JavaScript: Assignment Operators
Assignment Operators
An assignment operator assigns a value to its left operand based on the value
of its right operand. The first operand must be a variable and basic assignment operator is equal (=), which assigns
the value of its right operand to its left operand. That is, a = b assigns the value of b to a.
In addition to the regular assignment operator "=" the other assignment operators are shorthand for standard operations, as shown
in the following table.
Shorthand | Expression | Description |
---|---|---|
a +=b | a = a + b | Adds 2 numbers and assigns the result to the first. |
a -= b | a = a - b | Subtracts 2 numbers and assigns the result to the first. |
a *= b | a = a*b | Multiplies 2 numbers and assigns the result to the first. |
a /=b | a = a/b | Divides 2 numbers and assigns the result to the first. |
a %= b | a = a%b | Computes the modulus of 2 numbers and assigns the result to the first. |
a<<=b | a = a<<b | Performs a left shift and assigns the result to the first operand. |
a>>=b | a = a>>b | Performs a sign-propagating right shift and assigns the result to the first operand. |
a>>>=b | a = a>>>b | Performs a zero-fill right shift and assigns the result to the first operand. |
a&= b | a = a&b | Performs a bitwise AND and assigns the result to the first operand. |
a^= b | a = a^b | Performs a bitwise XOR and assigns the result to the first operand. |
a |=b | a = a|b | Performs a bitwise OR and assigns the result to the first operand. |
Previous: JavaScript: Arithmetic Special Operators (%, ++, --, - )
Next: JavaScript: Bitwise Operators
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JavaScript: Tips of the Day
Converts a string to title case
Example:
const toTitleCase = str => str .match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g) .map(x => x.charAt(0).toUpperCase() + x.slice(1)) .join(' '); console.log(toTitleCase('some_database_field_name')); // 'Some Database Field Name' console.log(toTitleCase('Some label that needs to be title-cased')); // 'Some Label That Needs To Be Title Cased' console.log(toTitleCase('some-package-name')); // 'Some Package Name' console.log(toTitleCase('some-mixed_string with spaces_underscores-and-hyphens')); // 'Some Mixed String With Spaces Underscores And Hyphens'
Output:
"Some Database Field Name" "Some Label That Needs To Be Title Cased" "Some Package Name" "Some Mixed String With Spaces Underscores And Hyphens"
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