我有来自服务器的字符串:
//A
123|155-244
|
之后的数字始终表示'绿色'-
之后的数字始终表示'蓝色'这里的问题是Green和Blue可以按任意顺序返回:
//B
123-244|155
或者他们可能完全失踪:
//C
123|155
我需要一个函数来返回一个数组/对象以简化操作:
//A
var result = {red:"123", green:"155", blue:"244"}
//B
var result = {red:"123", green:"155", blue:"244"}
//C
var result = {red:"123", green:"155", blue:"0"}
我尝试过两个函数,一个是Green,另一个是Blue,但是我意识到它不能正常运行,具体取决于它们出现在字符串中的顺序。
var getGreen = function(myvar){
return myvar.split('-');
};
var getBlue = function(myvar){
return myvar.split('|');
};
这样做有时会导致我的对象看起来像这样:
var result = {red:"123", green:"155", blue:"244|155"}
我该怎么办?
答案 0 :(得分:17)
不需要正则表达式:
parse = function(s) {
return {
red: parseInt('+' + s, 10) || 0,
green: parseInt(s.split('|')[1], 10) || 0,
blue: parseInt(s.split('-')[1], 10) || 0,
};
};
//
test = [
'123',
'222|333-444',
'55-66|77',
'123|456',
'123-456',
'|123-456',
'-123|456',
'010|020-030',
];
test.map(parse).forEach(r =>
document.write('<pre>' + JSON.stringify(r) + '</pre>'));
这使用parseInt
在第一个非可解析字符处停止并在给定垃圾时返回虚假值的事实。 '+' + s
hack是使前导破折号无效(否则会被误认为减号)。
答案 1 :(得分:10)
你最好使用Regexp
来匹配这个 - 一个字符串的每一部分。
exec()
每个正则表达式和匹配项将存储在结果数组的索引1中。如果没有匹配项,则null
会返回exec()
,因此请使用[null, 0]
的虚拟数组来简化操作。
虽然不是必需的,但如果没有红色值,这也有效。
function getRGB() {
var reRed = /^([0-9]+)/; // start of string (^) then match 1+ numbers
var reGreen = /\|([0-9]+)/; // a "|" then match 1+ numbers
var reBlue = /-([0-9]+)/; // a "-" then match 1+ numbers
return {
red: (reRed.exec(input) || [null, 0])[1],
green: (reGreen.exec(input) || [null, 0])[1],
blue: (reBlue.exec(input) || [null, 0])[1]
};
}
// RGB
var input = '123|155-244';
console.log(input, getRGB(input));
// RBG
var input = '123-244|155';
console.log(input, getRGB(input));
// RB
input = '123-244';
console.log(input, getRGB(input));
// BG
var input = '-244|155';
console.log(input, getRGB(input));
答案 2 :(得分:5)
您可以将String#match
与RegEx一起使用。
var str = '123|155-244';
var result = {
red: (str.match(/^\d+/) || [0])[0], // Get first digits or zero
green: (str.match(/\|(\d+)/) || [0, 0])[1], // Get digits after `|` or zero
blue: (str.match(/-(\d+)/) || [0, 0])[1] // Get digits after `-` or zero
};
console.log(result);
document.getElementById('pre').innerHTML = JSON.stringify(result, 0, 4);
&#13;
<pre id="pre"></pre>
&#13;
原始回答
误解为-
和|
是可以互换的,但颜色序列将固定为红色,绿色,然后是蓝色。
您可以将 String#split
与正则表达式一起使用。
var str = '123|155-244';
var colors = ['red', 'green', 'blue'];
var result = {};
var arr = str.split(/\||-/g);
arr.forEach((e, i) => result[colors[i]] = arr[i]);
console.log(result);
document.getElementById('result').innerHTML = JSON.stringify(result, 0, 4);
&#13;
<pre id="result"></pre>
&#13;
正则表达式说明:
简单的正则表达式\||-
将按管道|
或-
拆分字符串。
另一个现场演示:
var colors = ['red', 'green', 'blue'];
document.getElementById('input').addEventListener('keyup', function() {
var str = this.value;
var result = {};
var arr = str.split(/\||-/g);
arr.forEach((e, i) => result[colors[i]] = arr[i]);
console.log(result);
document.getElementById('result').innerHTML = JSON.stringify(result, 0, 4);
}, false);
&#13;
<input id="input" />
<pre id="result"></pre>
&#13;
答案 3 :(得分:3)
你说第一个数字总是红色所以
myString = "123-155|244";
red = "0";
green = "0";
blue = "0";
red = mysString.substring(0,3);
if(myString.indexOf("|")!=-1)
{
green = mystring.substring(myString.indexOf("|")+1,myString.indexOf("|")+4);
}
if(myString.indexOf("-")!=-1)
{
blue = mystring.substring(myString.indexOf("-")+1,myString.indexOf("-")+4);
}
console.log(red+green+blue);
答案 4 :(得分:2)
您可以使用string.match(regex)
:
var str = "123|155-244", // <--------the string
