this is my apex class for scheduling to run every 30 min.but when i scheduled in salesforce it will run after one hour but i need to run my scheduled class for every 30 mins.anyone help me to gohead  this is my scheduled class :  global class SchedulingService implements Schedulable {     global void execute(SchedulableContext SC){       ServiceNowUpsert.GetIncident('xxxxx','xxxxx','xxxxx');                 String day = string.valueOf(system.now().day());       String month = string.valueOf(system.now().month());       String hour = string.valueOf(system.now().hour());       String minute = string.valueOf(system.now().minute() + 30);       String second = string.valueOf(system.now().second());       String year = string.valueOf(system.now().year());        String strJobName = 'Job-' + second + '_' + minute + '_' + hour + '_' + day + '_' + month + '_' + year;       String strSchedule = '0 ' + minute + ' ' + hour + ' ' + day + ' ' + month + ' ?' + ' ' + year;       System.schedule(strJobName, strSchedule, new SchedulingService());        } }   Thanks
Using the salesforce GUI it seams impossible to schedule a job every 15 minutes. Or more than once a day.
"Its" as a Possessive Pronoun Bounded in Probability and smaller order in probability Placement of images in row using subfigure I want to put four figures in a single row. The code I am trying to use is taken from .  This puts three figures in a row. When I add a fourth one, I get three images in row and the last one appears in the second row. But I want all of them in one row. Here is my code.  \documentclass[12pt,twoside]{report}% Use this line for the print version of the thesis   \usepackage{graphicx} \usepackage{caption} \usepackage{subcaption} \begin{document}  \begin{figure}         \centering         \begin{subfigure}[b]{0.3\textwidth}                 \centering                 \includegraphics[width=\textwidth]{gull}                 \caption{A gull}                 \label{fig:gull}         \end{subfigure}%           \begin{subfigure}[b]{0.3\textwidth}                 \centering                 \includegraphics[width=\textwidth]{gull}                 \caption{A gull2}                 \label{fig:gull2}         \end{subfigure}%          ~ %add desired spacing between images, e. g. ~, \quad, \qquad etc.           %(or a blank line to force the subfigure onto a new line)         \begin{subfigure}[b]{0.3\textwidth}                 \centering                 \includegraphics[width=\textwidth]{tiger}                 \caption{A tiger}                 \label{fig:tiger}         \end{subfigure}         ~ %add desired spacing between images, e. g. ~, \quad, \qquad etc.           %(or a blank line to force the subfigure onto a new line)         \begin{subfigure}[b]{0.3\textwidth}                 \centering                 \includegraphics[width=\textwidth]{mouse}                 \caption{A mouse}                 \label{fig:mouse}         \end{subfigure}         \caption{Pictures of animals}\label{fig:animals} \end{figure} \end{document}   As I have mentioned above, it works for three figures.  But I can not use it for four figures. What should I change?   What does  width=\textwidth mean?   I changed    \begin{subfigure}[b]{0.3\textwidth}   to  \begin{subfigure}[b]{0.2\textwidth}   but it didn't help.  Then, I changed     \includegraphics[width=\textwidth]{mouse}   to  \includegraphics[width=0.5\textwidth]{mouse}   Still no solution. "This is a favorite question" tooltip when not favorite When viewing a question, when I hover over the star icon (under the voting module) the tooltip says I've made it a favorite when I haven't yet. Ubuntu 17.10 Upgrade Broke VMWare Workstation 12.5 Hi after upgrading to Ubuntu 17.10, vmware is now not starting.    I get the message:    /usr/lib/vmware/bin/vmware-modconfig: Relink `/lib/x86_64-linux-gnu/libbsd.so.0' with `/lib/x86_64-linux-gnu/librt.so.1' for IFUNC symbol `clock_gettime'   I am aware that there are patches available and I am attempting to apply these and recompile. I have run from the solution at :    cd ~   #Copy the vmmon source tar ball to your temporary location cp /usr/lib/vmware/modules/source/vmmon.tar .    #Extract the tar ball tar xf vmmon.tar    #Download the modified file that mkubecek posted and overwrite the one from the tar ball for VMware Workstation 12.5: wget -O ./vmmon-only/linux/hostif.c https://raw.githubusercontent.com/mkubecek/vmware-host-modules/b50848c985f1a6c0a341187346d77f0119d0a835/vmmon-only/linux/hostif.c     #Wrap up the newly modified files into a tar ball replacing the original one sudo tar cf /usr/lib/vmware/modules/source/vmmon.tar vmmon-only    #Rebuild the VMware kernel modules sudo vmware-modconfig --console --install-all   Failed to get gcc information.  gcc --version gcc (Ubuntu 7.2.0-8ubuntu3) 7.2.0 ...   