diff --git "a/38\345\274\240\345\205\210\346\235\260/\344\275\234\344\270\232/2020-10-20\347\254\254\344\272\224\346\254\241\344\275\234\344\270\232.html" "b/38\345\274\240\345\205\210\346\235\260/\344\275\234\344\270\232/2020-10-20\347\254\254\344\272\224\346\254\241\344\275\234\344\270\232.html" new file mode 100644 index 0000000000000000000000000000000000000000..171d451646c5737935fb327a2b536f10e8f1f60c --- /dev/null +++ "b/38\345\274\240\345\205\210\346\235\260/\344\275\234\344\270\232/2020-10-20\347\254\254\344\272\224\346\254\241\344\275\234\344\270\232.html" @@ -0,0 +1,58 @@ + + + + + + + Document + + + + + + \ No newline at end of file diff --git "a/38\345\274\240\345\205\210\346\235\260/\347\254\224\350\256\260/2022-10-20\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232.md" "b/38\345\274\240\345\205\210\346\235\260/\347\254\224\350\256\260/2022-10-20\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232.md" new file mode 100644 index 0000000000000000000000000000000000000000..05d54f59f31e68f4b841895bf90ff4d4e4bdd505 --- /dev/null +++ "b/38\345\274\240\345\205\210\346\235\260/\347\254\224\350\256\260/2022-10-20\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232.md" @@ -0,0 +1,83 @@ +| 数组: | | | +| ----- | ------------------------------------------------------------ | ------------------------------------------------------------ | +| | [2](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_2) | concat:连接,数组合并 | +| | [3](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_3) | 例子: | +| | [4](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_4) | const arr = [1,2,3] | +| | [5](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_5) | const arr1 = [4,5,6] | +| | [6](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_6) | console.log(arr1); | +| | [7](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_7) | join:将数组转成字符串] | +| | [8](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_8) | forEach(遍历数组) | +| | [9](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_9) | 例子: | +| | [10](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_10) | arr.forEach( | +| | [11](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_11) | | +| | [12](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_12) | function (element){ | +| | [13](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_13) | console.log(element); | +| | [14](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_14) | } | +| | [15](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_15) | ) | +| | [16](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_16) | 映射方法map() | +| | [17](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_17) | 例: | +| | [18](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_18) | const arr=[1, 2, 3, 4, 5, 6] | +| | [19](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_19) | const arr1 = arr.map( | +| | [20](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_20) | function (element) { | +| | [21](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_21) | return element + 1 | +| | [22](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_22) | } | +| | [23](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_23) | ) | +| | [24](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_24) | | +| | [25](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_25) | 将数组的单词全转为大写 | +| | [26](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_26) | 例: | +| | [27](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_27) | const countries = ['Finland', 'Sweden', 'Norway', 'Denmark', 'Iceland'] | +| | [28](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_28) | const new_countries = countries.map( | +| | [29](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_29) | function (e){ | +| | [30](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_30) | return e.toUpperCase() | +| | [31](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_31) | } | +| | [32](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_32) | ) | +| | [33](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_33) | filter过滤:返回数组中符合条件的数据 | +| | [34](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_34) | 例: | +| | [35](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_35) | const new_arr = arr.filter( | +| | [36](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_36) | function (e){ | +| | [37](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_37) | return e%2==0 //true：返回 false：不符合条件=>过滤 | +| | [38](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_38) | } | +| | [39](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_39) | ) | +| | [40](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_40) | | +| | [41](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_41) | reduce(),reduceRight():归纳汇总： 返回一个总数据 | +| | [42](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_42) | 例: | +| | [43](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_43) | const arr = [1, 2, 3, 4, 5, 6] | +| | [44](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_44) | var sum = arr.reduceRight( | +| | [45](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_45) | function (v1,v2){ | +| | [46](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_46) | return v1*v2 | +| | [47](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_47) | } | +| | [48](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_48) | ) | +| | [49](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_49) | | +| | [50](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_50) | every():只要有一个false，返回 | +| | [51](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_51) | 例: | +| | [52](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_52) | some() | +| | [53](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_53) | var isMatch = arr.every( | +| | [54](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_54) | function (e){ | +| | [55](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_55) | return e>1 | +| | [56](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_56) | } | +| | [57](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_57) | ) | +| | [58](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_58) | | +| | [59](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_59) | var isMatch = arr.some( | +| | [60](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_60) | function (e){ | +| | [61](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_61) | return e==6 | +| | [62](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_62) | } | +| | [63](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_63) | ) | +| | [64](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_64) | | +| | [65](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_65) | 二维数组 | +| | [66](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_66) | const arrayOfArray = [[1, 2, 3], [4, 5, 6]] | +| | [67](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_67) | 增删改查 | +| | [68](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_68) | console.log(arrayOfArray[1][1]); | +| | [69](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_69) | | +| | [70](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_70) | 