arr = str.match(/(\d{3})+/g), // <----creates array out of str
obj = {
red: arr[0], // put first one as red value
green: arr[1], // second one as green value
blue: arr.length == 3 ? arr[2] : "000" // as per length of array put blue value
};
document.querySelector('pre').innerHTML = JSON.stringify(obj);
&#13;
<pre></pre>
&#13;
答案 5 :(得分:2)
可能这就是你想要的,并根据你的需要写一些其他条件
var color = {red:null,blue:null,green:null};
var s ="123-244|155";
var blue_index = s.indexOf("|") ;
var green_index = s.indexOf("-") ;
if(blue_index>green_index){
color.blue = s.split("|")[1];
s = s.split("|")[0];
}else{
color.green = s.split("-")[1];
s = s.split("|")[0];
}
if(s.indexOf("|") > -1){
color.blue = s.split("|")[1];
color.red = s.split("|")[0];
}
if(s.indexOf("-") > -1){
color.green = s.split("-")[1];
color.red = s.split("-")[0];
}
答案 6 :(得分:2)
你可以试试这个,最后尝试用所有3个条件进行测试 -
var obj =[{"id":"6dq1oht32tdp66i9s2bd9a21lk@group.calendar.google.com","title":null,"events":[{"start":{"date":null,"time":"2016-02-16T10:00:00+01:00"},"end":{"date":null,"time":"2016-02-16T11:00:00+01:00"},"location":"Kreuzberg, Berlin, Germany","description":"Basketball Test","color_id":"1","ical_uid":"a5fq8vu8gur943bucj5ajr2mb4@google.com"},{"start":{"date":null,"time":"2016-02-15T20:00:00+01:00"},"end":{"date":null,"time":"2016-02-15T21:00:00+01:00"},"location":"Prenzlauer Berg, Berlin, Germany","description":"Football test","color_id":"9","ical_uid":"od9404scajlnskmsc8t32peljk@google.com"},{"start":{"date":null,"time":"2016-02-17T09:00:00+01:00"},"end":{"date":null,"time":"2016-02-17T10:00:00+01:00"},"location":"Neuk\u00f6lln, Berlin, Germany","description":"Baseball Test","color_id":"7","ical_uid":"jtek50q1pche91gl5q1i1pk028@google.com"},{"start":{"date":null,"time":"2016-02-18T10:00:00+01:00"},"end":{"date":null,"time":"2016-02-18T11:00:00+01:00"},"location":"Baseball Test","description":"Baseball Test","color_id":"2","ical_uid":"71l2cak9b7jvp1fmpuc68fshg8@google.com"},{"start":{"date":null,"time":"2016-02-16T20:00:00+01:00"},"end":{"date":null,"time":"2016-02-16T21:00:00+01:00"},"location":"Somewhere","description":"Elsewhere","color_id":"2","ical_uid":"d6d20ep8tvlo594eeinhv02170@google.com"},{"start":{"date":null,"time":"2016-02-13T08:00:00+01:00"},"end":{"date":null,"time":"2016-02-13T09:00:00+01:00"},"location":"Prenzlauer Berg, Berlin, Germany","description":"YEAH! Football!","color_id":"1","ical_uid":"qm3vrnd73eqnls2lsurm9hmc3s@google.com"},{"start":{"date":null,"time":"2016-02-15T09:00:00+01:00"},"end":{"date":null,"time":"2016-02-15T10:00:00+01:00"},"location":"Neuk\u00f6lln, Berlin, Germany","description":"test name","color_id":"2","ical_uid":"7t4l93vnkfedhaeuk3vkaqmssg@google.com"}]}];
var converted = [];
$.each(obj[0].events,function(i,eItem){
formatted = moment(eItem.start.time);
converted.push({
date: formatted.format('YYYY-MM-DD'),
formatted_date: formatted.format('DD.MM.YY'),
formatted_time: formatted.format('HH:mm') + ' Uhr',
location: eItem.location,
description: eItem.description,
link: eItem.ical_uid,
category: eItem.color_id == null ? 'default' : eItem.color_id
});
});
console.log(converted);
答案 7 :(得分:-1)
请尝试此代码 HTML: -
<h1 id="red">Red</h1>
<h1 id="green">Green</h1>
<h1 id="blue">Blue</h1>
<input type="submit" id="byBtn" value="Change" onclick="change()"/>
JavaScript的: -
var myvar="123-244|155";
var getGreen = myvar.split('-');
var getBlue = getGreen[1].split('|');
function change(){
red.innerHTML+=" ="+getGreen[0];
blue.innerHTML+=" ="+getBlue[0];
green.innerHTML+=" ="+getBlue[1];
}