Unforunately, vmware-modconfig is failing because of a dependency it seems on a particular gcc version. Am I on the right track? Any help with this issue would be much appreciated.  EDIT Thank you Steve, the below has gotten vmware going again. I've included minor correction. Tested and confirmed I could run a virtual machine.   sudo su    # do all below as root cd /usr/lib/vmware/modules/source tar xvf vmmon.tar  tar xvf vmnet.tar wget -O ./vmmon-only/linux/hostif.c https://raw.githubusercontent.com/mkubecek/vmware-host-modules/b50848c985f1a6c0a341187346d77f0119d0a835/vmmon-only/linux/hostif.c vim vmnet-only/bridge.c cd vmmon-only/ make cd ../vmnet-only/ make cd .. mkdir /lib/modules/4.13.0-16-generic/misc cp *.o /lib/modules/4.13.0-16-generic/misc insmod /lib/modules/4.13.0-16-generic/misc/vmmon.o insmod /lib/modules/4.13.0-16-generic/misc/vmnet.o rm /usr/lib/vmware/lib/libz.so.1/libz.so.1 ln -s /lib/x86_64-linux-gnu/libz.so.1 /usr/lib/vmware/lib/libz.so.1/libz.so.1 vmware-networks --start exit  # run vmware as normal user /usr/lib/vmware/bin/vmware I often hear about the wave-particle duality, and how particles exhibit properties of both particles and waves. However, I wonder, is this actually a duality? At the most fundamental level, we 'know' that everything is made up out of particles, whether those are photons, electrons, or maybe even strings. That light for example, also shows wave-like properties, why does that even matter? Don't we know that everything is made up of particles? In other words, wasn't Young wrong and Newton right, instead of them both being right? Google Analytics configuration setting for Drupal multisite (domain and submain) I am working on a Drupal mulsite project (using single database) and using Google Analytics module for this.  I have follow the below steps for GA configuration:   Created a domain name example1.com and a sub-domain name example2.com. Create an account on GA and create property for both of this domain name in GA account. Both property give me two different Tracking ID (same as below screenshot).      Into the configuration setting of GA from drupal admin section I have added Web Property ID of example1.com and into domain setting added both the domain name example1.com and example2.com into the section of List of top-level domains (a same as attached screenshot).      Now this configuration is only working for emample1.com, not for example2.com. So can anyone please tell me how can I use Web Property ID of domain exmaple2.php to get the result? I'm writing a web app using Twitter Bootstrap with PHP on server side. My app makes regular ajax requests via jQuery and i want to disable certain parts of the UI until the server completes processing and hands back the control to Client-Side.  I wonder what would be best practices for the same? Difference between projection and datum? How can I make a div not larger than its contents? I have a layout similar to:  &lt;div&gt;     &lt;table&gt;     &lt;/table&gt; &lt;/div&gt;   I would like for the div to only expand to as wide as my table becomes. "As a beginner, I am happy that I learned a new thing."  You will recognize this as your DoReMi-s.( at 4:52)  What is the meaning of the "AS" there and when do we use that?  In depth answers would be appreciated.  Similarly:     Do I have your word as a lawman not to shoot me down like a dog in the street?    Can you explain this sentence?   Can I understand it as a lawman wouldn't shoot down people on the street or wouldn't have his word or what? I am very new to cryptography (so be kind), but I have a question that may seem silly.   If the one-time pad is the perfect cipher and impossible to crack, why would the following algorithm not be one of the strongest:  To encrypt:   generate a random bit array using a pseudo number generator with the key as the seed  The generated bit array is the size of the data use a simple XOR to encrypt using the generated bit array   To decrypt:   pseudo-random number generator will generate the same bit array with the same seed (the key) generate bit array the same size of the encrypted data run XOR on encrypted data using bit array that's generated   This is very simplified, but you can imagine how for larger encryption you could break down the data into blocks, and in order to ensure that the block bit arrays are random a new seed for each can be derived from the key. So, if $f(k)$ is the pseudo random number generator, and b is the block number, you can encrypt each block with $f(k+b)$. ($k$ is key)   Instead of using a pseudo-random number generator, you could use some hash algorithm to generate the pad.    (assuming you can use equivalently strong keys) would this not be a very strong cipher method? Perhaps it may be strong and heavy on memory since the pad needs to be the size of the data. So during encryption and decryption you need to generate a pad that's equivalent to the size of the data.   