function isEmpty(value) { if (value === null || value === undefined) { return true; } if (typeof value === 'string' && value.trim().length === 0) { return true; } if (Array.isArray(value) && value.length === 0) { return true; } if (typeof value === 'object' &&...
// 对象isEmptyStr({})// falseisEmptyStrV2({})// true// 布尔isEmptyStr(false)// falseisEmptyStrV2(false)// true// 数值isEmptyStr(1)// falseisEmptyStrV2(1)// true 出现这种情况的原因是入参可能并不是字符串,所以上面函数isEmptyStrV2()的结果是错误的,isEmptyStr()的结果是对的,但是使...
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goodEmptyCheck(new String()); // false ✅ goodEmptyCheck(new Number()); // false ✅ goodEmptyCheck(new Boolean()); // false ✅ goodEmptyCheck(new Array()); // false ✅ goodEmptyCheck(new RegExp()); // false ✅ goodEmptyCheck(new Function()); // false ✅ goodEmptyChe...
console.log(stringIterator.next());//{value:'a',done:false}console.log(stringIterator.next());//{value:'b',done:false}console.log(stringIterator.next());//{value:'c',done:false}console.log(stringIterator.next());//{value:undefined,done:true} ...
It defaults to no referrer (which reflects as the empty string). contentType affects the value read from document.contentType, as well as how the document is parsed: as HTML or as XML. Values that are not a HTML MIME type or an XML MIME type will throw. It defaults to "text/html"...
C: 0, '', new Boolean(false), undefined D: 所有都是假值 答案: AJavaScript中只有6个假值: undefined null NaN 0 '' (empty string) false 函数构造函数,如new Number和new Boolean都是真值。36. 【typeof】下面代码的输出是什么? console.log(typeof typeof 1); ...
updateForm(formId,bindingData); }catch(FormException e) { e.printStackTrace(); } break; } default: { Map<String, Object> result =newHashMap<String, Object>(); reply.writeString(ZSONObject.toZSONString(result)); returnfalse; } } returntrue; } }...
默认为false draggingCursor String 拖拽标注时的鼠标指针样式。此属性值需遵循CSS的cursor属性规范 rotation Number 旋转角度 shadow Icon 阴影图标 title String 鼠标移到marker上的显示内容 Animation 此常量表示标注的动画效果。 常量 描述 BMAP_ANIMATION_DROP 坠落动画 BMAP_ANIMATION_BOUNCE 跳动动画 Icon 此类...
Pass an empty string "" to enable, or a non-empty string to set the debug suffix. domprops (default: false)— Use true to allow the mangling of properties commonly found in Document Object Model. Not recommended to override this setting. globals (default: false)— Use true to mangle ...