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What is the most pythonic way to check if an object is a number?
...s scalar-like. If you have values of different type (i.e. string, numeric, etc.) coming through, then the logic of your program may need some work - how did you end up trying to multiply a string by a numeric vector in the first place?
...
Performance differences between debug and release builds
...ted by code that runs elsewhere. Reading a file, executing a dbase query, etc. Making the work the JIT optimizer does completely invisible. It doesn't mind though :)
The JIT optimizer is pretty reliable code, mostly because it has been put to the test millions of times. It is extremely rare to ...
What's the point of OOP?
...works, various language collection types, the ASP.NET stack, The JSP stack etc... These are all things that heavily rely on OOP in their codebases.
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answered Aug 23 '08 a...
Samples of Scala and Java code where Scala code looks simpler/has fewer lines?
...(this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
Person person = (Person) o;
if (firstName != null ? !firstName.equals(person.firstName) : person.firstName != null) {
return false;
...
What are Runtime.getRuntime().totalMemory() and freeMemory()?
...tion</i>: May include no longer referenced objects, soft references, etc.
* that will be swept away by the next garbage collection.
*/
public long getUsed() {
return getAllocatedTotal() - getAllocatedFree();
}
/**
* <b>Maximum allocation</b>: the...
How to inherit from a class in javascript?
...e.log( Object.getPrototypeOf(Object.getPrototypeOf(tiger)) ); // Animal
// Etc. to get to Lifeform
Here is another good resource from MDN, and here is a jsfiddle so you can try it out.
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How to highlight cell if value duplicate in same column for google spreadsheet?
...ores the first occurence.
Finally the third term picks up duplicates 2, 3 etc. COUNTIF(C1:C, C1) >= 1 starts the search range at the currently evaluated row (the C1 in the C1:C). Then it only evaluates to TRUE (apply highlight) if there is one or more duplicates below this one (and including thi...
How to open every file in a folder?
...rent directory using os.listdir:
import os
for filename in os.listdir(os.getcwd()):
with open(os.path.join(os.cwd(), filename), 'r') as f: # open in readonly mode
# do your stuff
Glob
Or you can list only some files, depending on the file pattern using the glob module:
import glob
for ...
Naming convention for utility classes in Java
... type CustomerUtils by mistake, have to look it up, curse you a few times, etc. (I heard a lecture on consistency once where the speaker put up a slide showing an outline of his speech with three main points, labeled "1", "2nd", and "C".)
Never ever ever make two names that differ only in some subt...
What does “xmlns” in XML mean?
...the appropriate xmlns. For example, mash up friend of a friend with vCard, etc.
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