How to use the isNullOrUndefined function from util

util.md?plain=1

GitHub: Amery2010/nodejs-api-doc-cn

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  // false
```


<div id="isNullOrUndefined" class="anchor"></div>
## util.isNullOrUndefined(object)

> 稳定度：0 - 已废弃

如果给定的 'object' 是 `null` 或 `undefined`，返回 `true`。否则，返回 `false`。

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Result.js

GitHub: guness/node-xcs

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/**
 * Builds the result and makes its properties immutable.
 */
Result.prototype.build = function () {
    if (util.isNullOrUndefined(this.mFrom) || util.isNullOrUndefined(this.mMessageId) || util.isNullOrUndefined(this.mMessageType)) {
        throw new IllegalArgumentException();
    } else if (this.mMessageType == 'nack' && (util.isNullOrUndefined(this.mError) || util.isNullOrUndefined(this.mErrorDescription))) {
        throw new IllegalArgumentException();
    } else {

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+ 3 other calls in file