I am having two client-side controller methods, How to pass the response of the first wire method as a parameter to the second wire method. The second wire method is dependent on the first methods returned data.  @wire(method2, { oinputmap: "$inputMap", intname: "$interName" })   wiredresponse({ error, data }) {     //({ oinputmap: this.inputMap,intname: this.interName })     if (data) {       var responseObj = JSON.parse(data);       console.log("result activate card" + responseObj);       if (responseObj.Result.Code === 0) {         this.description = "Card Activated." + responseObj.Result.Description;         //TODO: Update XPAC in card       } else {         this.description = responseObj.Result.Description;       }       console.log("result" + responseObj.Result.Description);     } else if (error) {       console.log("buildandcallinterface:Exception in fetching card number");     }   }
According to the documentation  in order to retrieve a list of picklist values for an object we need to pass in a Record Type Id which can be retrieved using the getObjectInfo method.   The issue is that these are both wire functions and I cannot figure out how to chain these methods.  If I try code like the following:  getObjectInfo({ objectApiName: ACCOUNT_OBJECT })             .then(result =&gt; {                 return getPicklistValues({recordTypeId: result.defaultRecordTypeId, fieldApiName: TYPE_FIELD});             })             .then(result =&gt; {                 this.picklistValues = result.data             })             .catch(error =&gt; {                 this.error = error;             });   I get an error      render threw an error in 'c:getpicklistexample' [Imperative use is not   supported. Use @wire(getObjectInfo).]   If I try something like   @track rtId;      @wire(getObjectInfo, { objectApiName: ACCOUNT_OBJECT })     handleResult({error, data}) {         if(data) {             this.rtId = data.defaultRecordTypeId;         }     }      @wire(getPicklistValues, {recordTypeId: this.rtId,fieldApiName: TYPE_FIELD})     picklistValues;   Then it throws an internal server error. Anybody have an idea as to how I could retrieve the record type Id and then call to get the pick list values like the documentation suggests?  FYI my imports are:  import { LightningElement, wire, track } from 'lwc'; import { getPicklistValues, getObjectInfo } from 'lightning/uiObjectInfoApi'; import TYPE_FIELD from '@salesforce/schema/Account.Type'; import ACCOUNT_OBJECT from '@salesforce/schema/Account';
That's basically the question, is there a "right" way to implement operator&lt;&lt; ? Reading  I can see that something like:  friend bool operator&lt;&lt;(obj const&amp; lhs, obj const&amp; rhs);   is preferred to something like   ostream&amp; operator&lt;&lt;(obj const&amp; rhs);   But I can't quite see why should I use one or the other.  My personal case is:  friend ostream &amp; operator&lt;&lt;(ostream &amp;os, const Paragraph&amp; p) {     return os &lt;&lt; p.to_str(); }   But I could probably do:  ostream &amp; operator&lt;&lt;(ostream &amp;os) {     return os &lt;&lt; paragraph; }   What rationale should I base this decision on?  Note:   Paragraph::to_str = (return paragraph)    where paragraph's a string. Blender 2.8 contains a number of HDRi's in it by default for the LookDev. I'd like to know how to use them in final renders (EEVEE or Cycles), because quite frankly they appear fantastic. "Unable to install GRUB in /dev/sda" when installing GRUB I recently bought a shiny new Lenovo Yoga 2 Pro and I want to dual boot it with Ubuntu for studying purposes. Its built-in OS is Windows 8.1 and it has a 256GB SSD.  I've made a separate 90GB partition just for Ubuntu and a live USB to install it.  The first time everything seemed to work great, I solved the wifi issued by blacklisting ideapad_laptop, the installation went flawlessly and Ubuntu worked fine.  When I got up the next morning and turned on my laptop it booted into Windows right away without ever showing the GRUB menu. So I tried to reset, and checked my partitions with the Disk Manager and everything looked fine. Since I couldn't find a solution online I went ahead and formatted the partition to try and install again. This time and every time since, the installation was aborted and I got a fatal error saying:  Unable to install GRUB in /dev/sda Executing `grub-install /dev/sda` failed. This is a fatal error.   Can anyone please suggest a solution to this problem? If any further information is needed I would be happy to provide it. Thanks.  