indexof javascript
//indexOf - JS method to get index of array element.
// Returns -1 if not found
var colors=["red","green","blue"];
var pos=colors.indexOf("blue");//2
//indexOf getting index of sub string, returns -1 if not found
var str = "We got a poop cleanup on isle 4.";
var strPos = str.indexOf("poop");//9
//Eg with material ui
<Checkbox
checked={value.indexOf(option) > -1}
value={option}
/>javascript indexof
//indexOf getting index of array element, returns -1 if not found
var colors=["red","green","blue"];
var pos=colors.indexOf("blue");//2
//indexOf getting index of sub string, returns -1 if not found
var str = "We got a poop cleanup on isle 4.";
var strPos = str.indexOf("poop");//9javascript indexof with condition
a = [
{prop1:"abc",prop2:"qwe"},
{prop1:"bnmb",prop2:"yutu"},
{prop1:"zxvz",prop2:"qwrq"}
];
index = a.findIndex(x => x.prop2 ==="yutu");
console.log(index);js indexof string
const paragraph = 'The quick brown fox';
console.log(paragraph.indexOf('T'));
>> 0
console.log(paragraph.indexOf('h'));
>> 1
console.log(paragraph.indexOf('Th'));
>> 0
console.log(paragraph.indexOf('he'));
>> 1
console.log(paragraph.indexOf('x'));
>> 18make indexOF in js
function indexOf(arr, value) {
for (let [i, e] of arr.entries()) {
if (value == e) return i;
}
return -1;
}
indexOf([1,2,3], 2); //returns 1indexOf()
for (let i in myObj.cars) {
x
+= myObj.cars[i];
}Copyright © 2021 Codeinu
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