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How to concatenate twice with the C preprocessor and expand a macro as in “arg ## _ ## MACRO”?
... completely macro replaced as if they formed the rest of the preprocessing file; no other
preprocessing tokens are available.
In the invocation NAME(mine), the argument is 'mine'; it is fully expanded to 'mine'; it is then substituted into the replacement string:
EVALUATOR(mine, VARIABLE)
Now...
How to get the input from the Tkinter Text Widget?
...)
demo = Demo(root, text="text.get(start, end=None)")
with open(__file__) as f:
demo.text.insert('1.0', f.read())
demo.text.update_stats()
demo.pack(fill='both', expand=True)
root.mainloop()
sha...
What exactly is Hot Module Replacement in Webpack?
...nd chunk ids are consistent between these builds. It uses a "records" json file to store them between builds (or it stores them in memory).
From the module view
HMR is a opt-in feature, so it only affects modules that contains HMR code. The documentation describes the API that is available in modu...
Which parts of Real World Haskell are now obsolete or considered bad practice?
...(>>=) and return. This leads us to the real definition of State.
-- file: ch14/State.hs
newtype State s a = State
runState :: s -> (a, s)
}
That's no longer true, because State and its friends are now implemented via
type State s = StateT s Identity
type Writer w = WriterT w Iden...
Node.js and CPU intensive requests
... out of the web-server is a GOOD thing. Keeping each task in "separate" js file promotes modularity and code reuse. It forces you to think about how to structure your program in a way that will make it easier to debug and maintain in the long run. Another benefit of a task queue is the workers can b...
How to add a custom right-click menu to a webpage?
...ice result (JSFiddle)
HTML
<menu id="ctxMenu">
<menu title="File">
<menu title="Save"></menu>
<menu title="Save As"></menu>
<menu title="Open"></menu>
</menu>
<menu title="Edit">
<menu title=...
How to test my servlet using JUnit
...mport java.io.*;
import javax.servlet.http.*;
import org.apache.commons.io.FileUtils;
import org.junit.Test;
public class TestMyServlet extends Mockito{
@Test
public void testServlet() throws Exception {
HttpServletRequest request = mock(HttpServletRequest.class);
Ht...
What's the right way to pass form element state to sibling/parent elements?
...ct.createContext(null); with the child components so I can create separate files?
– APorter1031
Sep 23 at 20:51
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Why are joins bad when considering scalability?
...s certainly not just to store structured data (you could do that with flat file constructs like csv or xml). A few of the options I listed will even let you completely build your join in advance, so the results are already done before you issue the query — just as if you had denormalized the data ...
Difference between a “coroutine” and a “thread”?
...in that process. A process "owns" all its assigned resources, like memory, file handles, sockets, device handles, etc., and these resources are all shared among its kernel threads.
The operating system scheduler is part of the kernel that runs each thread for a certain amount time (on a single proc...