Javascript: difference between a statement and an expression?

Are all statements also expressions? “Wherever JavaScript expects a statement, you can also write an expression. Such a statement is called an expression statement. The reverse does not hold: you cannot write a statement where JavaScript expects an expression. For example, an if statement cannot become the argument of a function.” This is comes from … Read more

C# conditional operator error Only assignment, call, increment, decrement, await, and new object expressions can be used as a statement

The conditional operator is an expression, not a statement, that means it cannot stand alone, as the result has to be used somehow. In your code, you don’t use the result, but try to produce side effects instead. Depending on the condition before the ? the operator returns the result of either the first or … Read more

Regular expression to match a word or its prefix

Square brackets are meant for character class, and you’re actually trying to match any one of: s, |, s (again), e, a, s (again), o and n. Use parentheses instead for grouping: or non-capturing group: Note: Non-capture groups tell the engine that it doesn’t need to store the match, while the other one (capturing group does). For small stuff, either works, for ‘heavy duty’ stuff, you … Read more

expected expression before ‘{‘ token

The error is because you can’t assign an array that way, that only works to initialize it. So applying this to your specific example: or you could use memset the same way, but instead of sizeof(int) you need size of your structure. That doesn’t always work… but given your structure, it will.

Regular expression to match a word or its prefix

Square brackets are meant for character class, and you’re actually trying to match any one of: s, |, s (again), e, a, s (again), o and n. Use parentheses instead for grouping: or non-capturing group: Note: Non-capture groups tell the engine that it doesn’t need to store the match, while the other one (capturing group does). For small stuff, either works, for ‘heavy duty’ stuff, you … Read more