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Add/Delete table rows dynamically using JavaScript Is there a way to disable the hotkeys? I have studied that  and motional emf are two different lines of thinking but are essentially same. But then, how can Faraday's paradox be explained by Faraday's law of induction? Particularly in paradoxes in which Faraday's law of induction predicts zero EMF but there is a non-zero . The wikipedia article is more confusing rather than enlightening.  I need an explanation regarding  EDIT : I wanted to know how is flux changing if faraday's law is valid . Why are the domains for $\ln x^2$ and $2\ln x$ different? Inequality $\frac{1}{n+1}+\frac{1}{n+2}+...+\frac{1}{3n+1} \ge 1$ Server 2012 deduplication: run on Hyper-V host or guest VM? I have a Windows Server 2012 Hyper-V host with VMs on a dedicated RAID-5 volume. One VM is also running Server 2012 and is being used to serve files. The other VMs are smaller and mostly used for temporary testing scenarios.   The main file server VM has two dynamically expanding VHDX files - one for the OS and one for storage. The VHDX being used for storage has quite a few duplicated files on it.  Should I run Server 2012 deduplication on the volume containing the storage VHDX file on the host, or within the file server VM itself? I understand that running it within the VM will not decrease the size of the VHDX file on the host, but my goal is to enable as much storage capacity within the VHDX file itself. I also understand that if I run it on the host, I will have to take the VM offline to do it. Downtime isn't a concern in this instance, just the best way to do this. Let $F$ be a finite field. How do I prove that the order of $F$ is always of order $p^n$ where $p$ is prime? I remember being taught that the correct order of adjectives in English was something along the lines of "Opinion-Size-Age-Color-Material-Purpose."  However, it's been a long time and I'm pretty sure I've forgotten a few categories (I think there were eight or nine). Can anyone fill them in? Using Regular Expressions to Extract a Value in Java I have several strings in the rough form:  [some text] [some number] [some more text]   I want to extract the text in [some number] using the Java Regex classes.  I know roughly what regular expression I want to use (though all suggestions are welcome). What I'm really interested in are the Java calls to take the regex string and use it on the source data to produce the value of [some number].  EDIT: I should add that I'm only interested in a single [some number] (basically, the first instance). The source strings are short and I'm not going to be looking for multiple occurrences of [some number]. Digitally selectable filter I have asked a  but I did not get an answer, as it was too specific. So I will build on it but make it a bit more broad spectrum.  I would like to make a digitally selectable BPF using transistors to select a component in the filter; resulting in the center frequency being changed.  I have used FilterPro to generate quick second order filters and get a rough filter response.  For all the designs, a Multiple-feedback was selected:  In the first picture, a center frequency at 108KHz with a bandwidth @ -3dB of 103K to 113KHz is given.    For the second, a center frequency at 117.5KHz with a bandwidth @ -3dB of 112.8K to 122.2KHz is given.    The only difference between these two circuits is R3.  If I were to implement a circuit as shown below, would it work and what transistor would be recommended? I have selected the  as the Opamp in the circuit design as that is what was used for the .    For the transistors, I was thinking of using the MOSFETs (2N7002) used in the ST7590 design as well. I'm using the plugin  which registers it's own post type but the capability is assigned to "post".   I want to change it to "manage_options".  Is there a correct way without altering the plugin to do that? Calling a hook, a function or whatever?   public function register_post_type() {      $labels = array (         'name'               =&gt; _x( 'Custom Code', 'post type general name' ),         'singular_name'      =&gt; _x( 'Custom Code', 'post type singular name' ),         'menu_name'          =&gt; _x( 'Custom CSS &amp; JS', 'admin menu' ),         'name_admin_bar'     =&gt; _x( 'Custom Code', 'add new on admin bar' ),         'add_new'            =&gt; _x( 'Add Custom Code', 'add new' ),         'add_new_item'       =&gt; __( 'Add Custom Code' ),         'new_item'           =&gt; __( 'New Custom Code' ),         'edit_item'          =&gt; __( 'Edit Custom Code' ),         'view_item'          =&gt; __( 'View Custom Code' ),         'all_items'          =&gt; __( 'All Custom Code' ),         'search_items'       =&gt; __( 'Search Custom Code' ),         'parent_item_colon'  =&gt; __( 'Parent Custom Code:' ),         'not_found'          =&gt; __( 'No Custom Code found.' ),         'not_found_in_trash' =&gt; __( 'No Custom Code found in Trash.' ),     );     $args   = array (         'labels'              =&gt; $labels,         'description'         =&gt; __( 'Custom CSS and JS code' ),         'public'              =&gt; false,         'publicly_queryable'  =&gt; false,         'show_ui'             =&gt; true,         'show_in_menu'        =&gt; true,         'menu_position'       =&gt; 100,         'menu_icon'           =&gt; 'dashicons-plus-alt',         'query_var'           =&gt; false,         'rewrite'             =&gt; array ( 'slug' =&gt; 'custom-css-js' ),         'capability_type'     =&gt; 'post', // &lt;--- I want to