test breaking out of loops

loops-breakout.js

/* 
	break out of loops
	---------------------
	test in node with:
	>node loops-breakout
*/
//+++++ use for -loop; +++++++++++++++
console.log('starting for -loop...');
let selectedRows = {};
//add props(or keys) to object.
selectedRows.pk1 = false;
selectedRows.pk2 = false;
selectedRows.pk3 = true; //<==
selectedRows.pk4 = false;
selectedRows.pk5 = false;

for(var prop in selectedRows) {
	console.log(prop); //logs the key name. i.e. pk1, pk2, etc...
	console.log(selectedRows[prop]); //logs the key value i.e. false, false, etc...
	if (selectedRows.hasOwnProperty(prop) && selectedRows[prop] ) { //own-prop not relevant here.. as those are the only props, but may be relevant in other cases.
		break; //exits the for-loop, does not iterate to pk4,pk5 !!
		//return; <-- you can also return, but note it returns from the whole script / module; does not continue below unless you wrap the loop in its own fn.
	}
}
console.log('End for -loop.================');
console.log();

//+++++ use .some() -loop; +++++++++++++++
console.log('starting Array.some() loop...');
let myArray = [1,2,3,4,5,6];
myArray.some( function(item) { //use some instead of forEach;
	console.log(item);
	if (item === 3)
		return true;
});
console.log('End .some() loop.================')
console.log();


//+++++ use .every() -loop; +++++++++++++++
console.log('starting Array.every() loop...');
let myArray2 = [1,2,3,4,5,6];
myArray2.every( function(item) { //forEach
	console.log(item);
	if (item > 3)
		return false; //exit on the 4th-iterations; i.e. bypass below, and stop further iterations!
	
	console.log('do stuff here...', item);
	return true; //put this last to keep the iteration going; if you dont return anything, loop will stop after one iteration!	
});
console.log('End .every() loop.================')