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How can I check for an empty/undefined/null string in JavaScript?
...e !!(not not) operator.
if(!!str){
// Some code here
}
Or use type casting:
if(Boolean(str)){
// Code here
}
Both do the same function. Typecast the variable to Boolean, where str is a variable.
It returns false for null,undefined,0,000,"",false.
It returns true for string "0" and whi...
Use of “instanceof” in Java [duplicate]
... of this operator indicates design flaws. The abstraction that needs to be cast to the concrete type doesn't provide enough information. It's either just some bad abstraction or abstraction that is used in a wrong domain. You can check detailed explanation with an example here: medium.com/@aerokhin/...
What does LINQ return when the results are empty
...nto another query. This caused the second query to throw no matter what I cast it to because there was no value being fed into the second query.
– trevorc
Nov 30 '11 at 21:11
...
What is a wrapper class?
...ed to write a big code . However, the same can be achieved with the simple casting technique as code snippet can be achieved as below
double d = 135.0;
int integerValue = (int) d ;
Though double value is explicitly converted to integer value also called as downcasting.
...
How can I convert a Unix timestamp to DateTime and vice versa?
...
but this returns a double, I guess one needs to cast to long?
– knocte
May 6 '13 at 6:25
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How to parse a string into a nullable int
...this in one line, using the conditional operator and the fact that you can cast null to a nullable type (two lines, if you don't have a pre-existing int you can reuse for the output of TryParse):
Pre C#7:
int tempVal;
int? val = Int32.TryParse(stringVal, out tempVal) ? Int32.Parse(stringVal) : (in...
How to ignore SSL certificate errors in Apache HttpClient 4.0
...
I get the error that an X509TrustManager can't be cast to a TrustManager.
– MW.
Jan 16 '13 at 19:36
2
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What is a “bundle” in an Android application
...
why not just directly use System.object and cast ?
– lovespring
Aug 24 '14 at 12:23
...
How to suppress GCC warnings from library headers?
...hpp>
#include <boost/uuid/uuid_io.hpp>
#include <boost/lexical_cast.hpp>
// turn the warnings back on
#pragma GCC diagnostic pop
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Deserialize JSON with C#
...wing:
var jsonData = JObject.Parse("your JSON data here");
Then you can cast jsonData to JArray, and you can use a for loop to get data at each iteration.
Also, I want to add something:
for (int i = 0; (JArray)jsonData["data"].Count; i++)
{
var data = jsonData[i - 1];
}
Working with dynam...