[英]JSHint considers a for-in variable 'bad'. What does this mean?
The following code: 以下代码:
var things = {'foo':'bar'}
for ( thing in things ) {
console.log(thing)
}
Consistently produces the following error in jshint: 在jshint中始终产生以下错误:
Bad for in variable 'thing'.
I do not understand what makes the 'thing' variable 'bad' - as you can see, it is not being used anywhere else. 我不明白是什么让“东西”变量“变坏” - 正如你所看到的,它并没有被其他任何地方使用。 What should I do differently to make jshint not consider this to be an error?
我应该做些什么来使jshint不认为这是一个错误?
They always are - if they are not declared. 他们总是 - 如果他们没有宣布。 Try adding
var
if thing
has not been previously declared. 尝试添加
var
如果thing
以前尚未宣布。
for ( var thing in things ) {
console.log(thing)
}
or 要么
var thing;
//more code
for ( thing in things ) {
console.log(thing)
}
Here is your code slightly modified, make sure all is declared before usage. 这是您的代码稍作修改,确保在使用前声明所有代码。
var things = {'foo':'bar'}, thing;
for ( thing in things ) {
console.log(thing)
}
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