: -----BEGIN PUBLIC KEY----- ... -----END PUBLIC KEY----- the other format is: -----BEGIN RSA PUBLIC KEY----- ... -----END RSA PUBLIC KEY----- for example I generated id_rsa/id_rsa.pub pair using..

pgadmin4 : postgresql application server could not be contacted. I have installed PostgreSQL 9.6.2 on my Windows 8.1. But the pgadmin4 is not able to contact the local server. I have tried several solutions suggested here in stackoverflow, tried to uninstall and reinstall PostgreSQL 9.6.2 , tried to modify the config.py, config_distro.py, and delete the files in Roaming folder,i tried standalone..

SSL backend error when using OpenSSL I was trying to install pycurl in a virtualenv using pip and I got this error ImportError: pycurl: libcurl link-time ssl backend (openssl) is different from compile-time ssl backend (none/other) I read some documentation saying that "To fix this, you need to tell setup.py what SSL backend is used" (source) although I am not sure how to do this since I install..

Bootstrap close responsive menu “on click” On "PRODUCTS" click I slide up a white div (as seen in attached). When in responsive (mobile and tablet), I would like to automaticly close the responsive navbar and only show the white bar. I tried: $('.btn-navbar').click(); also tried: $('.nav-collapse').toggle(); And it does work. However in desktop size, it is also called and does something funky to..