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List comprehension. A list comprehension is a syntactic construct available in some programming languages for creating a list based on existing lists. It follows the form of the mathematical set-builder notation ( set comprehension) as distinct from the use of map and filter functions.
Khan Academy is an American non-profit [3] educational organization created in 2006 by Sal Khan. [1] Its goal is to create a set of online tools that help educate students. [4] The organization produces short video lessons. [5] Its website also includes supplementary practice exercises and materials for educators.
Group by (SQL) A GROUP BY statement in SQL specifies that a SQL SELECT statement partitions result rows into groups, based on their values in one or several columns. Typically, grouping is used to apply some sort of aggregate function for each group. [1] [2]
Lie on your back with your knees bent, feet flat on the floor, and your arms extended by your sides. Pushing through your feet and bracing your core, raise your bottom off the ground until your ...
To do this exercise: Grab two dumbbells and hold one in each hand. Bend your torso at a 45-degree angle, and bend your elbows so they form a 90-degree angle. Then straighten your arms out directly ...
Shoulder and upper back stretch. To stretch the shoulders and back. Bend your right arm, raising it so your elbow is chest level and your right fist is near your left shoulder. Place your left ...
Merge (SQL) A relational database management system uses SQL MERGE (also called upsert) statements to INSERT new records or UPDATE existing records depending on whether condition matches. It was officially introduced in the SQL:2003 standard, and expanded [citation needed] in the SQL:2008 standard.
Step 1: Lie flat on your bed, a couch, or the floor. If it feels more comfortable, bend your knees so that your legs are at an angle. Place your hands on your stomach. Step 2: Direct your ...