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Difference between java.util.Random and java.security.SecureRandom
... these data store them in files - /dev/random and /dev/urandom in case of linux/solaris) and uses that as the seed. So if the small token size is okay(in case of Random), you can continue using your code without any changes, since you are using SecureRandom to generate the seed. But if you want lar...
Getting image dimensions without reading the entire file
... This function is perfect on windows. but it not working on linux, it will still read entire file on linux. (.net core 2.2)
– zhengchun
Jan 10 '19 at 7:12
add a...
Pass ruby script file to rails console
..._root")"
bundle exec rails runner "eval(File.read '$rp')"
}
relpath() {python -c "import os.path; print os.path.relpath('$1','${2:-$PWD}')";}
Example:
cd ~/rails_project/app/helpers
rr my_script.rb
Based on @moritz's answer here. I changed it, since the working directory for File.read is th...
Mock vs MagicMock
...is the more capable class it makes a sensible one to use by default." docs.python.org/dev/library/…
– Robino
Sep 10 at 11:57
add a comment
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...
Finding Number of Cores in Java
...");
} else if (isUnix()) {
System.out.println("This is Unix or Linux");
} else if (isSolaris()) {
System.out.println("This is Solaris");
} else {
System.out.println("Your OS is not support!!");
}
}
public static boolean isWindows() {
return (OS.indexOf("w...
How to sort a list of strings?
What is the best way of creating an alphabetically sorted list in Python?
11 Answers
1...
Alternatives to gprof [closed]
...is a relatively new tool for profiling the kernel and user applications on Linux I decided to add this information.
First of all - this is a tutorial about Linux profiling with perf
You can use perf if your Linux Kernel is greater than 2.6.32 or oprofile if it is older. Both programs don't requir...
Simple C example of doing an HTTP POST and consuming the response
...
Handle added.
Added Host header.
Added linux / windows support, tested (XP,WIN7).
WARNING: ERROR : "segmentation fault" if no host,path or port as argument.
#include <stdio.h> /* printf, sprintf */
#include <stdlib.h> /* exit, atoi, malloc, free */
#i...
What is the difference between JDK and JRE?
...is purpose, the JRE contains some .dll (Windows) or .dylib (macOS) or .so (Linux) files under bin/ or lib/ with supporting, system-specific native binary code.
The JDK is also a set of directories. It is a superset of the JRE, with some additions:
bin/ has been enlarged with development tools. T...
Constructing pandas DataFrame from values in variables gives “ValueError: If using all scalar values
...
Perhaps it is because the order of items in a list in Python are persistent whereas the ordering of items in a dictionary are not. You can instantiate a DataFrame with an empty dictionary. In principle I suppose a single-row DataFrame as shown here would also be ok to build from...