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I am new to android, can anyone tell me what why is emailresult redundant?
From what I understand is that I retrieve textToUse from another method and name it email here, and then use email to undergo the matcher.find() with the result named emailresult. I then returned emailresult and after that returned the entire email.
I have mess around with it some time, like deleting emailresult and just use email. But then I will still have to create another variable to go under this location:
String emailresult = email.substring(matcher.start(), matcher.end());
It is redundant because you aren't doing anything with emailresult after assigning it a value besides returning it. You can simply do the following without the need to create a variable:
return email.substring(matcher.start(), matcher.end());
There is no need to create a variable
return email.substring(matcher.start(), matcher.end());
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in end of code is this error what problem? tried many fixes but no ones help
https://i.stack.imgur.com/jwosT.png
return (List<String>) ImmutableList.of();
The problem with this is that the type of ImmutableList.of() is determined before the cast is applied.
The type of ImmutableList.of() in that context is ImmutableList<Object>. An ImmutableList<Object> isn't an ImmutableList<String>.
I'm surprised you need any type hinting here:
return ImmutableList.of();
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source: this post
//Retrieve the values
Set<String> set = myScores.getStringSet("key", null);
//Set the values
Set<String> set = new HashSet<String>();
set.addAll(listOfExistingScores);
scoreEditor.putStringSet("key", set);
scoreEditor.commit();
is myScores refers to sharedpreference?
what is listOfExistingScores refers to? is it ArrayList?
is scoreEditor refers to ArrayList? or ListView? or custom ListView?
According to that answser you can say that those three variable defines following things :
myScores :
As you said in op, it's shared preference variable. It holdes sharedpreference.
listOfExistingScores :
It refers to the array declared by user. It is stored in hashset.
scoreEditor :
Score editor is sharedpreferences editor. You can read more details about it by given link.
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How can I generate string const in z3 through java-api? For integer, there are ctx.mkInt(int a) generate an IntExpr with value a and ctx.mkIntConst("a") generate an IntExpr with name "a". However, for string, I can only find ctx.mkString("a"), which is just a SeqExpr with value "a" similar as ctx.mkInt. So what I want is something like ctx.mkStringConst("a") but there is no such function.
I find in python api, what I want is is simply str = String("a")
Try the following.
String variable_name="foo";
Expr variable = context.mkConst(context.mkSymbol(variable_name), context.mkStringSort());
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I want to compare my result(string) and I'm using following code to check it.
result = "password";
if (result.equals(R.string.myResponse)) {
//do something
}
R.string file
<string name="myResponse">password</string>
Above function is not working and doesn't get into if part.
However, If I replace R.string.myResponse with its actual value by if(result.equals("password")) then it is working fine.
What's the problem using string value from R.string
R.string.myResponse is not a string it is an ID for a string.
You need to get the string using that ID.
Something like context.getString(R.string.myResponse) or if you are in an activity or fragment then just getString(R.string.myResponse).
Replace
R.string.myResponse
with
getResources().getString(R.string.myResponse);
R.string.myResponse will return an integer value that is the ID of the particular string resource. You can use getString(R.string.myResponse) to get the String stored for that ID. To be on safe side use getResources().getString(R.string.myResponse) as getString() sometimes return null.
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is there a way to tell the compiler in Java or Android to not remove some statements in code -which are intended to clean up variables after use to prevent any data remnant in ram-??
would creating a dummy method solve this issue??
these statements basically set the variables to their type-based initial values..
Thanks in advance!
The code that you describe is not dead code.
Dead code is code that will never execute.
Here is an example:
private int secretSchmarr;
public boolean blammo()
{
boolean returnValue;
secretSchmarr = calculateSecretValue();
returnValue = useSecretValue(secretSchmarr);
secretSchmarr = 99; // this is not dead code.
return returnValue;
secretSchmarr = 98; // This is dead code because it can never execute.
}
I answer under the odd assumption that you have a good reason to believe that the code is still useful even though it is dead.
Store the value false in some obfuscated form that the compiler can't understand. Then, conditionally branch to that code using your obfuscated value. The compiler will not know it is dead, so it will not be removed.
I'll use a file for my example, but it is probably not the most efficient way. Say your code that the compiler thinks is dead code was in a function called myCode(). Assume that fin is reading from a file that only contains false followed by EOF
if(Boolean.parseBoolean(fin.next()))
myCode();