为什么Ocaml不支持development:
some_username: XXXXXXXXX
some_password: YYYYYYYYY
test:
some_username: XXXXXXXXX
some_password: YYYYYYYYY
production:
some_username: XXXXXXXXX
some_password: YYYYYYYYY
secret_key_base: ZZZZZZZZZ
# `secret_key_base:` must NOT be indented !
# It must be put at the very start of a new line.
# There is also no need for it in development or test environment,
# since there are no attacks to be expected.
的{{1}}表达式操作？
（即//Define line chart with and height
const width = fullWidth - margin.left - margin.right;
const height = fullHeight - margin.top - margin.bottom;
//Define x and y scale range
let xScale = d3.scaleLinear()
.range([0, width])
let yScale = d3.scaleLinear()
.range([0, height])
//Define x and y axis
let xAxis = d3.axisBottom(xScale)
.ticks(15)
let yAxis = d3.axisLeft(yScale)
.ticks(10)
//Draw svg
let svg = d3.select("body")
.append("svg")
.attr("width", fullWidth)
.attr("height", fullHeight)
.append("g")
.attr("transform", "translate(" + 53 + "," + 0 +")");
d3.json("https://api.myjson.com/bins/izmg6").then(data => {
console.log(data);
//Structure data so should be an array of arrays etc [[x,y], [x,y], [x,y]]
let years = d3.keys(data[0]).slice(0, 50);
console.log(years);
let dataset = [];
data.forEach((d, i) => {
let myEmissions = [];
years.forEach(y => {
if (d[y]) {
myEmissions.push({
country: d.countryName,
year: y,
amount: d[y]
})
}
})
dataset.push({
country: d.countryName,
emissions: myEmissions
});
})
console.log(dataset);
//Define x and y domain
xScale
.domain(d3.extent(years, d =>d))
yScale
.domain([d3.max(dataset, d =>
d3.max(d.emissions, d =>
+d.amount)), 0])
//Generate line
let line = d3.line()
.curve(d3.curveBasis)
.x(d =>
xScale(d.year))
.y(d =>
yScale(d.amount));
let groups = svg.selectAll("g")
.data(dataset)
.enter()
.append("g")
groups.append("title")
.text(d => d.country)
groups.selectAll("path")
.data(d => [d.emissions])
.enter()
.append("path").classed("line", true)
.attr("d", line)
.style("stroke-width", d =>
d.country === "China" ? 10 : 0.5
)
}).catch(error => console.log(error))
，# (*) int int -> int）
答案 0 :(得分：0)
因为(*是OCaml语法中注释的开始：
(* hello, I'm a comment *)
解决方法是添加空格：
( * ) 9 9
是*运算符。
答案 1 :(得分：0)
它支持，您只需要在字符之间添加一个空格即可使解析器将其与注释区分开：( * )。