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What's the strangest corner case you've seen in C# or .NET? [closed]
... the amount of points given to customers. The issue was related to casting/converting double to int.
In code below:
double d = 13.6;
int i1 = Convert.ToInt32(d);
int i2 = (int)d;
does i1 == i2 ?
It turns out that i1 != i2.
Because of different rounding policies in Convert and cast operator the...
How to access environment variable values?
...:\Python. If you want to find out while running python you can do:
import sys
print(sys.prefix)
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What do the terms “CPU bound” and “I/O bound” mean?
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It's pretty intuitive:
A program is CPU bound if it would go faster if the CPU were faster, i.e. it spends the majority of its time simply using the CPU (doing calculations). A program that computes new digits of π will typically be CP...
How does this program work?
...g to print the float.
On why 0 is printed: The floating point number is converted to double before sending to printf. The number 1234.5 in double representation in little endian is
00 00 00 00 00 4A 93 40
A %d consumes a 32-bit integer, so a zero is printed. (As a test, you could printf("%d, ...
How do I turn off Oracle password expiration?
...rd;
Below is a little SQL*Plus script that a privileged user (e.g. user 'SYS') can use to reset a user's password to the current existing hashed value stored in the database.
EDIT: Older versions of Oracle store the password or password-hash in the pword column, newer versions of Oracle store the...
How does the String class override the + operator?
...simple expressions in Java
int x=15;
String temp="x = "+x;
The compiler converts "x = "+x; into a StringBuilder internally and uses .append(int) to "add" the integer to the string.
5.1.11. String Conversion
Any type may be converted to type String by string conversion.
A value x of pri...
Hash and salt passwords in C#
...em into config files. Hashes and salts are binary blobs, you don't need to convert them to strings unless you want to put them into text files.
In my book, Beginning ASP.NET Security, (oh finally, an excuse to pimp the book) I do the following
static byte[] GenerateSaltedHash(byte[] plainText, by...
In Clojure how can I convert a String to a number?
I have various strings, some like "45", some like "45px". How how I convert both of these to the number 45?
12 Answers
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Division of integers in Java [duplicate]
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Converting the output is too late; the calculation has already taken place in integer arithmetic. You need to convert the inputs to double:
System.out.println((double)completed/(double)total);
Note that you don't actually...
Meaning of $? (dollar question mark) in shell scripts
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$? returns the exit value of the last executed command. echo $? prints that value on console. zero implies a successful execution while non-zero values are mapped to various reason for failure.
Hence when scripting; I tend to use the following syntax
if [ $? -eq 0 ]; then
# do something...