“使用数组文字符号[]” for var os_map = {} [英] "Use the array literal notation []" for var os_map = {}
问题描述
我不明白为什么当我使用JavaScript文件运行JSLint时收到错误消息。
I don't understand why I get the error message when I run JSLint with a JavaScript file.
我收到消息var os_map = {};第28行的问题36:使用数组文字符号[]。
如果我运行 JSLint 中的此代码。 JSLint的选项如下所示。
I get the message var os_map = {}; Problem at line 28 character 36: Use the array literal notation [].
if I run this code in JSLint. The options for the JSLint as the following.
/*jslint onevar: true, browser: true, undef: true, nomen: true, eqeqeq: true, plusplus: true, bitwise: true, regexp: true, strict: true, newcap: true, immed: true */
声明对象(, {}
)应该没问题,但JSLint建议使用空数组( []
)
Claiming object (, which is {}
) should be okay, but JSLint suggets to use an empty array (, which is []
)
:我找到了答案。我错了。 var os_map = {}
没有任何问题。代码显示在错误消息中,因为我没有使用require strict;
。我收到错误消息错误。感谢您回答我的问题。
: I found an answer. I was wrong. There's nothing wrong with var os_map = {}
. The code was shown in an error message because I did not use "require strict";
. I got the error message wrong. Thanks for answering my questions.
推荐答案
违规行:
var os_autoload_inputs = new Array('searchInput', 'searchInput2',
'powerSearchText', 'searchText');
JSLint 不期望看到 new Array
构造函数,你应该使用[]代替:
JSLint does not expect to see new Array
constructor, you should use [] instead:
var os_autoload_inputs = ['searchInput', 'searchInput2',
'powerSearchText', 'searchText'];
为什么? :
1,Crockford不喜欢 new
。
1, Crockford doesn't like new
.
2,可以覆盖数组
对象:
Array = {};
new Array(); // TypeError: Array is not a constructor
3,使用不一致,例如:
3, Usage inconsistencies, e.g.:
var a = new Array(5); // empty 5 elements array
var b = [5]; // 1 element array containing the 5 number on index 0
参见:
- What’s the difference between "Array()" and "[]" while declaring a JavaScript array?
- What’s wrong with var x = new Array();
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