In computer science, there is the notion of the edit distance between two strings. 1  For example, the words dog and dot, which vary by only one letter, are closer than dog and cat, which differ by three letters. This idea is used in spell checkers and in coding theory, and is mathematically formalized in several different ways, such as: 1  Levenshtein distance. 2  Hamming distance. 3  Lee distance. 4  JaroâWinkler distance. 5  N-gram distance.
The Three Sisters. The traditional Native American planting of corn, beans and squash makes an ideal companion combination. Corn is planted first, and when it is tall enough to provide support, pole beans are planted next to each corn stalk. The beans provide nitrogen to the corn, and the corn provides a stalk for the beans to climb.
Good Companion Plants for Zucchini and Summer Squash. Corn: Corn shares space well with zucchini and summer squash, since it grows vertically while the squash grow along the ground. The squash plants also help shade the soil to reduce the weeds that compete with the corn plants. Both corn and summer squash have the same moisture and soil fertility requirements, so they are very good neighbors.