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index.js
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index.js
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var _ = require('underscore');
/**
* exists
* @param {object} d datatype (array or string)
* @param {string} p param
* @return {boolean}
*/
function exists(d, p) {
if (isVaild(d) && isVaild(p)) {
return check(d, p);
} else {
console.error('ERROR: does-it-exist: Invaild dataType');
return false;
}
}
/**
* isVaild
* @param {object} d datatype (object, function, string, array)
* @return {Boolean} if vaild datatype
*/
function isVaild(d) {
var isArray = (_.isObject(d) && _.isArray(d)),
isString = _.isString(d),
isFunction = _.isFunction(d),
isObject = _.isObject(d) && (!isFunction || !isArray);
return (isArray || isObject ||
isFunction || isString);
}
/**
* check
* @param {object} d
* @param {string} p
* @return {boolean}
*/
function check(d, p) {
var isArray = _.isArray(d),
isString = _.isString(d),
isObject = _.isObject(d),
isFunction = _.isFunction(d);
if (isObject && (!isFunction && !isArray)) {
return _.has(d, p);
} else if (isArray || isString) {
return _.indexOf(d, p) !== -1;
} else {
return false;
}
}
module.exports = exists;