Function count counts the number of selected elements Count函數(shù)可以計(jì)數(shù)所選元素的個(gè)數(shù)
The str _ word _ count ( ) function counts the number of words in a string 函數(shù)的作用是:計(jì)算字符串中的詞數(shù)。
The substr _ count ( ) function counts the number of times a substring occurs in a string 函數(shù)的作用是:查找子字符串出現(xiàn)次數(shù)。
The count ( ) function counts the elements of an array , or the properties of an object 函數(shù)的作用是:計(jì)算數(shù)組中的元素?cái)?shù)目或?qū)ο笾械膶傩詡€(gè)數(shù)。
The sizeof ( ) function counts the elements of an array , or the properties of an object 函數(shù)的作用是:統(tǒng)計(jì)一個(gè)數(shù)組中所包含的元素?cái)?shù)量;或者是統(tǒng)計(jì)一個(gè)對象中所包含的屬性數(shù)量。