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Address some possible issues in 1.2.11

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Vse Mozhe Buty 2020-09-20 14:21:10 +03:00
parent e074a5f825
commit 64f3015dfd
4 changed files with 12 additions and 12 deletions
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1-js/02-first-steps/11-logical-operators/article.md
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@ -84,7 +84,7 @@ The OR `||` operator does the following:
A value is returned in its original form, without the conversion.
In other words, a chain of OR `"||"` returns the first truthy value or the last one if no truthy value is found.
In other words, a chain of OR `||` returns the first truthy value or the last one if no truthy value is found.
For instance:
@ -101,9 +101,9 @@ This leads to some interesting usage compared to a "pure, classical, boolean-onl
1. **Getting the first truthy value from a list of variables or expressions.**
For instance, we have `firstName`, `lastName` and `nickName` variables, all optional.
For instance, we have `firstName`, `lastName` and `nickName` variables, all optional (i.e. can be undefined or have falsy values).
Let's use OR `||` to choose the one that has the data and show it (or `anonymous` if nothing set):
Let's use OR `||` to choose the one that has the data and show it (or `"Anonymous"` if nothing set):
```js run
let firstName = "";
@ -115,7 +115,7 @@ This leads to some interesting usage compared to a "pure, classical, boolean-onl
*/!*
```
If all variables were falsy, `Anonymous` would show up.
If all variables were falsy, `"Anonymous"` would show up.
2. **Short-circuit evaluation.**
@ -223,7 +223,7 @@ The precedence of AND `&&` operator is higher than OR `||`.
So the code `a && b || c && d` is essentially the same as if the `&&` expressions were in parentheses: `(a && b) || (c && d)`.
````
````warn header="Don't replace `if` with || or &&"
````warn header="Don't replace `if` with `||` or `&&`"
Sometimes, people use the AND `&&` operator as a "shorter way to write `if`".
For instance:
@ -244,7 +244,7 @@ let x = 1;
if (x > 0) alert( 'Greater than zero!' );
```
Although, the variant with `&&` appears shorter, `if` is more obvious and tends to be a little bit more readable. So we recommend using every construct for its purpose: use `if` if we want if and use `&&` if we want AND.
Although, the variant with `&&` appears shorter, `if` is more obvious and tends to be a little bit more readable. So we recommend using every construct for its purpose: use `if` if we want `if` and use `&&` if we want AND.
````