How to test for 3 or more items in Minecraft inventory?
How to test for minimum amount of items in inventory and execute a command if true
Is it true that the order of $ab$ is always equal to the order of $ba$? An inequality involving 4 real or complex numbers Let a,b,c,d be real or complex numbers with absolute value less than $1$. Is the following true:  $$|ab-cd| \leq |a-c| +|b-d|?$$ Amazon RDS - Online only when needed? How can I take a photo using a slow shutter speed without it being overexposed? When I try to take a picture using a slow shutter speed in daylight it is overexposed. How can I change the settings so it isn't overexposed? Expression Functions for Lightning Web Components How can expression functions similar to Visualforce and Lightning Aura Components be achieved within lightning web components?   For example, &lt;template if:true={index % 5 == 0}&gt;&lt;br&gt;&lt;/template&gt; expression index % 5 == 0 is not compyling at all.  accountList.html  &lt;template&gt;     &lt;template if:true={accounts.data}&gt;         &lt;template for:each={accounts.data} for:item='item' for:index='index'&gt;             &lt;!--LWC DOES NOT SUPPORT EXPRESSION FUNCTIONS--&gt;             &lt;!--&lt;template if:true={index % 5 == 0}&gt;&lt;br&gt;&lt;/template&gt;--&gt;             {item}         &lt;/template&gt;     &lt;/template&gt; &lt;/template&gt;   accountList.js  import {LightningElement, wire} from 'lwc'; import getAccounts from '@salesforce/apex/TestController.getAccounts';  export default class AccountList extends LightningElement {      @wire(getAccounts) accounts;  }   Since LWC doesn't support Expression Functions, I'd like to know how to implement them. At what time will the upcoming Ubuntu release be made available? Every six months a new Ubuntu version will be released. Does anyone know at which time this will be? Schengen visa for two subsequent short trips: One visa or two? I will go to France from 17/12/13 – 19/12/13, then I will come back to London. And again I will go back to Portugal and Spain from 26/12/13 to 03/01/14 which I will stay in Spain for the longest period. However, the Spanish consulate told me that I have to request for the visa from the French consulate.  The point is: Do I need to apply for a visa for a single trip two times (from French and Spanish consulate) or a single visa for multiple time (from French consulate). $\operatorname{rank}(T^3) + \operatorname{rank}(T) \geq 2\operatorname{rank}(T^2)$ for finite-dimensional $V$ Consider a finite-dimensional vector space $V$ over the field $\mathbb{F}$ with a linear operator $T.$ Prove that we have $\operatorname{rank}(T^3) + \operatorname{rank}(T) \geq 2 \operatorname{rank}(T^2).$   First, let us assume that $\dim_{\mathbb{F}}(V) = n.$ Our immediate observations include that $T^3(V) \subseteq T^2(V) \subseteq T(V)$ so that $\operatorname{rank}(T^3) \leq \operatorname{rank}(T^2) \leq \operatorname{rank}(T)$ and $\operatorname{rank}(T^3) \geq \operatorname{rank}(T) + \operatorname{rank}(T^2) - n$ by Sylvester's Rank Inequality. Can we do some manipulations with what we have to get the desired inequality, or do we require something else? How to line up the pieces at the coast near the shipwreck? In The Witness, I was walking along the coast, and I came upon this:    Now, since I've learned      that mazes can be embedded in the environment,   I see the puzzle here, but I just can't get the pieces to line up well enough.  Standing on the couch and walking all around it doesn't seem to get me a       functional maze.   Where do I need to stand to activate the puzzle successfully? Does it increase security if the CBC chunks of a AES-256 encrypted bytestream are uploaded to different clouds? I want to backup my data according to the 3-2-1 rule. I am already back up to 2 different drives (2 different systems) at home. In addition, I would like to use cloud storage (Google, Amazon, etc.). Considering the future weakening of cryptography by advancements in computing power (e.g. key guessing by quantum computing) I want my data to be as safe as possible because once it's uploaded it's prone to decryption in the future (i can't guarantee the data is deleted if I delete it from the cloud(s)). Does it increase the security of my data if I split the CBC chunks to let's say 2 clouds? Uploading the even-numbered CBC elements to e.g. Google and the odd-numbered elements to Amazon. Since one storage hoster is constantly missing the next part of the CBC-Chain (1/2 in total) shouldn't this increase security of the data even if the AES key is known by the hoster(s)? Get full path of the files in PowerShell A Variation of the even-town odd-town problem Let assume facebook has $n$ users. Mark Zuckerberg decided that people are allowed to open groups under the following restrictions:      1) No two different groups can exactly the same participants.      