Please show your love and support by sharing this post. Similarly, in the following cases, () does a " strict equality comparison":Ĭonsole.log(.includes(2)) // trueĬonsole.log(.includes(4)) // falseĬonsole.log(.includes(+0)) // trueĬonsole.log(.includes(-0)) // trueĬonsole.log(.includes('foo')) // trueĬonsole.log(.includes('Foo')) // falseĬonsole.log(.includes('fo')) // false This is the same as it would happen in a strict equals ( =) comparison: This means, for example, that a numeric string won't equal its integer counterpart: Other than that one exception, Same-Value-Zero algorithm and strict equality actually yield the same result. For example:Ĭonsole.log(.includes(NaN)) // true Try it Syntax includes(searchString) includes(searchString, position) Parameters searchString A string to be searched for within str. Add/remove items We already know methods that add and remove items from the beginning or the end: arr.push (. To make things easier, in this chapter they are split into groups. However, in a stricter sense, the " strict equality comparison" differs from the ( Same-Value-Zero) algorithm () method uses under the hood in terms of NaN equality. The includes () method performs a case-sensitive search to determine whether one string may be found within another string, returning true or false as appropriate. Array methods The JavaScript language DecemArray methods Arrays provide a lot of methods. You could technically say that the JavaScript () method does a strict equality comparison of values.
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