To expand on Jon’s answer, the reason this doesn’t work is because in regular, non-dynamic code extension methods work by doing a full search of all the classes known to the compiler for a static class that has an extension method that matches. The search goes in order based on the namespace nesting and available … Read more
Since C99, C has 2D arrays with dynamical bounds. If you want to avoid that such beast are allocated on the stack (which you should), you can allocate them easily in one go as the following double (*A)[n] = malloc(sizeof(double[n][n])); and that’s it. You can then easily use it as you are used for 2D … Read more
Use the LayoutInflater to create a view based on your layout template, and then inject it into the view where you need it. LayoutInflater vi = (LayoutInflater) getApplicationContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE); View v = vi.inflate(R.layout.your_layout, null); // fill in any details dynamically here TextView textView = (TextView) v.findViewById(R.id.a_text_view); textView.setText(“your text”); // insert into main view ViewGroup insertPoint = … Read more
There is no standard way to find this information. However, some implementations provide functions like msize to do this. For example: _msize on Windows malloc_size on MacOS malloc_usable_size on systems with glibc Keep in mind though, that malloc will allocate a minimum of the size requested, so you should check if msize variant for your … Read more
ng-bind-html-unsafe only renders the content as HTML. It doesn’t bind Angular scope to the resulted DOM. You have to use $compile service for that purpose. I created this plunker to demonstrate how to use $compile to create a directive rendering dynamic HTML entered by users and binding to the controller’s scope. The source is posted … Read more
Contrary to other answers already posted you cannot modify locals() directly and expect it to work. >>> def foo(): lcl = locals() lcl[‘xyz’] = 42 print(xyz) >>> foo() Traceback (most recent call last): File “<pyshell#6>”, line 1, in <module> foo() File “<pyshell#5>”, line 4, in foo print(xyz) NameError: global name ‘xyz’ is not defined Modifying … Read more
The class ChartPanel is convenient for this, as it has methods to control the chart’s overall appearance, including properties and zoom state. In addition it’s also possible to access the chart’s components, as shown below. This related example illustrates a JToolBar of zoom buttons. import java.awt.BorderLayout; import java.awt.EventQueue; import java.awt.FlowLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import … Read more
In C since C99, even dynamic multidimensional arrays can be easily allocated in one go with malloc and freed with free: double (*A)[n] = malloc(sizeof(double[n][n])); for (size_t i = 0; i < n; ++i) for (size_t j = 0; j < n; ++j) A[i][j] = someinvolvedfunction(i, j); free(A);
The short answer, or TL;DR Basically, eval is used to evaluate a single dynamically generated Python expression, and exec is used to execute dynamically generated Python code only for its side effects. eval and exec have these two differences: eval accepts only a single expression, exec can take a code block that has Python statements: … Read more
After 5.0.13, in stored procedures, you can use dynamic SQL: delimiter // CREATE PROCEDURE dynamic(IN tbl CHAR(64), IN col CHAR(64)) BEGIN SET @s = CONCAT(‘SELECT ‘,col,’ FROM ‘,tbl ); PREPARE stmt FROM @s; EXECUTE stmt; DEALLOCATE PREPARE stmt; END // delimiter ; Dynamic SQL does not work in functions or triggers. See the MySQL documentation … Read more