static bool operator >(CSSRuleData& r1, CSSRuleData& r2) { int spec1 = r1.selector()->specificity(); int spec2 = r2.selector()->specificity(); return (spec1 == spec2) : r1.position() > r2.position() : spec1 > spec2; }

Firefox 使用的是 Gecko，这是 Mozilla 公司“自制”的呈现引擎。而 Safari 和 Chrome 浏览器使用的都是 WebKit。

<Foo superLongParam="bar" anotherSuperLongParam="baz" />

new Date(...[2016, 8, 5]);

// good const errorMessage = 'This is a super long error that was thrown because of Batman. When you stop to think about how Batman had anything to do with this, you would get nowhere fast.';

// good inbox.filter((msg) => { const { subject, author } = msg; if (subject === 'Mockingbird') { return author === 'Harper Lee'; } return false; });

tsc hello.ts

Reducers are just pure functions that take the previous state and an action, and return the next state.

svg.selectAll("circle") .data([32, 57, 112, 293]) .enter().append("circle") .attr("cy", 60) .attr("cx", function(d, i) { return i * 100 + 30; }) .attr("r", function(d) { return Math.sqrt(d); });

barWidth / 2

efficient manipulation of documents based on data

The idea behind this design was that it would make programming in JavaScript easier for beginners. In actuality, it mostly makes finding problems in your programs harder because the system will not point them out to you.

It would accept almost anything I typed but interpret it in a way that was completely different from what I meant.