Month: December 2022

[Solved] MainActivity.kt doesn’t see button’s id?

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You’re writing your code outside of MainActivity‘s onCreate (or any other) method scope. Your code is: class MainActivity: AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) } button3.setOnClickListener { } } But must be: class MainActivity: AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) button3.setOnClickListener { // do something } } } You … Read more

[Solved] Decoding declaration(a combination of array and function pointers) in C [closed]

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That code is not a declaration, but it can be interpreted as an expression. (*I_dont_know())[(int) ((*ptr))] Call the function I_dont_know with no arguments. This function returns a pointer to something. Dereference the returned pointer to get some object. Meanwhile, dereference the value of ptr and cast it to an int value. Then pass that int … Read more

[Solved] add 10 empty rows to gridview [closed]

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var list = new List<string>(); for (int i = 0; i < 10; i++) { list.Add(string.Empty); } gv_Others.DataSource = list; gv_Others.DataBind(); This is the quickest and dirtiest way I could think of, would I write something like this? No. But then I’m sure you have your reasons, would have been better if you’d written in … Read more

[Solved] invalid conversion from ‘const char*’ to ‘char* [closed]

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Well that’s because c_str() returns a const char * and not a char * Just change the line to: const char * c = s.c_str(); and the function declaration to std::string Exec(const char* cmd) Like noted before and you’re good to go. See it live here. solved invalid conversion from ‘const char*’ to ‘char* [closed]

[Solved] Get link’s text in javascript

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$(“.myid”).click(function (event) { // I want to prevent the elements default action (thanks @ Rajaprabhu Aravindasamy). event.preventDefault(); alert($(this).text()); }); JSFIDDLE. Read more about preventDefault here. 1 solved Get link’s text in javascript

[Solved] what does “x = (something)” mean in java?

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Creates objectref for Object TextView TextView mainTextView; findViewById is a method having parameter R.id.main_textview and the returned value is getting casted to TextView type and stored in mainTextView mainTextView = (TextView) findViewById(R.id.main_textview); solved what does “x = (something)” mean in java?

[Solved] Java code making error [closed]

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There are two issues. Update the getFacebookContent() method in FacebookPerson to return the content using fb object as below. public String getFacebookContent(){ return fb.getContent(); } Implement getContent() method in Facebook as below: public String getContent(){ return content; } In addition, you may want to initialize content variable as Initial_Content instead of null as you are … Read more

[Solved] P value of R t.test() function [closed]

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From ?t.test – my emphasis: alternative: a character string specifying the alternative hypothesis, must be one of ‘”two.sided”‘ (default), ‘”greater”‘ or ‘”less”‘. You can specify just the initial letter. 1 solved P value of R t.test() function [closed]