suggest me the different options to store this data in javascript

I am getting the data in the following format

[Sl.No, Amount,开发者_C百科 Transaction Type, Account Number]

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[01, $10000, Deposit, 473882829]

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[02, $10202, Deposit, 348844844]

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[02, $10202, Withdrawal, 348844844]

What is the best way to store this data in Javascript for faster retrieval

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var data = ["02", "$10202", "Withdrawal", 348844844]

//empty object
var list = {};

//Constructing the index by concatenating the last two elements of the data.
//Probably this will give the primary key to the data.
var index = data[2] + data[3].toString();

//Store the data using the index
list[index] = data;

You can retrieve the data using the index constructed above.

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1. Determine how the data needs to be accessed. I am guessing it needs to be accessed linearly, so as to not accidentally overdraw (withdraw before deposit), etc -- in this case an Array is generally a suitable data structure. A simple for-loop should be able to find most simple "queries".

2. Define how the object is represented in Javascript -- is each "transaction item" an array of [x, amount, type, account] or is it an object with the signature {x: ..., amount: ..., type: ..., account: ...} (I often opt for the latter as it adds some self-documentation). It could also be an object created with new TransactionItem (or whatnot) that includes methods.

3. Determine how to convert the raw data into the chosen object representation. For a well-defined format a simple regular expression or 'split' may work.

4. Use data. Remember that even a shoddy O(n^2) algorithm is generally "fast enough" for small n. Best to get it working first.

Happy coding.