javascript-objects

问题 Javascript is not my first language of choice, nor is it one I am all that well versed in. Functional stuff fine, objects, not so much. I am looking to see if anyone can suggest options for dealing with the following scenario. function postcodeEntry(destination,postcode) { "use strict"; document.getElementById('googlemappostcode').innerHTML = <?php if ($_GET['page']==="fun") echo "<div id=\"map\"></div>' + ";?>'<form id="postcodeEntry" method="post" action="/" onsubmit="calcRoute(\'driving\'

问题 Javascript is not my first language of choice, nor is it one I am all that well versed in. Functional stuff fine, objects, not so much. I am looking to see if anyone can suggest options for dealing with the following scenario. function postcodeEntry(destination,postcode) { "use strict"; document.getElementById('googlemappostcode').innerHTML = <?php if ($_GET['page']==="fun") echo "<div id=\"map\"></div>' + ";?>'<form id="postcodeEntry" method="post" action="/" onsubmit="calcRoute(\'driving\'

问题 Let me preface this with the admission that I am a complete programming and javascript noob and that fact is the source of my trouble. I'm trying to populate a large array of custom objects from a text file that I've saved to with json.stringify. When I grab the file contents and json.parse(them), I get the following error: var backSlashRemoved = text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@' ^ TypeError: Object (contents of file) has no method 'replace' The code that causes this

问题 Let me preface this with the admission that I am a complete programming and javascript noob and that fact is the source of my trouble. I'm trying to populate a large array of custom objects from a text file that I've saved to with json.stringify. When I grab the file contents and json.parse(them), I get the following error: var backSlashRemoved = text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@' ^ TypeError: Object (contents of file) has no method 'replace' The code that causes this

问题 This question already has answers here : How to combine an array in javascript (3 answers) Group array of object nesting some of the keys with specific names (2 answers) Closed 2 years ago . Working with an array of objects like: const arr = [ {name: "qewregf dqewafs", value: "qewregf dqewafs answer", count: 2}, {name: "survey with select", value: "survey with select answer", count: 2}, {name: "werasd", value: "Donald", count: 1}, {name: "werasd", value: "Jim", count: 1} ]; I am trying to

问题 This question already has answers here : How to combine an array in javascript (3 answers) Group array of object nesting some of the keys with specific names (2 answers) Closed 2 years ago . Working with an array of objects like: const arr = [ {name: "qewregf dqewafs", value: "qewregf dqewafs answer", count: 2}, {name: "survey with select", value: "survey with select answer", count: 2}, {name: "werasd", value: "Donald", count: 1}, {name: "werasd", value: "Jim", count: 1} ]; I am trying to

问题 This question already has answers here : How to combine an array in javascript (3 answers) Group array of object nesting some of the keys with specific names (2 answers) Closed 2 years ago . Working with an array of objects like: const arr = [ {name: "qewregf dqewafs", value: "qewregf dqewafs answer", count: 2}, {name: "survey with select", value: "survey with select answer", count: 2}, {name: "werasd", value: "Donald", count: 1}, {name: "werasd", value: "Jim", count: 1} ]; I am trying to

问题 I have the following code snippet: if([]) { console.log("first is true"); } The console says first is true which means [] is true. Now I am wondering why this: if([] == true) { console.log("second is true"); } and this: if([] === true) { console.log("third is true"); } are not true . If the console logged first is true in the first snippet, that means [] should be true, right? So why do the latter two comparisons fail? Here is the fiddle. 回答1: This is by specification. By the ECMAScript 2015

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: Self-references in object literal declarations I have an object literal which is used as a configuration element and is looked up for keys. customRendering:{ key1: func(){....}, key2: func(){....} } I have a situation where key2 and key3 can use the same function. Is there a way to assign the same function to both key2 and key3 without having to declare the function outside the object literal and without having

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: Self-references in object literal declarations I have an object literal which is used as a configuration element and is looked up for keys. customRendering:{ key1: func(){....}, key2: func(){....} } I have a situation where key2 and key3 can use the same function. Is there a way to assign the same function to both key2 and key3 without having to declare the function outside the object literal and without having