IT Nursery
I want to check my environment for the existence of a variable, say "FOO", in Python. For this purpose, I am using the os standard library. After reading the...
I’m new to bash and I’m stuck at trying to negate the following command: wget -q --tries=10 --timeout=20 --spider http://google.com if [[ $? -eq 0 ]]; then echo "Sorry...
Can the mutate be used when the mutation is conditional (depending on the values of certain column values)? This example helps showing what I mean. structure(list(a = c(1, 3,...
I’ve been thinking of some beginner mistakes and I ended up with the one on the if statement. I expanded a bit the code to this: int i =...
I’ve seen Bash scripts test for a non-zero length string in two different ways. Most scripts use the -n option: #!/bin/bash # With the -n option if [ -n...
I have a method that calls 4 other methods in sequence to check for specific conditions, and returns immediately (not checking the following ones) whenever one returns something Truthy....
I have a string that I load throughout my application, and it changes from numbers to letters and such. I have a simple if statement to see if it...
I was reading Java’s ArrayList source code and noticed some comparisons in if-statements. In Java 7, the method grow(int) uses if (newCapacity - minCapacity < 0) newCapacity = minCapacity;...
So far whenever I needed to use a conditional statement within a Widget I have done the following (Using Center and Containers as simplified dummy examples): new Center( child:...
I couldn’t find any one simple straightforward resource spelling out the meaning of and fix for the following BASH shell error, so I’m posting what I found after researching...