Displaying road outlines but not segments i.e. no lines at intersections?
How to hide "internal" polygon boundaries?
What are bitwise operators? I'm someone who writes code just for fun and haven't really delved into it in either an academic or professional setting, so stuff like these bitwise operators really escapes me.  I was reading an article about JavaScript, which apparently supports bitwise operations. I keep seeing this operation mentioned in places, and I've tried reading about to figure out what exactly it is, but I just don't seem to get it at all. So what are they? Clear examples would be great! :D  Just a few more questions - what are some practical applications of bitwise operations? When might you use them? NULL values inside NOT IN clause This issue came up when I got different records counts for what I thought were identical queries one using a not in where constraint and the other a left join. The table in the not in constraint had one null value (bad data) which caused that query to return a count of 0 records. I sort of understand why but I could use some help fully grasping the concept.  To state it simply, why does query A return a result but B doesn't?  A: select 'true' where 3 in (1, 2, 3, null) B: select 'true' where 3 not in (1, 2, null)   This was on SQL Server 2005. I also found that calling set ansi_nulls off causes B to return a result. Need to get logfile smaller Im trying to get my head around complex integration/complex line integrals. Real integration can be thought of as the area under a curve or the opposite of differentiation. Thinking of it geometrically as the area under a curve or the volume under a surface in 3 dimension is very intuitive.   So is there a geometric way of thinking about complex integration? Or should I just be viewing it as process that reverses differentiation? Or has integration other meanings in complex analysis? Here is an example, could someone explain this to me - Here's the definition of the integral along a curve gamma in C, parameterized by $w:[a, b] -&gt;C$ \begin{equation} \int_\gamma f(z)dz = \int_a^b f(w(t)).w{(t)}'dt \end{equation}   So I have -  $\gamma$ is the unit circle with anti-clockwise orientation parameterized by  $w:[0, 2\pi]\to C$  $w(t) = e ^{it} = Cos(t) + iSin(t)$  So if use the definition of the integral,   $\int_\gamma f(z)dz = \int^b_a f(w(t)).w{(t)}&#39;dt$,  and work this out it comes to  $\int^{2\pi}_0 i dt = 2{\pi}i$  So what does this $2{\pi}i$ represent? Does it mean anything geometrically, like if a regular integral works out to be 10 that means the area under the curve between 2 points is 10... "'void' type not allowed here" error (Java) Calculating latitude and longitude of points using QGIS How do I easily calculate the lat/long of points using the QGIS Field Calculator? I saw a previous related question (), but it deals with a more advanced approach. In ArcGIS Desktop this is similar to the Calculate Geometry function; I just can't find where do this in QGIS. How to use "grep" command to find text including subdirectories I want to find all files which contain a specific string of text. The grep command works, but I don't know how to use it for every directory (I can only do it for my current directory). I tried reading man grep, but it didn't yield any help. How can I use BibTeX to cite a web page? I'm looking to cite a number of web pages using bibtex and I was wondering if there was a specific template of the form @&lt;template name here&gt; for doing that. If you could use the following website as an example that would be great Why doesn't the UK ask for travel bookings for a tourist visitor visa? How to loop through a HashMap in JSP? Issue with using ContactID as subscriber key in Marketing Cloud We have set up our Sales Cloud - Marketing Cloud integration where Contact ID is used as the subscriber key.  What we've noticed is when we have contact ID as the subscriber relationship on our sendable data extension, Marketing Cloud will reference contact ID on All Subscribers list and if data matches, it will send to the email address listed on All Subscribers and not to the one on the data extension.  This has caused us headaches for a number of reasons:   Email addresses always change so the one on All Subscribers is out-of-date. Whilst preference center can update a recipients address and write this back to All Subscribers that not how most addresses are updated by the user Email address is typically updated in Sales Cloud instance and migrated to Marketing Cloud either through imports or via synchronized data extensions.  It does not map directly to All Subscribers. Marketing Cloud users assume (and quite rightly) the address listed on the data extension is what will be used in the send. Not the one on All subscribers.   