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Add exercise sandbox and solution files
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‎.gitignore‎

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Original file line numberDiff line numberDiff line change
@@ -1,5 +1,6 @@
11
/tex/*
2-
/html/*.html
2+
/html/[01]*.html
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/html/js/exercise_data.js
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/code/chapter/*
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/node_modules
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.tern-port

‎04_data.txt‎

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@@ -1359,8 +1359,7 @@ console.log(deepEqual(obj, obj));
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// → true
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console.log(deepEqual(obj, {here: 1, object: 2}));
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// → false
1362-
console.log(
1363-
deepEqual(obj, {here: {is: "an"}, object: 2}));
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console.log(deepEqual(obj, {here: {is: "an"}, object: 2}));
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// → true
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----
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endif::html_target[]

‎05_higher_order.txt‎

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@@ -872,7 +872,7 @@ ifdef::html_target[]
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----
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var arrays = [[1, 2, 3], [4, 5], [6]];
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// Your code here.
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// → [1, 2, 3, 4, 5, 6];
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// → [1, 2, 3, 4, 5, 6]
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----
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endif::html_target[]
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‎06_object.txt‎

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@@ -1039,7 +1039,7 @@ console.log(new Vector(1, 2).plus(new Vector(2, 3)));
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// → Vector{x: 3, y: 5}
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console.log(new Vector(1, 2).minus(new Vector(2, 3)));
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// → Vector{x: -1, y: -1}
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console.log(new Vector(3, 4).norm);
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console.log(new Vector(3, 4).length);
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// → 5
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----
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endif::html_target[]

‎07_elife.txt‎

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@@ -1126,6 +1126,8 @@ local population booms or busts are less likely to wipe out a species
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entirely, and there is space for the relatively large prey
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population needed to sustain a small predator population.
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1129+
ifdef::html_target[]
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// test: no
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[source,javascript]
@@ -1159,6 +1161,8 @@ animateWorld(new LifelikeWorld(
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));
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----
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1164+
endif::html_target[]
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!!solution!!
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Many of the same tricks that worked for in the previous exercise also

‎08_error.txt‎

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@@ -792,9 +792,13 @@ withBoxUnlocked(function() {
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box.content.push("gold piece");
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});
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795-
withBoxUnlocked(function() {
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throw new Error("Pirates on the horizon! Abort!");
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});
795+
try {
796+
withBoxUnlocked(function() {
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throw new Error("Pirates on the horizon! Abort!");
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});
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} catch (e) {
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console.log("Error raised:", e);
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}
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console.log(box.locked);
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// → true
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----

‎09_regexp.txt‎

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@@ -1214,7 +1214,7 @@ endif::html_target[]
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First, do not forget the backslash in front of the dot.
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Matching the optional sign in front of the number, as well as in front
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of the exponent, can be done with `[+\-]?` or `(+|-|)` (plus, minus,
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of the exponent, can be done with `[+\-]?` or `(\+|-|)` (plus, minus,
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or nothing).
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The more complicated part of the exercise is the problem of

‎13_dom.txt‎

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@@ -946,7 +946,7 @@ the function.
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!!solution!!
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949-
== Elements by tag name ==
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=== Elements by tag name ===
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The `getElementsByTagName` method returns all child elements with a
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given tag name. Implement your own version of it, as a regular
@@ -1004,7 +1004,7 @@ own children.
10041004

10051005
!!solution!!
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1007-
== The cat's hat ==
1007+
=== The cat's hat ===
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10091009
Extend the spinning cat animation we defined earlier to have both the
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cat and his hat (`<img src="img/hat.png">`) spin around, at opposite
@@ -1024,7 +1024,7 @@ ifdef::html_target[]
10241024
// test: no
10251025

10261026
[source,text/html]
1027-
-----
1027+
----
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<img src="img/cat.png" id="cat" style="position: absolute">
10291029
<img src="img/hat.png" id="hat" style="position: absolute">
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‎14_event.txt‎

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@@ -831,7 +831,7 @@ Only one piece of JavaScript program can run at a time. Thus, event
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handlers and other scheduled scripts have to wait until other scripts
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finish, before they get their turn.
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834-
== Excercises ==
834+
== Exercises ==
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=== Censored keyboard ===
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‎17_http.txt‎

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@@ -867,7 +867,8 @@ function fail() {
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all([soon(1), fail(), soon(3)]).then(function(array) {
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console.log("We should not get here");
869869
}, function(error) {
870-
console.log("Failed with:", error);
870+
if (error.message != "boom")
871+
console.log("Unexpected failure:", error);
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});
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----
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