Author: admin
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Is it possible to evaluate simple expressions using Node REPL?
Yes. You can evaluate simple expressions using Node REPL.
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Heredoc & Nowdoc
PHP provides two alternatives for declaring single or double quoted strings in the form of heredoc and newdoc syntax. Heredoc Strings in PHP The heredoc strings in PHP are much like double-quoted strings, without the double-quotes. It means that they don’t need to escape quotes and expand variables. Heredoc Syntax First, start with the “<<<” operator. After this operator,…
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Explain the tasks of terms used in Node REPL.
Following are the terms used in REPL with their defined tasks: Read: It reads user’s input; parse the input into JavaScript data-structure and stores in memory. Eval: It takes and evaluates the data structure. Print: It is used to print the result. Loop: It loops the above command until user press ctrl-c twice to terminate.
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Maths Functions
To enable mathematical operations, PHP has mathematical (arithmetic) operators and a number of mathematical functions. In this chapter, the following mathematical functions are explained with examples. PHP abs() Function The abs() function is an in-built function in PHP iterpreter. This function accepts any number as argument and returns a positive value, disregarding its sign. Absolute…
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What is REPL in Node.js?
REPL stands for Read Eval Print Loop. It specifies a computer environment like a window console or Unix/Linux shell where you can enter a command, and the computer responds with an output. It is very useful in writing and debugging the codes. REPL environment incorporates Node.js. See the Example:
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Is it possible to access DOM in Node?
No, it is not possible to access DOM in Node.
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How “Control Flow” controls the functions calls?
The control flow does the following job:
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What is a control flow function?
Control flow function is a generic piece of code that runs in between several asynchronous function calls.
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Does Node.js provide Debugger?
Yes, Node.js provides a simple TCP based protocol and built-in debugging client. For debugging your JavaScript file, you can use debug argument followed by the js file name you want to debug. Syntax: