When working with TypeScript, there is a big chance that you will have to deal with a “duplicate identifier” error sooner or later.
But what exactly this error means? Read the error text again. Duplicate identifier. You are defining, with other words referencing, the same identifier (class, method, property) twice in your code.
Read the complete articleFor those who are wondering what exactly the null coalescing operator is, consider the following example:
var a = null;
var b = a || 10;
console.log(b); // It will log 10It is very probably that you already used such code in your programs. In the previous example, with the || operator we are practically set the number 10 to variable b, if the value inside variable a is null.
Read the complete articleAfter I installed the jekyll-sitemap gem on my Jekyll website and tried to register the generated sitemap in my Google webmaster account, I received from Google the following error:
Invalid tag value. This XML tag has an invalid value. Please fix it and resubmit.
Read the complete articleThe following list contains my favorite keyboard-shortcuts in Visual Studio:
ctrl + K + C (Press Control, K and C): Comments out the selected lines of code.
ctrl + K + U (Press Control, K and U): Uncomments the selected commented lines of code.
The following list contains npm commands that I use practically every day while working with npm packages in my node.js projects:
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