Angular从0到1：function（下）

时间：2021-12-12 01:30:59

1、前言

2、function（下）

2.13、angular.isArray(★★)

angular.isArray用于判断对象是不是数组，等价于Array.isArray

console.log(angular.isArray([])); // true

console.log(angular.isArray({0: '1', 1: '2', length: 2})); // false

2.14、angular.isDate(★★)

通过判断toString.call(value)是不是等于'[object Date]' 来判断对象是个是一个Date对象.

console.log(angular.isDate(new Date())); // true

console.log(angular.isDate(223)); // false

2.15、angular.isDefined(★★)

判断对象或者属性是否定义

var obj = {a: 1, b: null, c: undefined};

console.log(angular.isDefined(obj.a)); // true

console.log(angular.isDefined(obj.b)); // true

console.log(angular.isDefined(obj.c)); // false

console.log(angular.isDefined(obj.d)); // false

2.16、angular.isElement(★★)

此方法判断元素是不是一个元素（包含dom元素，或者jquery元素）

console.log(angular.isElement(document.getElementsByTagName('body')[0])); // true

console.log(angular.isElement($('body'))); // true

2.17、angular.isFunction(★★)

此方法判断对象是不是一个function ，等价于 typeof fn === 'function'

console.log(angular.isFunction(new Function('a', 'return a'))); // true

console.log(angular.isFunction(function(){})); // true

console.log(angular.isFunction({})); // false

2.18、angular.isNumber(★★)

判断数字是否为number

function isNumber(value) {

  return typeof value === 'number';

}

2.19、angular.isObject(★★)

function isObject(value) {

  return value !== null && typeof value === 'object';

}

2.20、angular.isString(★★)

function isString(value) {

    return typeof value === 'string';

}

2.21、angular.isUndefined(★★)

function isUndefined(value) {

    return typeof value === 'undefined';

}

2.22、angular.lowercase(★★)

转换字符串为小写模式，如果参数不是字符串，那么原样返回

var lowercase = function(string) {

  return isString(string) ? string.toLowerCase() : string;

};

console.log(angular.lowercase(1)); // 1

console.log(angular.lowercase('ABCdef')); // 'abcdef'

2.23、angular.uppercase(★★)

转换字符串为大写模式，如果参数不是字符串，那么原样返回

var uppercase = function(string) {

  return isString(string) ? string.toUpperCase() : string;

};

console.log(angular.uppercase(1)); // 1

console.log(angular.uppercase('ABCdef')); // 'ABCDEF'

2.24、angular.merge(★★)

将多个对象进行深度复制，与extend()不同，merge将会递归进行深度拷贝。该拷贝是完全深拷贝，就连对象引用也不一样。

var o = {};

var obj1 = {a1: 1, a2: 2, a3: [1]};

var obj2 = {b1: [2], b2: /abc/};

var obj3 = [o];

var obj4 = {d: o};

var result = angular.merge({}, obj1, obj2, obj3);

console.log(result);

console.log(result[0] === o); // false

console.log(result.d === o); // false

2.25、angular.noop(★★)

一个空函数，调试时非常有用。可以避免callback未定义引发的error。

function foo(callback) {

  var result = calculateResult();

  (callback || angular.noop)(result);

}

2.26、angular.reloadWithDebugInfo(★★)

启用DebugInfo，该设置优先级高于$compileProvider.debugInfoEnabled(false)

