The IDL Way

• Is there a fast way to get the sum of the diagonals of an array?
• "My IDL program speed improved from 3 days to 32 seconds by removing loops!" A National Enquirer exclusive interview.
• Are FOR loops the embodiment of pure evil?
• Wow! Are FOR loops really as bad as JD says they are?
• How can I find the union, intersection, and difference between sets A and B?
• "Drizzling", "chunking" and other array decimation tricks using Histogram, naturally.
• How can I do maximum value resampling of an image using a sampling box of arbitrary size?
• Small examples to illuminate the IDL Way.
• How do I construct a vector with values from one vector and a repeat count from another?
• Is there a fast way to find the intersection between a vector and an array?
• What is the “IDL Way” to average components of a time series?
• What is the best way to do odd-line smoothing of an array?
• How you show me the IDL Way to turn an 8-bit color image into a 24-bit image?
• Given XY pairs, how can I find the indices to perform an operation on the pairs using a Z data range?
• Can you show me the IDL Way to count specific values in small regions of an image?
• What is the IDL Way to remove arbitrary rows from a 2D array?