When installing I get the following in details:  ubuntu kernel: [ 1946.372741] FAT-fs (sda2): error, fat_get_cluster: invalid cluster chain (i_pos 0). ubuntu grub-installer: error: Running 'grub-install --force failed. Why does thermal radiation only occur at infrared and visible frequencies? The resources that I've checked out seem to say thermal radiation only occurs in the infrared and visible spectrum. For example my heat transfer textbook and the Wikipedia page on .  In my mind thermal radiation is just energy emitted as a result of internal collisions from temperature. So, since temperature can range from 0K to huge numbers, I would think you would have a similar range of emitted energies. So then thermal radiation could occur throughout the whole of the electromagnetic spectrum. In the simple linear regression case $y=\beta_0+\beta_1x$, you can derive the least square estimator $\hat\beta_1=\frac{\sum(x_i-\bar x)(y_i-\bar y)}{\sum(x_i-\bar x)^2}$ such that you don't have to know $\hat\beta_0$ to estimate $\hat\beta_1$  Suppose I have $y=\beta_1x_1+\beta_2x_2$, how do I derive $\hat\beta_1$ without estimating $\hat\beta_2$? or is this not possible? Mark a comment as the answer to a question I have a question and have seen others to which the best and most relevant answer (at least the one that solved my particular problem) is placed in the comments to the question as opposed to the answers:   I would like to recognize the commenter as the person who correctly answered the question, but there doesn't seem to be any way to do that. The only thing I could think of was to ask the commenter to repost his comment as an answer, but I cannot figure out a way to contact him. In the meantime the question is sitting unanswered and I am getting other "answers" (leading me to believe that people are not reading the comments and answers already posted before trying to answer it themselves).  How are we supposed to do this?  Note: I don't want to accept the comment as an answer (I agree completely with the answers to this question that comments are comments and answers are answers and they should stay that way). I do wonder if there should be some way to contact people in a reasonable manner (comments on their profile that they must opt in to receiving in email?). I am a final year PhD in UK in a scientific discipline and I am writing my thesis. I have already published 2 journal papers and I have submitted 2 more papers for publications. My department does not allow a "publications-based" thesis so I need to write a thesis in the context of a book etc.   As I write my thesis in a couple of places, especially in the literature review, I tend to reuse sentences from my publications. I try to restate them a bit, maybe change some words for their synonyms etc. but it is practically me writing about what I wrote before. It goes without saying that I cite/quote me at the end of a passage if I say something non-obvious (I found that slightly funny. :) ). The problem is that occasionally I am just explaining for instance how a certain estimation technique works; in that case I cite the original authors and not myself. The syntax in those occasions though is practically the same as the original passage I used in my publication; as I have explained it once and was consider good, I find no reason to reinvent myself (I do a mild rewording as I mentioned but that is quite insignificant). Same things goes for listings. I do cite my paper in the beginning of a big list as the list's source but the list itself is almost identical as the one in "my" paper; in those cases I don't use quotations, just attribution "[]".  Is there an obvious guideline? The basic definition of plagiarism "reproducing the work of another person's as your own" is not (directly) applicable to me because I am the other person (almost *); if I am using other people's work I do cite them but I don't cite myself, citing them, in quotation marks!  I am a bit "fuzzy" about how not to plagiarize myself in my thesis (I have had no problem regarding my journal publications).  (* In all publications mentioned I am the first -but not sole- author.) I have a large set of pictures, and I want to apply predefined settings to each using the optional argument of the \includegraphics macro from the graphicx package.  I would like to define the settings once at the top of the file (like \def\settings{width=\textwidth, angle=90}), and then apply them to all of my images so that I can modify all of the settings from one place.  If I run the following code block, it gives me the versions of the error "Package xkeyval Error: 'width=\textwidth, angle=90' undefined in families 'Gin'", which seems to be because it's interpreting my entire group of settings as a single key input.  \documentclass{article} \usepackage{graphix} \begin{document}      \def\settingsA{width=\textwidth, angle=90}     \def\settingsB{page=1, scale=.1}     \def\settingsC{angle=90, scale=.5}      \begin{figure}         \includegraphics[\settingsA]{filename1.png}         \label{fig:oneofonehundred}     \end{figure}      \begin{figure}         \includegraphics[\settingsB]{filename2.pdf}         \label{fig:twoofonehundred}     \end{figure}      \begin{figure}         \includegraphics[\settingsC]{filename3.jpg}         \label{fig:threeofonehundred}     \end{figure}   \end{document}   What is the technique to modify this settings string so that it is interpreted correctly? How do I pass an optional argument that is interpreted as a set of arguments instead of one string?  Thanks in advance! How to split a very long equation (using AMSMATH package)? As I am seeing this,  the man and boat will have different displacement from ground frame,  so there should be a net work done by friction .  The books says,  total work done by friction is zero when friction is static and internal to system. Please explain.. The correct omission of the definite and indefinite articles I was recently in a bit of a quandary over which answer to accept to .  Of the answers I got, two were the clear leaders and, of course, I up-voted both. Choosing a 'winner' was more difficult though as their approaches were quite different.  Answer A addressed my question and provided a clear and well thought out response. I'd anticipate that this answer would be of most use to a user who found my question via a search. Selecting this would probably be the more community-focused way to go.  Answer B took a more lateral approach and made some guesses at the business logic behind my request, suggesting that I might be asking the wrong question. Their solution was based on this assumption - and they were spot on. Answer B formed the basis of my fix for the problem.  So... Best answer to the question or best solution to the problem - they may not always be the same thing.   I took the selfish approach and went with B. I'm not losing sleep over it, but I do wonder if I did the right thing? Is there a word for four times as much, analogous to once, twice, and thrice? I'm creating side skirts for a truck and I am duplicating the frames I want. The problem is it's making the duplicated object into another object. How do I put it into the same one? How can I delete an email address from Outlook's email history? Where is the right place to register/enqueue scripts & styles I tried out several image editors mentioned on  but some of them (like  and ) were very disappointing. These apps were too simple and low level.  What do you suggest for a (preferably free) image editor on OS X?  P.S: I was using  on Linux and also know that it was released for OS X too, but I want to find new good applications. How do I enable automatic updates? Update Manager is constantly offering me updates (e.g. security fixes, updates from PPAs).  How can I tell my Ubuntu installation to automatically download and install updates whenever they become available? I was just looking at the statistics for migrated questions in the  mod tools, and noticed this oddity:    The actual statistics, as visible to any 10k+ SFF user , are: 6 migrated to Worldbuilding, 2 to Literature, 2 to SFF meta, 1 to Movies &amp; TV, 1 to Writers, and 1 to Aviation.  Why is one of the meta migrations showing up with a blank icon rather than with the other?  Both migrated questions were closed as duplicates on meta. Both were migrated by 5 community members without mod involvement. One of the stubs on main has since been deleted, but so have the stubs for some of the other migrated questions. I can't think of anything to explain this discrepancy. Make IN clause behave like AND clause I've asked the same question on , but got no answer, so that's why I'm asking it here (I've read that simple sql questions should be asked at SO, but I have no choice).  Suppose I have 3 tables: posts, post_categories and categories. I'm implementing some kind of page with filters where I can filter posts by categories. User can select multiple categories. When he selects more than one, they should be summed. I can't get it working. What I have now is simple IN() SQL clause:  SELECT posts.id, post_categories.category_id FROM posts  JOIN post_categories ON posts.id = post_categories.post_id  WHERE post_categories.category_id IN (1,2,3) LIMIT 10;   But it is not matching all ids, it is OR and I need AND. What I need here is to find all posts that have categories with id=1 AND id=2 AND id=3, but instead this query returns posts that have at least one category from the IN() list.