Is there is any way to check if the json string has the value(char or string)? Here is the example:
{
"firstName": "John",
"lastName": "Smith",
"age": 25,
"address": {
"streetAddress": "21 2nd Street",
"city": "New York",
"state": "NY",
"postalCode": 10021
}
}
I have to check if this json has "m". It must know that "m" exists in a value.
use this method, if you have json string, you can use json = $.parseJSON(jsonStr) to parse -
function checkForValue(json, value) {
for (key in json) {
if (typeof (json[key]) === "object") {
return checkForValue(json[key], value);
} else if (json[key] === value) {
return true;
}
}
return false;
}
Assuming that the JSON object is assigned to var user
if(JSON.stringify(user).indexOf('m') > -1){ }
Sorry, upon reading new comments I see you're only looking to see if the string is in a key only. I thought you were looking for an 'm' in the entire JSON (as a string)
If looking in one layer and not a substring:
const hasValue = Object.values(obj).includes("bar");
If looking in one layer for a substring, and no objects as values:
const hasChar = Object.values(obj).join("").includes("m");
If looking in multi-layer for a substring:
const list = Object.values(a);
for (let i = 0; i < list.length; i++) {
const object = list[i];
if (typeof object === "object") {
list.splice(i, 1); // Remove object from array
list = list.concat(Object.values(object)); // Add contents to array
}
}
// It is important to join by character not in the search substring
const hasValue = list.join("_").includes("m");
NOTE: If searching for a key instead, check this post
Assuming you get your object syntax corrected, you can loop through the properties in an object by using a for loop:
for(props in myObj) {
if(myObj[props] === "m") { doSomething(); }
}
Possibly something like this?
function parse_json(the_json, char_to_check_for)
{
try {
for (var key in the_json) {
var property = the_json.hasOwnProperty(key);
return parse_json(property);
}
}
catch { // not json
if (the_json.indexof(char_to_check_for) !=== -1)
{
return true;
}
return false;
}
}
if (parse_json(my_json,'m'))
{
alert("m is in my json!");
}