Anyone else experienced this? Any solution to resolve this issue? We are supposed to prove that the zero vector is unique with the additive identity $x+O=x$ and then by creating another additive identity with $O'$, then $x+O'=x$.  We set them equal $x+O=x+O'$ and use the vector cancelling theorem to get $O=O'$, but how does this prove that the zero vector is unique? Quick question about curly braces not showing up Ii am writing a short code, so I doubt anything else in the code is causing the problem. This is the problematic line of code:  \[ M_R := \max {|f(z)|: |z - z_0| = R }\le M\]   It doesn't show the curly braces. I've tried using \left{ and \right} but to no avail.  What should I do?  Thank you Firstly, how do you gain the score exactly? I know it shows in the bar on the side of the map, but I remember a match where I was lone-wolfing and still got a pretty high score in that bar. I suppose my other squad members were together, but do I also gain for their work?  Also, does the score reset when I start a new game? I mean, I play support with the Offensive perk and it took me a long game of conquest to just unlock lvl-3 extra grenade. In the next match, that 'nade is gone. Don't I keep it forever? The Public Platform team is continuing to work towards  and we’re here today to announce a new onboarding experience for the review queues. In the  (), we learned that each queues’ instructions could be easily misinterpreted and additional information was difficult to find. Without proper guidance or context, new reviewers would contribute inconsistent reviews and risk having their review privileges suspended. With this release, our goals were to 1) better highlight the review privilege and 2) provide upfront instruction and guidance for successful reviewing. New privilege announcements Community moderation is a significant aspect of Stack Overflow and the Stack Exchange sites. We want users to be aware and familiar with this newly earned privilege, but also celebrate the opportunity to contribute to the community in a unique way.  Many users were discovering the review queues by chance. Once the privilege is earned, a new review queue icon with a red alert would appear in the top-right part of the navigation. We are adding a popover to bring more attention to this easy-to-miss icon. We will also be adding notices for when users earn access to other, higher reputation queues. Additionally, new reviewers will also receive an email notification about the newly earned privilege. They will only get the email if they earn the privilege and don't perform a review within 24 hours (anyone who doesn't want to receive email notifications like this can visit their  and turn off &quot;Tips and Reminders&quot;). We are also showing a popover to users who earned access to review queues in the past, but have never done a review or haven't reviewed in the last 30 days. This popover is only appearing for the next 90 days. The goal is to engage users who may not have interacted with the queues since we made  and . Welcome banner  If a reviewer clicks “Learn more” on the on-page popover or goes to the review queue home page (/review), they’ll be greeted with an onboarding message with general information about the review queues. Informational modals  Queue-specific modals will appear upon page load as you visit each queue. They summarize and highlight important aspects and tips about reviewing in a particular queue. This information can be revisited at any time by clicking “Learn more” under the page header. Feedback As always, please leave your feedback and any bugs you may discover related to this release below this post. We will be monitoring this post for the next few weeks (May 4, 2021). After May 4th, please report any further issues as new questions. How to restore file copy / transfer status window? Prove that $(x^2 + x+2)$ ideal is a maximal ideal in $F_3[x]$ ring.  I know the theorem about factor rings and fields     B ideal from A ring is maximal iff A/B factor-ring is a field   How can I use the theorem here? How can I calculate the angle and proper turn direction between two 2D vectors? I am working on some movement AI where there are no obstacles and movement is restricted to the XY plane. I am calculating two vectors, v, the facing direction of ship 1, and w, the vector pointing from the position of ship 1 to ship 2.  I am then calculating the angle between these two vectors using the formula  arccos((v · w) / (|v| · |w|))   The problem I'm having is that arccos only returns values between 0° and 180°.  This makes it impossible to determine whether I should turn left or right to face the other ship.  Is there a better way to do this? PHP PCRE (regex) doesn't support UTF-8? Does Perl have PHP-like dynamic variables?