Underscore.js _.compose() Function
Last Updated :
25 Nov, 2021
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The _.compose() function is used to return the composition of the list of functions. The list of the function returns the value of the function that follows.
Syntax:
html
Output:
Example 2:
html
Output:
_.compose(*functions)Parameters: This function accept a single parameter as mentioned above and described below:
- functions: It contains the list of function that to be executed.
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript" src=
"https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js">
</script>
</head>
<body>
<script type="text/javascript">
var fun1 = function (addString) {
return "Welcome to " + addString;
};
var fun2 = function (GFG) {
return GFG;
};
var str = _.compose(fun1, fun2);
console.log(str('GeeksforGeeks'));
</script>
</body>
</html>
<html><head> <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js"> </script></head><body> <script type="text/javascript"> var fun1 = function (addString) { return "Welcome to " + addString; }; var fun2 = function (GFG) { return GFG; }; var str = _.compose(fun1, fun2); console.log(str('GeeksforGeeks')); </script></body></html>
Example 2:
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript" src=
"https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js">
</script>
</head>
<body>
<script type="text/javascript">
var fun1 = function (str1) {
return 'Welcome' + str1 +
'\nA computer science portal';
};
var fun2 = function (str2) {
return ' to ' + str2.toLowerCase();
};
var str = _.compose(fun1, fun2);
console.log(str('GEEKSFORGEEKS'));
</script>
</body>
</html>
<html><head> <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js"> </script></head><body> <script type="text/javascript"> var fun1 = function (str1) { return 'Welcome' + str1 + '\nA computer science portal'; }; var fun2 = function (str2) { return ' to ' + str2.toLowerCase(); }; var str = _.compose(fun1, fun2); console.log(str('GEEKSFORGEEKS')); </script></body></html>
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