Is there a flaw in this algorithm, or would something like this not be practical and much slower than current standards? I'm totally new to Ubuntu/Linux, using Ubuntu Server at the moment. Just trying to  figure out something basic.   How can you tell where you are installing a program. For example I just installed Sphinx search engine by placing the tarball that I downloaded from their site to my:  /home/sphinx   directory. I created the sphinx directory to place that tarball in. Then I ran these commands:  tar xvzf sphinx-0.9.8.1.tar.gz cd sphinx-0.9.8.1/ ./configure --with-mysql-includes=/usr/include/mysql --with-mysql-libs=/usr/lib/mysql   and then these:  make sudo make install   Now I have a lot of files sitting in the directory where I ran these commands. Is this my Spynx installation or did it install somewhere else?  In windows if you run an installer (.exe file) anywhere the program will still install in your C:\Program Files directory. Does something similar apply to linux where all programs are installed in a central place, or can you install programs anywhere on the system.  Questions   I would prefer to keep all my installed programs in one place so what is the right place for this in terms of best practice. In other words what is the Linux equivalent of C:\Program Files? And how does one always install at this location, is it just a matter of placing the tarball and running the install commands from this location? What about if I use sudo apt-get to install a package. How can I point to this location to tell apt-get to always install there? Technically, NULL = NULL is False, by that logic no NULL is equal to any NULL and all NULLs are distinct. Shouldnt this imply that all NULLs are unique and a unique index should allow any number of NULLs? How can I check if a directory exists in a Bash shell script? What command can be used to check if a directory exists or not, within a Bash shell script? Why does my Nikon D3100 give the error "Lens not attached" with a Vivitar 200 telephoto lens? Consider these two ways of coining a name: 1) Bolzano's theorem, Rolle's theorem 2) the Poincare conjecture, the Kantorovich theorem. What is the difference between these ways, why do people choose one over the other?  My guess is that the main difference is when you put 's at the end of a name, you strictly imply that the theorem/conjecture was written by this very person (Bolzano wrote Bolzano's theorem). But when it is "the [Name] theorem/conjecture," it doesn't mean that the person which name is used actually created this thing, maybe he just inspired it (Poincare might have only inspired the Poincare conjecture but did not propose it).  Sometimes there is only one way: ; you can not call it hairy ball's theorem. Every Window in Windows 8 got this icon if it gots the focus. When clicking on it, nothing seems to happen.   How does this icon work? I refer to the usage of "don't" as an imperative to tell someone what not to do. As in,     Hey! Don't you dare touch that button!   When it is used in the interrogative or as part of a statement, "don't" can be expanded like most other contractions. It either just breaks up right in the sentence, or surrounds the subject.     Don't you love me, Juanromeo? -> Do you not love me, Juanromeo?      I don't love you, Marijuliet. -> I do not love you, Marijuliet.   However, I have no idea how one breaks up the imperative. "Do you not dare[...]" sounds like it's a lead up to a question, "You do not dare[...]" comes across as a statement moreso than a command, and "Do not you dare[...]" just sounds silly.  "Don't" is a bit unique among "not" contractions (at least that I know of) because it is the only one that can be used in an imperative sense. Couldn't, shouldn't, wouldn't, haven't, isn't, doesn't, aren't, can't... none of these can be used in an imperative sense because you cannot command someone to could, should, etc.  Is it possible to expand the don't contraction when it is used as part of a command? Or is its unique case such that it exists as its own linguistic construct? How long do Tenacious and Unsung Hero badges take to be awarded? Just curious whether the process takes a while, and whether it scrapes through history to determine if it was once valid or not. Currently, I have 6 0-vote accepted answers and 20 1+-vote answers (), and that makes it > 5 and > 20% but not for long if voting goes up or down from here. ;-P  Update:  Special thanks to Grace Note for pointing out the  to follow. I upgraded this to a bug because it's been 48 hours during which the criteria supposedly were met. 6 0-votes, 20-23 1+ votes during the whole period. The criteria only last so long, so it may go out of scope soon. If it only checks every 3 days, I'm not sure if that's intentional or a bug.