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js get first 3 characters of string
<![CDATA[const string = "0123456789";
console.log(string.slice(0, 2)); // "01"
console.log(string.slice(0, 8)); // "01234567"
console.log(string.slice(3, 7)); // "3456"]]>
js substring
<![CDATA[// the substring method returns a string out of another string
const str = 'Mozilla';
console.log(str.substring(1, 3));
// expected output: "oz"
console.log(str.substring(2));
// expected output: "zilla"
]]>
sub function javascript
<![CDATA[// Simple Substraction Function in Javascript
function sub(a, b) {
return a-b
}
console.log(sub(6, 2))]]>
substring javascript
<![CDATA[var str = "Hello world!";
var res = str.substring(1, 4); //ell]]>
substr() javascript
<![CDATA[const str = 'substr';
console.log(str.substr(1, 2)); // (1, 2): ub
console.log(str.substr(1)); // (1): ubstr
/* Percorrendo de trás para frente */
console.log(str.substr(-3, 2)); // (-3, 2): st
console.log(str.substr(-3)); // (-3): str
]]>
javascript substr
<![CDATA[str.substring(/* starting_idx */, /* number_of_values_to_get */)]]>
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