By Anto Aravinth
What you are going to Learn:
- Master practical programming concepts
- Understand real-world useful libraries and create a useful library that mimics underscore.js
- Perform pure-error dealing with ideas corresponding to functors and monads
- Discover ES6 sensible gains resembling unfold operators and generators
Who This booklet Is For:
How one can advance complex and effective web functions with Ext JS
About This Book
Build a whole program with Ext JS from scratch to the construction build
Excellent information and tips to make your net functions stand out
Written in a fascinating and easy-to-follow conversational kind, with useful examples overlaying the server aspect in addition to MySQL
Who This publication Is For
This ebook can help you to make use of Ext JS to its complete strength and should enable you to create a whole Ext JS software from scratch.
You'll start by way of studying easy methods to create the project's constitution, splash reveal, login display, dynamic menus, open displays dynamically and master-detail grids, and lots more and plenty extra. additionally, you will methods to export info to Excel together with PDFs and photographs, whereas constantly conserving top practices in mind.
Following this, you'll detect easy methods to use the MVC structure, the hot MVVM. subsequent, you'll easy methods to customise subject matters and the way to arrange the appliance to be prepared for deployment upon completion.
By the tip of the e-book, you have realized every little thing you must understand to actually grasp Ext JS and begin development complex functions.
In today’s IT surroundings, harried process directors are discovering themselves extra overworked than ever. This ebook is helping them regain the various misplaced time spent growing and checking out shell scripts, and publications readers via greater than one hundred fifty much-needed and useful real-world examples. simply because all scripts present in this booklet are POSIX (Portable working process Interface)-compliant, they're supported by means of all significant shell versions, together with Bash, Zsh and sh, between others.
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So how about passing a variable that has reference to a function? log("I'm a function") } tellType(dataFn) => function That’s great! Now we will make our tellType to execute the passed argument as shown in Listing 3-3 if it’s of type function: Listing 3-3. log("The passed data is " + arg) } 31 Chapter 3 ■ Higher-Order Functions Here we are checking whether the passed arg is of type function; if so, call it. Remember if a variable is of type function, it means it has a reference to a function that can be executed.
But let’s abstract these away into a function called every. The every function takes two arguments: an array and a function. It checks if all the elements of the array are evaluated to true by the passed function. The implementation looks like this as shown in Listing 3-8: Listing 3-8. length;i++) result = result && fn(arr[i]) return result } 37 Chapter 3 ■ Higher-Order Functions Here we are simply iterating over the passed array and calling the fn by passing the current content of the array element at the iteration.
This is mainly due to the point number 1. A closure function can access all the variables declared in its own declaration (see point 1). No rocket science here! 46 Chapter 4 ■ Closures and Higher-Order Functions ■■Note A strong take away from the above code snippet is that, inner function won't be visible outside outer function! Go ahead and test it. log(global) } inner() //call the inner function. } now when inner function executed, it does print the value global. Thus closures can access the global variable (see point 2).