10 examples of 'check if value exists in object javascript' in JavaScript

81
function valueExists(value: any) {
82
    return value != null;
83
}

37
function hasKey(dict, javaScriptString) {
38
  if (javaScriptString === '__proto__') {
39
    return (typeof dict.proto !== 'undefined');
40
  } else {
41
    return (typeof dict.normalKeys[javaScriptString] !== 'undefined');
42
  }
43
}

19
function objectKeyExist(object)
20
{
21
    return _.some(object, function (o) {
22
        return !_.isEmpty(_.pick(o, ['customer', 'cart']));
23
    })
24
}

11
function exists(val) { return val !== null && val !== undefined }

117
function existsValidatorCheckNull(value) {
118
  return value != null;
119
}

171
function _PropertyExist(name, obj) {
172
    var _propname = name.toUpperCase();
173
    for (var prop in obj) {
174
        if (obj.hasOwnProperty(prop)) {
175
            if (prop.toUpperCase() == _propname) {
176
                return true;
177
            }
178
        }
179
    }
180
    return false;
181
}

203
private static checkValue(value: any): void {
204
  if (value === undefined) {
205
    throw new Error("Value is undefined");
206
  }
207
}

177
function isValueInArrayOfObjects(selected, key, value) {
178
    if (!Array.isArray(selected)) {
179
        return selected[key] === value;
180
    }
181
    for (var _i = 0, selected_1 = selected; _i < selected_1.length; _i++) {
182
        var s = selected_1[_i];
183
        if (s && s[key] && s[key] === value) {
184
            return true;
185
        }
186
    }
187
    return false;
188
}

1208
function isMatch( obj, key, value ) {
1209
  return obj[ key ] && obj[ key ] === value;
1210
}

4
function exists(obj, prop) {
5
  return !_.isUndefined(obj[prop]);
6
}