manipulate this         'has_archive'         =&gt; true,         'hierarchical'        =&gt; false,         'exclude_from_search' =&gt; true,         'menu_position'       =&gt; null,         'can_export'          =&gt; false,         'supports'            =&gt; array ( 'title' ),     );      register_post_type( 'custom-css-js', $args ); }   The above code is in custom-css-js.php lines 200-239. Toggle wireframe mode with hotkey solving diophantine equations using congruences So, a question in Elementary Number Theory by David M. Burton:     Problems 4.4      2(a) Using congruences, solve the diophantine equation 4x + 51y = 9       Hint: $4x \equiv 9(mod \ 51) $ gives $ x = 15 +51t$, whereas $ \ 51y \equiv 9 (mod \ 4)$ gives $y = 3+4s $. Find the relation between $s$ and $t$ From this hint, I substitute $ x = 15 +51t$ and $y = 3+4s$ in the given equation $4x + 51y = 9$ to get the relation $s = -t-1$ and using which I can get the solutions $ x = 15 + 51t, \ y =-1-4t$ But we know that the solutions of $ax \equiv b (mod \ n)$ is equivatent to the solutions of the diophantine equation $ax -ny = b$, so, solutions of $4x \equiv 9(mod \ 51) $ is equivalent to solutions of the equation $4x-51y=9$ whereas, solutions of $51y \equiv 9(mod \ 4) $ is equivalent to solutions of the equation $-4x+51y=9$ Now, my question is: as, the above equations $4x-51y=9$ and $-4x+51y=9$ are different, then what is the point of substituting $ x = 15 +51t$ (solution of $4x-51y=9$) and $y = 3+4s $ (solution of $-4x+51y=9$) in the given equation $4x+51y=9$ to find a relation between $t$ and $s$ ? Isn't it absurd as $ x = 15 +51t$ and $y = 3+4s $ are solutions of two different equations? Can anyone please explain this? PS: I did it like this $4x \equiv 9(mod \ 51) $ gives $ x = 15 +51t$ and by substituting it in $4x+51y=9$ we get $y=-1-4t$ <50 reputation users can't delete comments that were posted on their behalf Some preface: I have an alternate account that I'm using to gain rep in order to help test/build bots for the  community on stackoverflow. Bot accounts are essentially users, and they need 20 rep to talk in chat, and 50 in order to add comments.  On this account (with 23 rep), I flagged a question as a duplicate of the wrong post by accident:        When I retracted the duplicate flag, I noticed that the comment was not removed. When I attempted to remove it, there was no [x] icon to the right of the post, and I had no recourse other than to leave the comment up (Which was 100% a wrong duplicate for that post). Additionally, I couldn't even flag it for mod attention, because it was my comment! Is a Schengen visa/transit visa required for a transit flight through two Schengen airports? Changing default width of blocks in beamer I use a custom Beamer theme for my presentations. In my presentations I'd like to use blocks (\begin{block}…\end{block}). These blocks are rendered slightly too wide to fit into my theme. Is there a way how I can set the default width of blocks, e.g. to .9\textwidth? How to prove that the set $A = \left\{ {p:{p^2} < 2,p \in {\Bbb Q^+}} \right\}$ has no greatest element? More specifically, I have to find a $q$ in $A$ such that $q$ is larger than any $p$ in $A$.  The only thing I can think of is using (${2 - {p^2}}$) somehow, or ${(p+x)^2}&lt;2$, but other than that I don't know how to proceed. This exercise is taken from the very first chapter of Walter Rudin's Principles of Mathematical Analysis. Quoting the exercise:     To do this, we associate with each rational $p &gt; 0$ the number:     $$q = p - \frac{{{p^2} - 2}}{{p + 2}} = \frac{{2p + 2}}{{p + 2}}$$   But he didn't explain how he came up with that number.   The only thing I've thought of is the following procedure:  $$\eqalign{   &amp; {p^2} + (2 - {p^2}) = 2 \Rightarrow {p^2} + (\frac{{2 - {p^2}}}{2}) &lt; 2,{\text{ and since }}2 - {p^2}{\text{ is always positive,}}  \cr    &amp; {p^2} &lt; \left[ {{p^2} + (\frac{{2 - {p^2}}}{2})} \right] &lt; 2  \cr    &amp; {\text{Therefore, let }}q = \sqrt {{p^2} + (\frac{{2 - {p^2}}}{2})} ,{\text{ then:}}  \cr    &amp; p &lt; q &lt; \sqrt 2  \cr} $$  However, my result doesn't necessarily belong to ${\Bbb Q}$. I wonder how did he obtain the value of $q$ in the book.  EDIT: Feel free to point out if there are more appropriate tags for this question. Proof of uniform limit of Continuous Functions The uniform limit of Continuous Functions is continuous.   Proof Let $\varepsilon &gt; 0$. There exists $N$ in natural numbers such that $n&gt;N$ implies  $|f_n(x)-f(x)| &lt; \frac{\varepsilon}{3}$ for all $x$ in $S$. In particular $|f_{N+1}(x)-f(x)| &lt; \frac{\varepsilon}{3}$ for all $x$ in $S$. Since $f_{N+1}$ is continuous at $x_0$ there is a $\delta&gt;0$ such that, $x$ in $S$ and $|x-x_0| &lt; \delta$ imply $|f_{N+1}(x)-f_{N+1}(x_0)|&lt; \frac{\varepsilon}{3}$ Now we conclude $x$ in $S$ and $|x-x_0| &lt; \delta$ imply $|f(x)-f(x_0)|&lt; 3 \cdot \frac{\varepsilon}{3} = \varepsilon$.  Can someone explain what is happening here? I don't follow it all. Why can't I associate files with Excel after upgrading to 2010? I am young, just started my career, and looking to begin investing so I can make my money work for me. I'm still living like I did in college (occasional purchase on myself, but most of it goes into savings) and I would like to take the extra money and invest it.   What would you suggest are the best options for me to begin? I was considering getting a personal investor [a financial advisor] for perhaps a year or so, but I've heard that they really are not worth the money. I wanted to get the input of the great minds here.