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var category = "a()";
if(category.charAt(0) == /^[a-zA-Z]+$/){
/*This part doesn't gets executed*/
/*What is the problem with the if condition?*/
}
You are comparing your character with an instance of a regular expression.
You actually want to test your character with the regular expression.
You can do that like this:
var category = "a()";
if (/^[a-zA-Z]+$/.test(category.charAt(0))) {
// Now it will get executed
}
Further reading on JavaScript regex flavor:
http://www.regular-expressions.info/javascript.html
Related
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Closed 7 months ago.
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Even though two Japanese strings seem identical, why don't they give correct results when compared in JavaScript?
const str1 : string="廣瀬和廣"
const str2 : string="廣瀨和廣"
if(str1 === str2){
console.log('true')
} else {
console.log('false')
}
But result is false
false
Does anyone know why please help me
They're different strings, even if they look the similar.
encodeURIComponent("廣瀬和廣") -> '%E5%BB%A3%E7%80%AC%E5%92%8C%E5%BB%A3'
encodeURIComponent("廣瀨和廣") -> '%E5%BB%A3%E7%80%A8%E5%92%8C%E5%BB%A3'
^ ^
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In C# if I do
var value = Convert.ToInt32("1000000000000000000000000000000", 2);
It will return 1073741824 but when I do the same in javascript,
parseInt(1000000000000000000000000000000,2)
It return 1 but not 1073741824
You need to pass string as first parameter
console.log(parseInt("1000000000000000000000000000000",2))
It's because in JavaScript you're lacking the quotation marks :)
parseInt("1000000000000000000000000000000",2)
works fine.
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Closed 5 years ago.
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I know how to use an arrow function for e.g. Array.filter() method, as you only need one value: var a = array.filter(val=>{return val<=5;});
but how do you do it with more than one value like with sort? I tried this but it doesn't work:array.sort(a,b)=>{return b-a;});
You could use right parenthesis for the arguments.
array.sort((a, b) => b - a);
// ^ ^
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Closed 6 years ago.
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I need to use the following regex in my Javascript code:
/\D*(\d+)\s*([TGMkmµnp]).*/g
However, the µ symbol is causing syntax error.
How can I fix this?
The error message is:
At "value = str.replace(/(+)(TGMk"
error110: SYNTAX ERROR while lexing character "µ".
I am using TestComplete software.
My code is as simple as this:
function GetVoltageDbl(str)
{
var value = str.replace(/\D*(\d+)\s*([TGMkµmnp]).*/g, "$1");
var prefix = str.replace(/\D*(\d+)\s*([TGMkµmnp]).*/g, "$2");
Log.Message(value);
Log.Message(prefix);
}
Try replacing µ with \u03BC as follows:
/\D*(\d+)\s*([TGMkm\u03BCnp]).*/g
Please try this \µ . It's need to help
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Closed 8 years ago.
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I wanted to return following string, but I still couldn't get it done right for couple of hours. CAn anyone tell me what did I do wrong? Thank you.
<?php
return 'rs...#gmail.com.com';
?>
You have single quotes in the JavaScript code in your onclick attribute. You need to escape these by placing a backslash before each single quote.