1 |
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2 | /**
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3 | * Types utilities
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4 | */
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5 |
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6 | const UNDEFINED = void 0;
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7 |
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8 | /**
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9 | * Return an empty function
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10 | * @return {Function}
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11 | */
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12 | export const EMPTY_FN = function() {};
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13 |
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14 | /**
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15 | * Check passed argument is an object
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16 | * @param {Object} obj
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17 | * @return {Boolean}
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18 | */
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19 | export const isObj =
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20 | (obj) => Object.prototype.toString.call(obj) === '[object Object]';
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21 |
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22 | /**
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23 | * Check passed argument is a function
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24 | * @param {Function} obj
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25 | * @return {Boolean}
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26 | */
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27 | export const isFn =
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28 | (obj) => Object.prototype.toString.call(obj) === '[object Function]';
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29 |
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30 | /**
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31 | * Check passed argument is an array
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32 | * @param {Array} obj
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33 | * @return {Boolean}
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34 | */
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35 | export const isArray =
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36 | (obj) => Object.prototype.toString.call(obj) === '[object Array]';
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37 |
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38 | /**
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39 | * Check passed argument is a string
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40 | * @param {String} obj obj
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41 | * @returns {Boolean}
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42 | */
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43 | export const isString =
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44 | (obj) => Object.prototype.toString.call(obj) === '[object String]';
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45 |
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46 | /**
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47 | * Check passed argument is a number
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48 | * @param {Number} obj
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49 | * @returns {Boolean}
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50 | */
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51 | export const isNumber =
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52 | (obj) => Object.prototype.toString.call(obj) === '[object Number]';
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53 |
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54 | /**
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55 | * Check passed argument is a boolean
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56 | * @param {Boolean} obj
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57 | * @returns {Boolean}
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58 | */
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59 | export const isBoolean =
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60 | (obj) => Object.prototype.toString.call(obj) === '[object Boolean]';
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61 |
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62 | /**
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63 | * Check passed argument is undefined
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64 | * @param {Any} obj
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65 | * @return {Boolean}
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66 | */
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67 | export const isUndef = (obj) => obj === UNDEFINED;
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68 |
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69 | /**
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70 | * Check passed argument is null
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71 | * @param {Any} obj
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72 | * @return {Boolean}
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73 | */
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74 | export const isNull = (obj) => obj === null;
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75 |
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76 | /**
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77 | * Check passed argument is empty (undefined, null or empty string)
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78 | * @param {Any} obj
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79 | * @return {Boolean}
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80 | */
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81 | export const isEmpty = (obj) => isUndef(obj) || isNull(obj) || obj.length === 0;
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