Suppose I have a scenario where I need to validate if the words in an array exist in a dictionary and take certain actions accordingly. Here's a snippet of the code that achieves this:
let dictionary = {
aaa : 'value1',
bbb : 'value2',
ccc : 'value3'
}
let wordsArr = ['dfjd', 'aaa', 'Bbb', 'dfjkd']
for (let word of wordsArr) {
if (word in dictionary) {
console.log(word, 'is in dictionary')
}
}
Now, the requirement is to modify the if statement in such a way that it ignores the case while checking for the word in the dictionary.
An approach to achieve this could be by iterating through Object.keys(dictionary) with a regular expression test on each key.
let dictionary = {
aaa : 'value1',
bbb : 'value2',
ccc : 'value3'
}
let wordsArr = ['dfjd', 'aaa', 'Bbb', 'dfjkd']
for (let word of wordsArr) {
let re = new RegExp(word, 'i');
for (key of Object.keys(dictionary)){
if (re.test(key)) {
console.log(word, 'is in dictionary')
}
}
}
However, there might be a more efficient method than looping through every key in the dictionary for every word in the array, such as leveraging the in operator or the .hasOwnProperty() method.