2) The number of users in each group is even.      3) Every two group has an odd number of common users.      Denote by $m$ the maximal number of groups that can be formed in facebook under the restrictions mentioned above. Prove $m \leq n$.   I tried solving this by defined a matrix, multiplying it by its transpose and using some rank considerations I thought I could derive the bound, but I didn't succeed. Could you please give me a hint?  The question had anther subsection : prove that in the case that $n$ is even than we have stron inequality Given this HTML:  &lt;div&gt;foo&lt;/div&gt;&lt;div&gt;bar&lt;/div&gt;&lt;div&gt;baz&lt;/div&gt;   How do you make them display inline like this:     foo bar baz   not like this:     foo   bar   baz Applying for a Canadian ETA after previous visits without one Page number in title page Can I have two Schengen visas in one passport? The new top bar layout is fine, but the black color is very visually jarring/intrusive.  Is using a lighter color an available option? Disable OS X startup sound How can I permanently disable the startup sound (or chime) in Yosemite?  (I am using a late-2014 13" macbook pro)  I already tried several options found here and there :    installed StartNinja.app => did not work installed Auto-Mute.app  => did not work tried to install the old StartupSound prefPane => did not work tried the command "sudo nvram SystemAudioVolume=%80" => volume does not change (I also tried other values than 80, such as 00, 01, or nothing)   NOTE: I know that it is possible to mute the next startup sound by turning the volume down, but this is not a permanent solution. Infinite product with sign changes. For infinite products I know the following theorems:  Theorem I. If $a_n \geq 0$ for all $n$ then $\prod (1+a_n)$ converges if and only if $\sum a_n$ converges.  Theorem II. If $-1 &lt; a_n \leq 0$ for all $n$ then $\prod (1+a_n)$ converges if and only if $\sum a_n$ converges.  My question is what are necessary and sufficient conditions (possibly including more restrictions than in I and II) for $\prod (1+a_n)$ convergence/divergence as related to  $\sum a_n$ convergence/divergence  if the sequence of terms $a_n$ can switch signs repeatedly but always stay greater than $-1$.  I already know the trivial equivalence of $\prod(1+a_n)$ and $\sum\ln(1+a_n)$. How do I appropriately examine the dimensionality of binary data? I have 72 binary variables and, at a theoretical level, I am trying to identify groups of variables that seem to vary together. In practice, I am struggling with how to analyze this data properly. I am using R and the psych package. Here is what I have tried and what the outcomes were:  Estimated a tetrachoric correlation matrix (ran without problem) Estimated MSA (relatively strong values, ran without problem) Ran parallel analysis to identify how many factors to extract (ran without problem) EFA using fa() to estimate factors (non-positive definite matrix and strangely high RMSEA) Tried different factor counts, smoothing/unsmoothing, estimation methods, rotations methods, and removing variables (problems persisted) Tried to focus instead on eBIC (always returned as NULL in output) EFA using (inappropriately) Pearson correlations (RMSEA behaved)  From looking at other questions and answers on here, I am now aware that tetrachoric matrices can be problematic like this. However, I don't know what to do with that information. Accept the problems as a limitation and move forward? Conduct a different type of analysis? I considered IRT as is recommended, but am unaware of an exploratory way to conduct IRT analyses. I understand that most of my options are imperfect. My goal is to find an analysis that is at least arguably appropriate for binary variables and that will inform the ways in which I group these variables in my theorizing. Given this, my questions are:  Can I trust EFA on a tetrachoric matrix despite problematic output? Can I somehow recover the lost eBIC value and use that? Is exploratory IRT possible/desirable? Are there other analyses, in R, that can be used to examine the dimensionality of binary data?  I appreciate all feedback! I love learning about data analysis and hearing about how I can improve.