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Contents
/** Used as the `TypeError` message for "Functions" methods. */
var FUNC_ERROR_TEXT = 'Expected a function';
/**
* Creates a function that invokes `func`, with the `this` binding and arguments
* of the created function, while it's called less than `n` times. Subsequent
* calls to the created function return the result of the last `func` invocation.
*
* @static
* @memberOf _
* @category Function
* @param {number} n The number of calls at which `func` is no longer invoked.
* @param {Function} func The function to restrict.
* @returns {Function} Returns the new restricted function.
* @example
*
* jQuery('#add').on('click', _.before(5, addContactToList));
* // => allows adding up to 4 contacts to the list
*/
function before(n, func) {
var result;
if (typeof func != 'function') {
if (typeof n == 'function') {
var temp = n;
n = func;
func = temp;
} else {
throw new TypeError(FUNC_ERROR_TEXT);
}
}
return function() {
if (--n > 0) {
result = func.apply(this, arguments);
}
if (n <= 1) {
func = undefined;
}
return result;
};
}
module.exports = before;
Version data entries
153 entries across 80 versions & 8 rubygems