如何使用变量内的变量进行for循环工作

Question

first of all, HEY!, I've already asked twice here and both got good answuers that helped a lot.

So... I want to my for-loop print on the console log all my variables on commands variable.

I would like to print only BOH , HALO and BOOM HSAKALAKA variables, not their texts: BOH! , HALO! , BOOM SHAKALAKA! .

var commands = {
'BOH': {text: 'BOH!'},
'HALO': {text: 'HALO!'},
'BOOM SHAKALAKA': {text: 'BOOM SHAKALAKA!'},
};

for (number = 0; number < commands.lenght; number++){
    console.log(commands[number]);
};

Answer 1

Something like this DEMO ?

var commands = {
'BOH)': {text: 'BOH!'},
'HALO': {text: 'HALO!'},
'BOOM SHAKALAKA': {text: 'BOOM SHAKALAKA!'},
};

for(key in commands){

if(commands.hasOwnProperty(key)){ //get only the properties of the current object and skip inherited properties 

    console.log("variable - " + key + " " + "value - " + commands[key].text);

}

};

In your example, you are looping through an array that doesn't exist. commands is not an array, it's an object. So, in order to loop through an object we should use its key property.

In our case key is 'BOH)' and the value of that key is commands[key] => BOH! .