我们可以依靠Object.keys()这个方法通过判断它的长度来知道它是否为空。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 if(Object.keys(object).length===0){returnfalse// 如果为空,返回false}returntrue// 如果不为空,则会执行到这一步,返回true 作者:言墨儿 链接:http://www.jianshu.com/p/972d0...
js 判断对象是否为空的四种方法一.JSON.stringify() 将对象强制转成 {} 字符串进行比较 示例: var a={ };//或 a=new Object(); console.log...() 返回对象所有的属性名的数组,数组length为0,则对象是空对象。...该方法是ES5标准 ...
if(!(checkData.isEmptySpan("filterStr") && checkData.filterStrSpan('filterStr','#'))) { isPass = false; } //检查url if(!(checkData.isEmptySpan("isURL") && checkData.isURLSpan('isURL'))) isPass = false; //email if(!(checkData.isEmptySpan("isEmail") && checkData.isEmailSpan...
}isEmpty({});// trueisEmpty(newDate());// false constisObjectEmpty= (objectName) => {for(letpropinobjectName) {if(objectName.hasOwnProperty(prop)) {returnfalse; } }returntrue; }; constisObjectEmpty= (objectName) => {returnJSON.stringify(objectName) ==="{}"; }; functionisEmpty...
publicKeywordCheckUtils(){// 空构造方法}publicstaticvoidcheckInsecureKeyword(Stringcode)throwsException{Set<String>insecure=blacklist.stream().filter(s->StringUtils.containsIgnoreCase(code,s)).collect(Collectors.toSet());if(!CollectionUtils.isEmpty(insecure)){thrownewException("输入字符串不是安全的");...
if (index >= static_cast<uint32_t>(Smi::kMaxValue)) return false; if (object.IsJSArray()) { Object length = JSArray::cast(object).length(); if (!length.IsSmi()) return false; *new_capacity = static_cast<uint32_t>(Smi::ToInt(length)); } else if (object.IsJSArgumentsObject...
keys = object->GetCachedEnumKeysWithElements(); } } else { keys = object->GetEnumKeys(); } // For-In Body: for (size_t i = 0; i < keys->length(); i++) { // For-In Next: String* key = keys[i]; ...
If you have any questions during development, post them on the Issues page of GitHub.This API checks whether a bucket exists. If an HTTP status code 200 is returned, the
nameCache (default: null)— pass an empty object {} or a previously used nameCache object if you wish to cache mangled variable and property names across multiple invocations of minify(). Note: this is a read/write property. minify() will read the name cache state of this object and upd...
Delete an empty bucket.parameters:name {String} bucket name If bucket is not empty, will throw BucketNotEmptyError. If bucket is not exists, will throw NoSuchBucketError. [options] {Object} optional parameters [timeout] {Number} the operation timeout ...