I'm mapping an endpoint to fetch an object by it's ID from an array of Objects this is my request mapping: @RequestMapping(value =&quot;/items/{Id}&quot;, method = RequestMethod.GET)  public Item getItemById(@PathVariable(&quot;Id&quot;) String Id) throws NoSuchItem { return ItemList.getItemById(Id); }  this is my getItemById function in my ItemList class,  private static ArrayList&lt;Item&gt; itemList;   public static Item getItemById(String id) throws NoSuchItem {     for(Item x:itemList){          if(x.getId()== id)           return x;      }      throw new NoSuchItem();  }  this is the JSON representation of my itemList array which has 3 Item objects, [ {     &quot;name&quot;: &quot;Mars&quot;,     &quot;supplier&quot;: &quot;Nestle&quot;,     &quot;weight&quot;: &quot;1&quot;,     &quot;id&quot;: &quot;mars&quot;,     &quot;location&quot;: null }, {     &quot;name&quot;: &quot;Kit Kat&quot;,     &quot;supplier&quot;: &quot;Nestle&quot;,     &quot;weight&quot;: &quot;1&quot;,     &quot;id&quot;: &quot;kitkat&quot;,     &quot;location&quot;: null }, {     &quot;name&quot;: &quot;Double Decker&quot;,     &quot;supplier&quot;: &quot;Nestle&quot;,     &quot;weight&quot;: &quot;1&quot;,     &quot;id&quot;: &quot;dd&quot;,     &quot;location&quot;: null } ]  I want my /items/{id} endpoint to return only the desired Item, But it throws a 404 error, what am I doing wrong here? PS- I'm sending my requests through POSTMAN the cURl command for my postman request is as follows; curl --location --request GET 'localhost:8082/items/mars'
I've been using the == operator in my program to compare all my strings so far. However, I ran into a bug, changed one of them into .equals() instead, and it fixed the bug.  Is == bad? When should it and should it not be used? What's the difference?
Creating a row for each value in a comma-separated string I'm currently trying to create a View from a Table that does the following:  Table A ╔═════════════╦═══════════════╗  ║ PART NUMBER ║   FILE NAME   ║ ╠═════════════╬═══════════════╣ ║  PN0001-01  ║      FOO      ║ ║  PN0002-01  ║      BAR      ║ ║  PN0003-01  ║    FOO,BAR    ║ ║  PN0004-01  ║  BAR,FOO,FOB  ║ ╚═════════════╩═══════════════╝   To create  View B ╔═════════════╦═══════════════╗  ║ PART NUMBER ║   FILE NAME   ║ ╠═════════════╬═══════════════╣ ║  PN0001-01  ║      FOO      ║ ║  PN0002-01  ║      BAR      ║ ║  PN0003-01  ║      FOO      ║ ║  PN0003-01  ║      BAR      ║ ║  PN0004-01  ║      BAR      ║ ║  PN0004-01  ║      FOO      ║ ║  PN0004-01  ║      FOB      ║ ╚═════════════╩═══════════════╝   So, essentially, I need to take records from Table A and insert them into View B, where if the record from A has a LIKE '[,]' property, then that field is split into multiple records in B, depending on the number of times the ',' is present, with the text between each ',' being given its own record in View B. Prove $f(S \cup T) = f(S) \cup f(T)$ $f(S \cup T) = f(S) \cup f(T)$  $f(S)$ encompasses all $x$ that is in $S$ $f(T)$ encompasses all $x$ that is in $T$  Thus the domain being the same, both the LHS and RHS map to the same $y$, since the function $f$ is the same for both.  Can you post the solution? In my D&amp;D 5e campaign one of the PCs who's a wood elf started dating a dark elf, and as a result she got pregnant and she is about to give birth. One of the other players had their PC die and he is considering playing as the child of the couple.  My question is, which race is the child going to be? Making all row sums and column sums non-negative by a sequence of moves How to install pip for python 3 in ubuntu 12.04 LTS Ubuntu GNOME 17.04: wi-fi not working -- mac address keeps changing? My Panda USB wi-fi adapter works just fine on 16.10, but when I try to connect to my wi-fi router in 17.04, GNOME network manager reports "Connection failed." I did some tinkering, and noticed that my MAC address for my wifi adapter, according to GNOME, is DIFFERENT every time I make it forget my wifi settings and try to reconnect. Any leads on a possible fix or work-around?   I'm running Ubuntu GNOME 17.04, kernel 4.10.0-19-generic, GNOME 3.24.0. Redefining \listoffigures and \listoftables as tables Let's assume that one has some HP printer and/or scanner and checked its support status on the corresponding page of HPLIP site - .  So one have the following information: the device Model name, Min. HPLIP Version and Driver Plug-in need.   What should one install to make Ubuntu fully support the HP printer and/or scanner? I am looking to create some handwriting drill sheets.  Similar to what can be found here    I also found this question:  But I'd like to be able to simply write a paragraph of text with a known font and have the lines placed behind, perhaps like a watermark.  I have found a git repo with some nice lines in both portrait and landscape here   From the kindergarten example, I would like to overlay "phantom" text (probably a dotted cursive font) over the lines that are generated.  Any thoughts?  \documentclass[10pt,letterpaper]{article}  \usepackage[latin9]{inputenc} \usepackage{geometry} \geometry{verbose,tmargin=1cm,bmargin=1cm,lmargin=1cm,rmargin=1cm} \pagestyle{empty} \usepackage{dashrule} \usepackage{forloop} \makeatother  \setlength{\parindent}{0pt}  \begin{document}  \newcounter{ct} \forloop{ct}{1}{\value{ct} &lt; 13} { \vskip 10pt \rule[1.75ex]{7.5in}{1pt} \\ \hdashrule{7.75in}{1pt}{4mm} \\ \rule[-1.75ex]{7.5in}{1pt} \\ }  \vskip 1cm  \end{document}   *Edit: I also just found this source:    So some combination of these makes sense to me, I'm just not clear on how...  *Edit: Okay, So I've gotten pretty far here.  But it seems like several parameters need to be functions of each other some how.  The line spacing, the font size, etc.  Here is where I am:  \documentclass[10pt,letterpaper,english]{article}  \usepackage{babel}  \usepackage{blindtext}   \usepackage{setspace}  \usepackage[latin9]{inputenc} \usepackage{geometry} \geometry{verbose,tmargin=1cm,bmargin=1cm,lmargin=1cm,rmargin=1cm} \pagestyle{empty} \usepackage{dashrule} \usepackage{forloop} \makeatother  \usepackage{xcolor}  \newcommand{\baselinegrid}{%   \raisebox{0pt}[\height][0pt]{\makebox[0pt][l]{%   \begin{minipage}[t]{\textwidth}%     \begin{color}{red}%     \newcounter{ct}     \forloop{ct}{1}{\value{ct} &lt; 11}     {     %\vskip 15pt     \rule[0.5ex]{7.5in}{1pt}     \\     \hdashrule[0.75ex]{7.75in}{1pt}{4mm}     \\     \rule[1.2ex]{7.5in}{1pt}     \\     }     \end{color}   \end{minipage}% }}}  \begin{document}    \baselinegrid%  \begin{spacing}{2.5}    \usefont{T1}{wela}{m}{n}   \fontsize{30}{15}\selectfont   \setlength{\parskip}{0pt}   \setlength{\parindent}{0pt}    DURING the whole of a dull, dark, and soundless day in the autumn of the year, when the clouds hung oppressively low in the heavens, I had been passing alone, on horseback, through a singularly dreary tract of country; and at length found myself, as the shades of the evening drew on, within view of the melancholy House of Usher.  \end{spacing}  \end{document} Favorite questions in the Android app Keeping tables/figures close to where they are mentioned Is there any package or a method to force LaTeX to keep floating environments like table and figure closer to where they are declared? Compact operators on an infinite dimensional Banach space cannot be surjective I am reading a book about functional analysis and have a question:      Let $X$ be a infinite-dimensional Banach-space and $A:X \rightarrow X$ a compact operator. How can one show that $A$ can not be surjective? Can we really not tell if we are moving? It has been a while since I've thought about physics, however, I remember something about how if you are on a train with no windows that is going perfectly straight and is perfectly smooth, there is no experiment that you could perform to prove that you are in motion or at rest. So I have a couple of questions related to this.   Is this still held to be true? I was just wondering if anything in physics has come to light since I learned about this (about 10 years ago) that would allow an observer on the train to tell if they are moving. If this is true, why couldn't you accelerate a particle in different directions to a certain mass and measure how much energy it took to get it up to that mass. If you were moving in any direction, wouldn't you measure less energy in your direction of travel? Would having an outside observer affect the aforementioned experiment in any way? When I place a multipage pdf file into InDesign CC, the pages go outside of my document settings, making this function useless.  What do I have to do to make the placed  pdf pages go within my document settings, which in this case is 11 in. Length X 8.5 in. width, .5 in. margins on all sides, with two columns per page. I would greatly appreciate an answer to this, Thank you. Mute conversations on Skype I'm in a conversation and I don't really want to leave because the people there keep adding me back so it's just whatever. But I would like to mute the conversation or something like I do on Facebook so I won't take notifications or anything from there unless I press on the group and see what's going on. Because for now I have my Skype having a new notifications every half a second.  Any solutions to that? Can I travel to Paris for a day with a single entry visa for Schengen from Switzerland? I am visiting a friend in Switzerland for ten days. I have already got visitor's visa for the same on my Indian passport. Particulars mentioned on my visa are:  1. 'Etats Schengen' , 2. Single entry 3. Dates of visit. &amp; 4. Type of visa : C.  I understand that having already got ‘Etats Schengen' visa, I can travel to all Schengen countries.  I am also planning to visit Paris for a day during my stay in Switzerland. However, I never mentioned this in my visa application. I am planning to take a train from Geneva to Paris and book a hotel in Paris for one night. Can I possibly plan my Paris trip this way as I have Schengen visa, or I am not allowed to travel out of Switzerland as I never mentioned this in my visa application?   Also what does Single entry on my Schengen visa means: does it mean that I can enter and leave Switzerland only once or it means that I can enter and leave the Schengen region only once. JSON URL from StackExchange API returning jibberish? Primitive Pythagorean triple divisible by 3 Pure virtual destructor in C++ ArcMap Attribute Table not seen when second screen disconnected from Main Computer?