删 | +| | [71](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_71) | arrayOfArray[1].splice(1,1) | +| | [72](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_72) | console.log(arrayOfArray); | +| | [73](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_73) | 函数 | +| | [74](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_74) | 带参(形参) | +| | [75](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_75) | undefined:变量声明了但没有赋值 | +| | [76](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_76) | null:变量声明，并且有个空引用 | +| | [77](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_77) | ...args:剩余运算符,将剩下的参数都放进args数组中 | +| | [78](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_78) | function fn(A,B,...args){ | +| | [79](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_79) | rguments:伪数组 | +| | [80](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_80) | for (let index = 0; index < arguments.length; index++) { | +| | [81](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_81) | console.log(arguments[index]); | +| | [82](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#7dfbb5f92d49bd56a2732ccddaa804aca324b6f7_0_82) | } | \ No newline at end of file diff --git "a/38\345\274\240\345\205\210\346\235\260/\347\254\224\350\256\260/2022-1020\347\254\254\344\272\224\346\254\241\344\275\234\344\270\232.md" "b/38\345\274\240\345\205\210\346\235\260/\347\254\224\350\256\260/2022-1020\347\254\254\344\272\224\346\254\241\344\275\234\344\270\232.md" new file mode 100644 index 0000000000000000000000000000000000000000..9b340382db1a1a4e371a858532cf528b37aab789 --- /dev/null +++ "b/38\345\274\240\345\205\210\346\235\260/\347\254\224\350\256\260/2022-1020\347\254\254\344\272\224\346\254\241\344\275\234\344\270\232.md" @@ -0,0 +1,60 @@ +| 函数: | | | +| ----- | ------------------------------------------------------------ | ------------------------------------------------------------ | +| | [2](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_2) | 匿名函数： function (){} | +| | [3](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_3) | 箭头函数:var aa = (形参列表) => {函数体} arrow function | +| | [4](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_4) | | +| | [5](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_5) | 无返回值,一般不用箭头函数 | +| | [6](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_6) | 如果箭头函数返回一个对象,那么需要在对象外面加上括号 | +| | [7](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_7) | 例: | +| | [8](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_8) | var aa = function (n1, n2) { | +| | [9](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_9) | var sum = n1 + n2 | +| | [10](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_10) | return sum; | +| | [11](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_11) | } | +| | [12](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_12) | 箭头: | +| | [13](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_13) | var bb = (n1, n2) => { | +| | [14](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_14) | var sum = n1 + n2; | +| | [15](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_15) | return n1+n2; | +| | [16](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_16) | } | +| | [17](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_17) | var cc = (n1, n2) => n1 + n2; //函数只有一个return语句时，省略{}和return关键字,直接写返回值 | +| | [18](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_18) | 当函数只有一个形参时，可以省略圆括号 | +| | [19](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_19) | var dd = (num) => { | +| | [20](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_20) | var res = 1; | +| | [21](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_21) | for (var i = 1; i <= num; i++) { | +| | [22](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_22) | res *= i; | +| | [23](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_23) | } | +| | [24](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_24) | return console.log(res);; | +| | [25](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_25) | } | +| | [26](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_26) | | +| | [27](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_27) | var ee = () => '这是一个箭头函数'; //无参时，圆括号不可以省略 | +| | [28](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_28) | 对象: | +| | [29](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_29) | 对象： 类(人类，鱼类，鸟类) 万物对象:属性和行为 | +| | [30](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_30) | 字面量表达式创建对象 | +| | [31](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_31) | var obj = { | +| | [32](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_32) | name:{ | +| | [33](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_33) | firstName:'李', | +| | [34](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_34) | lastName:'华' | +| | [35](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_35) | }, | +| | [36](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_36) | age:18, | +| | [37](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_37) | 'qq number': 4619163491 | +| | [38](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_38) | } | +| | [39](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_39) | 属性:增删改查 | +| | [40](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_40) | | +| | [41](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_41) | 1.查 . 一级属性 二级属性往后[][] | +| | [42](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_42) | 1.1查 使用 [] | +| | [43](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_43) | console.log(obj['name']['lastName']); | +| | [44](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_44) | 增 obj.原来obj中没有的属性，相当于将该属性添加到对象obj中 | +| | [45](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_45) | obj.gender = '男' | +| | [46](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_46) | console.log(obj); | +| | [47](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_47) | | +| | [48](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_48) | 删 delete 一般删之前要对该属性进行判断 | +| | [49](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_49) | delete obj.age | +| | [50](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_50) | console.log(obj); | +| | [51](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_51) | | +| | [52](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_52) | 构造函数 = new 对象 | +| | [53](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_53) | | +| | [54](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_54) | 普通函数命名规则：小驼峰:getName() | +| | [55](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_55) | 构造函数命名规则：大驼峰:GetName() | +| | [56](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_56) | var obj = new GetName() //生成了一个对象 | +| | [57](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_57) | console.log(obj.age); | +| | [58](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_58) | | +| | [59](https://gitee.com/level-21-software-class-4/java-script/pulls/88/files#8559adefe7ff9afc844e60da73fdc07df9863d3c_0_59) | | \ No newline at end of file