I would like to represent you some useful Javascript helper functions for manipulating data.


forEach() calls a provided callback function once for each element in an array in ascending order.


arr.forEach(callback(currentValue[, index[, array]]) {
// execute something
}[, thisArg]);


forEach() function


flter() creates a new array with all elements that…

The javascript console functions are very useful to display data in the console. Every javascript developer need to know them. They allow you to debug Javascript code and solve problems with your code.

Time() & TimeEnd()

Starts and stops a time. That helps you to know how much time a function take to execute.


Outputs an error message to the console.


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