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Added variable scope examples #18

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Merged
MarkCBJSS merged 1 commit into from
Jul 13, 2020
Merged

Added variable scope examples #18

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2 changes: 1 addition & 1 deletion README.md
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Expand Up @@ -16,7 +16,7 @@ If there's anything that you think could be improved due to misunderstanding, th
# The 1000 Things
Structure of the repo Things are as *folder > main js file*, along with the supporting HTML and CSS files.

(9) Scope example > variable-scope-by-example.js<br>
(9) Variable and let scope example > variable-scope-by-example.js / let-scope...<br>
(8) Maths Hero > updated-maths-engine.js<br>
(7) Game Sounds > soundPlayer.js<br>
(6) Name Changer > namechange.js<br>
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11 changes: 11 additions & 0 deletions variable-scope-by-example/let-scope-by-example.js
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@@ -0,0 +1,11 @@
let aVariableOutsideACodeBlock = 10;

if (aVariableOutsideACodeBlock == 10) {
let aVariableINSIDE = 20;
console.log("aVariableOutsideACodeBlock called from INSIDE the code block is : " + aVariableOutsideACodeBlock);
console.log("aVariableINSIDE called inside and set inside is: " + aVariableINSIDE);
}
// The below works if we use var, change the var keywords to let and it will fail
// This demonstrates the better scope control of let
console.log("## We now call a let set inside a block, but from the outside, so should see an error");
console.log("aVariableINSIDE called from OUTSIDE a code block, but set INSIDE that code block is: " + aVariableINSIDE);
13 changes: 7 additions & 6 deletions variable-scope-by-example/variable-scope-by-example.js
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Original file line number Diff line number Diff line change
@@ -1,10 +1,11 @@
var aVariableOutsideACodeBlock = 10;

if (aVariableOutsideACodeBlock == 10) {
var aVariableINSIDE = 20;
console.log("(aVariableOutsideACodeBlock) equals " + aVariableOutsideACodeBlock);
console.log("(aVariableINSIDE) equals " + aVariableINSIDE);
}
if (aVariableOutsideACodeBlock == 10) {
//var aVariableOutsideACodeBlock = 20;
var aVariableINSIDE = 30;
console.log("aVariableOutsideACodeBlock called from INSIDE the code block is : " + aVariableOutsideACodeBlock);
console.log("aVariableINSIDE called inside and set inside is: " + aVariableINSIDE);
}
// The below works if we use var, change the var keywords to let and it will fail
// This demonstrates the better scope control of let
console.log("(aVariableINSIDE) called from outside equals " + aVariableINSIDE);
console.log("aVariableINSIDE called from OUTSIDE a code block, but set INSIDE that code block is: " + aVariableINSIDE);