*:first-child {
margin-top: 0 !important;
}

body>*:last-child {
margin-bottom: 0 !important;
}

/* BLOCKS
=============================================================================*/

p, blockquote, ul, ol, dl, table, pre {
margin: 15px 0;
}

/* HEADERS
=============================================================================*/

h1, h2, h3, h4, h5, h6 {
margin: 20px 0 10px;
padding: 0;
font-weight: bold;
-webkit-font-smoothing: antialiased;
}

h1 tt, h1 code, h2 tt, h2 code, h3 tt, h3 code, h4 tt, h4 code, h5 tt, h5 code, h6 tt, h6 code {
font-size: inherit;
}

h1 {
font-size: 28px;
color: #000;
}

h2 {
font-size: 24px;
border-bottom: 1px solid #ccc;
color: #000;
}

h3 {
font-size: 18px;
}

h4 {
font-size: 16px;
}

h5 {
font-size: 14px;
}

h6 {
color: #777;
font-size: 14px;
}

body>h2:first-child, body>h1:first-child, body>h1:first-child+h2, body>h3:first-child, body>h4:first-child, body>h5:first-child, body>h6:first-child {
margin-top: 0;
padding-top: 0;
}

a:first-child h1, a:first-child h2, a:first-child h3, a:first-child h4, a:first-child h5, a:first-child h6 {
margin-top: 0;
padding-top: 0;
}

h1+p, h2+p, h3+p, h4+p, h5+p, h6+p {
margin-top: 10px;
}

/* LINKS
=============================================================================*/

a {
color: #4183C4;
text-decoration: none;
}

a:hover {
text-decoration: underline;
}

/* LISTS
=============================================================================*/

ul, ol {
padding-left: 30px;
}

ul li > :first-child,
ol li > :first-child,
ul li ul:first-of-type,
ol li ol:first-of-type,
ul li ol:first-of-type,
ol li ul:first-of-type {
margin-top: 0px;
}

ul ul, ul ol, ol ol, ol ul {
margin-bottom: 0;
}

dl {
padding: 0;
}

dl dt {
font-size: 14px;
font-weight: bold;
font-style: italic;
padding: 0;
margin: 15px 0 5px;
}

dl dt:first-child {
padding: 0;
}

dl dt>:first-child {
margin-top: 0px;
}

dl dt>:last-child {
margin-bottom: 0px;
}

dl dd {
margin: 0 0 15px;
padding: 0 15px;
}

dl dd>:first-child {
margin-top: 0px;
}

dl dd>:last-child {
margin-bottom: 0px;
}

/* CODE
=============================================================================*/

pre, code, tt {
font-size: 12px;
font-family: Consolas, "Liberation Mono", Courier, monospace;
}

code, tt {
margin: 0 0px;
padding: 0px 0px;
white-space: nowrap;
border: 1px solid #eaeaea;
background-color: #f8f8f8;
border-radius: 3px;
}

pre>code {
margin: 0;
padding: 0;
white-space: pre;
border: none;
background: transparent;
}

pre {
background-color: #f8f8f8;
border: 1px solid #ccc;
font-size: 13px;
line-height: 19px;
overflow: auto;
padding: 6px 10px;
border-radius: 3px;
}

pre code, pre tt {
background-color: transparent;
border: none;
}

kbd {
-moz-border-bottom-colors: none;
-moz-border-left-colors: none;
-moz-border-right-colors: none;
-moz-border-top-colors: none;
background-color: #DDDDDD;
background-image: linear-gradient(#F1F1F1, #DDDDDD);
background-repeat: repeat-x;
border-color: #DDDDDD #CCCCCC #CCCCCC #DDDDDD;
border-image: none;
border-radius: 2px 2px 2px 2px;
border-style: solid;
border-width: 1px;
font-family: "Helvetica Neue",Helvetica,Arial,sans-serif;
line-height: 10px;
padding: 1px 4px;
}

/* QUOTES
=============================================================================*/

blockquote {
border-left: 4px solid #DDD;
padding: 0 15px;
color: #777;
}

blockquote>:first-child {
margin-top: 0px;
}

blockquote>:last-child {
margin-bottom: 0px;
}

/* HORIZONTAL RULES
=============================================================================*/

hr {
clear: both;
margin: 15px 0;
height: 0px;
overflow: hidden;
border: none;
background: transparent;
border-bottom: 4px solid #ddd;
padding: 0;
}

/* IMAGES
=============================================================================*/

img {
max-width: 100%
}
-->

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