Doubts (with JS) - Solved

[krakxn]

Context: Taken from Patrick - NFT Marketplace Back-end - Script: moveBlocks

Doubt: Isn't zero a falsy value in JS? How does the if-statement run in the code below - if the variable (sleepAmount) is declared as zero? (also, read the edit in the discussion below - that might have satisfied the issue, just need a confirmation by someone else now)

Code:

async function moveBlocks(amount, sleepAmount = 0) {
    console.log("Moving blocks...")
    for (let index = 0; index < amount; index++) {
        await network.provider.request({
            method: "evm_mine",
            params: [],
        })
        if (sleepAmount) {
            console.log(`Sleeping for ${sleepAmount}`)
            await sleep(sleepAmount)
        }
    }
    console.log(`Moved ${amount} blocks`)
}

Note: sleepAmount is not modified anywhere and its scope is only here

[krakxn]

Doing moveBlocks(<amount>, sleepAmount = <insert a number>) overrides the sleepAmount = 0 in the method signature - hence satisfying the if-statement.