I have created an object array in JavaScript. How can I print the object array in the browser window, similar to print_r
function in PHP?
var lineChartData = [{
date: new Date(2009, 10, 2),
value: 5
}, {
date: new Date(2009, 10, 25),
value: 30
}, {
date: new Date(2009, 10, 26),
value: 72,
customBullet: "images/redstar.png"
}];
This question is related to
javascript
arrays
object
Not sure about the subelements, but all browsers should support this now:
for (val of lineChartData) {
document.write(val);
}
This might give you some ideas For-each over an array in JavaScript?
I use the below function to display a readout in firefox console log:
//// make printable string for console readout, recursively
var make_printable_object = function(ar_use)
{
//// internal arguments
var in_tab = arguments[1];
var st_return = arguments[2];
//// default vales when applicable
if (!in_tab) in_tab = 0;
if (!st_return) st_return = "";
//// add depth
var st_tab = "";
for (var i=0; i < in_tab; i++) st_tab = st_tab+"-~-~-";
//// traverse given depth and build string
for (var key in ar_use)
{
//// gather return type
var st_returnType = typeof ar_use[key];
//// get current depth display
var st_returnPrime = st_tab+ "["+key+"] ->"+ar_use[key]+"< is {"+st_returnType+"}";
//// remove linefeeds to avoid printout confusion
st_returnPrime = st_returnPrime.replace(/(\r\n|\n|\r)/gm,"");
//// add line feed
st_return = st_return+st_returnPrime+"\n";
//// stop at a depth of 15
if (in_tab>15) return st_return;
//// if current value is an object call this function
if ( (typeof ar_use[key] == "object") & (ar_use[key] != "null") & (ar_use[key] != null) ) st_return = make_printable_object(ar_use[key], in_tab+1, st_return);
}
//// return complete output
return st_return;
};
Example:
console.log( make_printable_object( some_object ) );
Alternatively, you can just replace:
st_return = st_return+st_returnPrime+"\n";
with
st_return = st_return+st_returnPrime+"<br/>";
to print out in a html page.
Did you check
console.table(yourArray);
More infos here: https://developer.mozilla.org/en-US/docs/Web/API/Console/table
document.getElementById('container').innerHTML = lineChartData[array_index]
If you are using Chrome, you could also use
console.log( yourArray );
Emm... Why not to use something like this?
function displayArrayObjects(arrayObjects) {_x000D_
var len = arrayObjects.length, text = "";_x000D_
_x000D_
for (var i = 0; i < len; i++) {_x000D_
var myObject = arrayObjects[i];_x000D_
_x000D_
for (var x in myObject) {_x000D_
text += ( x + ": " + myObject[x] + " ");_x000D_
}_x000D_
text += "<br/>";_x000D_
}_x000D_
_x000D_
document.getElementById("message").innerHTML = text;_x000D_
}_x000D_
_x000D_
_x000D_
var lineChartData = [{_x000D_
date: new Date(2009, 10, 2),_x000D_
value: 5_x000D_
}, {_x000D_
date: new Date(2009, 10, 25),_x000D_
value: 30_x000D_
}, {_x000D_
date: new Date(2009, 10, 26),_x000D_
value: 72,_x000D_
customBullet: "images/redstar.png"_x000D_
}];_x000D_
_x000D_
displayArrayObjects(lineChartData);
_x000D_
<h4 id="message"></h4>
_x000D_
result:
date: Mon Nov 02 2009 00:00:00 GMT+0200 (FLE Standard Time) value: 5
date: Wed Nov 25 2009 00:00:00 GMT+0200 (FLE Standard Time) value: 30
date: Thu Nov 26 2009 00:00:00 GMT+0200 (FLE Standard Time) value: 72 customBullet: images/redstar.png
You can just use the following syntax and the object will be fully shown in the console:
console.log('object evt: %O', object);
I use Chrome browser don't know if this is adaptable for other browsers.
Simple function to alert contents of an object or an array .
Call this function with an array or string or an object it alerts the contents.
Function
function print_r(printthis, returnoutput) {
var output = '';
if($.isArray(printthis) || typeof(printthis) == 'object') {
for(var i in printthis) {
output += i + ' : ' + print_r(printthis[i], true) + '\n';
}
}else {
output += printthis;
}
if(returnoutput && returnoutput == true) {
return output;
}else {
alert(output);
}
}
Usage
var data = [1, 2, 3, 4];
print_r(data);
you can use console.log()
to print object
console.log(my_object_array);
in case you have big object and want to print some of its values then you can use this custom function to print array in console
this.print = function (data,bpoint=0) {
var c = 0;
for(var k=0; k<data.length; k++){
c++;
console.log(c+' '+data[k]);
if(k!=0 && bpoint === k)break;
}
}
usage
print(array); // to print entire obj array
or
print(array,50); // 50 value to print only
Source: Stackoverflow.com