What is "coder"?

What's the main difference between a "contribute" and "tribute?"

"Contribution" is related to the verb "to contribute," which means to help to cause or bring about something. One's "contribution" is one's participation, involvement, or input in something. Ex: I contributed greatly to this group project. Ex: The Beatles' contributions to music are widely known. Meanwhile, a "tribute" is an act, gift, payment, or statement that is made to show respect, gratitude, or admiration. Ex: I made a video as a tribute to our company's 10th anniversary. Ex: The island paid tribute to its colonizers for centuries before it finally became independent.

Can I use "long to" instead of "long for"?

Yes, you can use "long to" if an infinitive verb is following in the sentence. Ex: I long to go to London."

What's the subject for "can be"? Is it "I"? Is it okay to understand this sentence has two clauses (I deal, I can be) with one subject "I"?

"Life" is the subject for "can be". You can think of this sentence as, "Life can be stressful, so this is how I deal with it."

I don't understand the grammatical point of "I'd let you had I known it" part. Could you explain more? (What is the full form of "I'd", which tense it is using, should I split this sentence like "I'd let you had, I know it", etc..)

Good question. "I'd let you" here is a short form of "I would (have) let you". The "have" past tense form is implied by the use of "had known". The singer is saying that had she known the desire of the person she is talking/singing to before, she would have allowed " it" to happen. This all makes sense in conjunction with the proceeding line "why don't you say so", meaning tell me what you want to or tell me what you desire. This sentence structure is a little bit awkward because it is being used in a song and generally song structures are amended it manipulated to be more poetic or rhythmic than regular conversation.

What does "brb" stand for? Do you use this word often when you're texting?

The term "brb" in text lingo stands for "be right back". It is used frequently in texting, especially among teenagers. Ex: Brb, I am going to work. Ex: Brb, text you soon.