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What is the best (idiomatic) way to check the type of a Python variable? [duplicate]
...ct
True
btw note the is operator. However, type checking (if you want to call it that) is usually done by wrapping a type-specific test in a try-except clause, as it's not so much the type of the variable that's important, but whether you can do a certain something with it or not.
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How to create a CPU spike with a bash command
...null
This results in high kernel (sys) load from the many write() system calls.
If you prefer mostly userland cpu load:
seq 3 | xargs -P0 -n1 timeout 5 md5sum /dev/zero
If you just want the load to continue until you press Ctrl-C:
seq 3 | xargs -P0 -n1 md5sum /dev/zero
...
String replacement in java, similar to a velocity template
... threw together a small test implementation of this. The basic idea is to call format and pass in the format string, and a map of objects, and the names that they have locally.
The output of the following is:
My dog is named fido, and Jane Doe owns him.
public class StringFormatter {
pr...
How to set commands output as a variable in a batch file
...ile,like a logger program,
First make a file with a single enter key in it called e.txt
set /P Data=<log0.log
set /P Ekey=<e.txt
@echo %Data%%Ekey%%NewData%>log0.txt
your log will look like this
Entry1
Entry2
and so on
Anyways a couple useful things
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Java Generics: Cannot cast List to List? [duplicate]
...ings from b1, and they're guaranteed to be compatible with Tree. You can't call b1.add(...) precisely because the compiler won't know whether it's safe or not.
Have a look at this section of Angelika Langer's Java Generics FAQ for more information.
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What does (x ^ 0x1) != 0 mean?
... @supercat: When a conversion from floating-point to integer is called for, the conversion is implicit (doesn't require cast syntax). But no conversion is triggered by bitwise operators, they simply fail for floating-point types.
– Ben Voigt
Dec 20 ...
How do I import CSV file into a MySQL table?
...a MySQL table so that I can refactor into a sane format. I created a table called 'CSVImport' that has one field for every column of the CSV file. The CSV contains 99 columns , so this was a hard enough task in itself:
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Calculate the center point of multiple latitude/longitude coordinate pairs
...sion takes an NSArray of NSValues that contain MKMapCoordinates, which was called for in my implementation:
#import <MapKit/MKGeometry.h>
+ (CLLocationCoordinate2D)centerCoordinateForCoordinates:(NSArray *)coordinateArray {
double x = 0;
double y = 0;
double z = 0;
for(NSVa...
Get number of digits with JavaScript
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length is a property, not a method. You can't call it, hence you don't need parenthesis ():
function getlength(number) {
return number.toString().length;
}
UPDATE: As discussed in the comments, the above example won't work for float numbers. To make it working we ...
How to set specific java version to Maven
... Old, but throwing in my 2cents. I am working on a Java 8 service that is called by a Java 7 application. To avoid having to switch constantly when building, I (on windows) created a MVN_JAVA_HOME environment variable, and then replace every occurrence of JAVA_HOME with MVN_JAVA_HOME inside mvn an...