I am trying to use the std::rename() function to move a .docx file, however, the name of the file may vary. How can I use a std::string within std::rename() so that it does not have to be a hardcoded filepath, like this std::rename(filepath, destination);?
How can I convert an std::string to a char* or a const char*?
What happens if both players die simultaneously? If both players are very low health and someone plays this card:    Both players could die simultaneously. What happens in Arena when this event occurs? Does it count as a loss for both players? Does it count at all for your Arena record?  Side note: Holy Nova + Auchenai Soulpriest could cause the same scenario. MacTeX - TeX Live Utility broken after 2015 update IS or ARE? "The only thing that I want you to hit right now IS/ARE the books" My java code has an obvious error. Why does it compile and run? Why shouldn't we allow NULLs? I remember reading this one article about database design and I also remember it said you should have field properties of NOT NULL.  I don't remember why this was the case though.  All I can seem to think of is that, as an application developer, you wouldn't have to test for NULL and a possible nonexistent data value (for instance, an empty string for strings).  But what do you do in the case of dates, datetime, and time (SQL Server 2008)?  You'd have to use some historic or bottomed-out date.  Any ideas on this? Limits of sequences of sets I am starting to learn about the liminf and limsup of a sequence of sets. However, I do not understand the very basics, such as why $\lim\sup A_n=\bigcap_{n\in N}\bigcup_{k&gt;n} A_k,$ and why $\lim\sup A_n=\bigcup_{n\in N}\bigcap_{k&gt;n}A_k.$ Can someone break these definitions down for me?  Also, why is $\lim\inf\subseteq\lim\sup$? Title does not specify "On Hold" Testing the app, I noticed the title does not specify if a question is "On Hold" ... I haven't checked specifically, but would assume it doesn't specify as "Duplicate" either ... Or am I missing it somewhere? Is it not in the title but located/displayed some other way? If it is, this could be very confusing to users. If it isn't there, it's definitely confusing to users :-)  Using: Version 1.0.1.125 on iPad3 with iOS8 Fixed buffers and interior buffers are not working for a polygon that contains a hole I'm following the online qgis manual available on qgis website. I'm doing the step 21.11.3. ().   To make it simple : I have a raster converted to vector, so now it is a polygon (several polygons). I'm doing an interior buffer exactly how it is described in the manual. I didn't obtain the same result. I can see the interior buffer just in some polygons, not in all of them ->    The interior buffers appear just for those polygons, that don't contain a hole. I use qgis 2.18.3.  This is how i created the interior buffer ->    In green you see the input layer : suitable_terrain, in blue the output layer, the interior buffer.   It is not a problem of a projection. I use WGS84 UTM Zone 34S where the units are in meters. I did also the Check validity and i obtain the same result. ibus Avro in Ubuntu 14.04 LTS Scenario description  Lets assume both containers have a capacity of 300 litres.  One is a vertical tube  as shown in pic 1  Other one is more or less a V shaped containers as shown in pic 2  Both are at ground level  Question  No doubt that whole weight of 300 litres will act on the base of the tube (pic 1). But will the weight of the whole 300 litres act on the base of the container as shown in pic 2?  I.e if you keep both the containers on a weighing scale, for sure, it will show a weight of approx. 300 kg each.  But what I'm asking is whether the weight of whole 300 litres acts on the base of container 2 (since the container's walls are slanting, as opposed to the walls of the tube in pic 1).  If the whole weight will not act on the base of the container, can you state the reasoning and also the principle, so that I can further get to know about it?  Pic 1             |         |                    |         |            |         |            |         |            |         |            |         |            |_________|   Pic 2           \              /           \            /            \          /             \________/ Dealing with "Find out who's going to buy the croissants" On Stack Overflow at the moment, there is a popular question which is currently high in the Hot Questions feed:   So far it has been closed twice (once by the community and a moderator and once by a moderator alone) but re-opened twice by the community. It is clearly not a [so] Stack Overflow question. Reading between the lines, there could be a valid Software Engineering question there, but it would be a very basic one (at the fizz-buzz competency level) and looks more like a populist attempt to farm reputation than a serious question.  Worst of all, even though there are some interesting answers on this question, they are all going to be completely useless to future visitors to the site, since they will be completely undiscoverable. If the question were at least "What is the best fair distribution algorithm?" it would still be off-topic (primarily opinion based), but at least it might help someone once the topic falls off the Hot Questions feed.  Although this has turned into just a bit of fun, and I don't want to kill that, enough is enough. While this question is open, unlocked, and still seen as a valid question, it is setting a bad example for the whole Stack Exchange network.   questions like this, especially on the grandfather Stack Exchange site, devalue the work we are putting in on every other site by making it appear acceptable to re-open populist questions like this after two moderators have classified it as off-topic.  What should we do about this question?   Should it be left open? Power to the people? Closed and locked by a moderator? Migrated to another site? &hellip;or something else? NOTE: I would appreciate it if you provided a hint and not the whole solution.  BdMO 2014 Nationals:     In acute angled triangle ABC, considering a portion of side BC as diameter a    circle is drawn whose radius is 18 units and it touches AB and AC side. Similarly,    considering a portion of sides AC and AB as diameters, two other circles are    drawn whose radii are 6 and 9 units respectively. What is the radius of the incircle    of ∆ABC?   The main problem with this  problem is that the figure is incredibly messy.So I drew one circle,and tried getting information from it.I noticed that if $O$ is a centre of one of the above (semi)circles,and if $O$ is located on $AB$, then $CO$ is an angle bisector.Therefore,if we connect all the vertices with the centres,their intersection would be the incentre.Then we need to drop a perpendicular from this point to get the inradius.But that hardly helps us.I have found some similar triangles in the figure.But that does not help me at all.  I have also tried backtracking.I tried to put myself in the problem-maker's shoes and tried to imagine what I would do if I had to create a problem like this.Unfortunately,I couldn't do it..  Any insightful comment,hint will be very much  appreciated. This is a follow-up to .     When I click a link to an SE site in the Android app, it gives me an "open with" pop-up that has two options:         Chrome   Stack Exchange         I can then choose to open SE posts like this "Just once" or "Always."      The problem is that when I set the SE app to "always," and I click "open in browser,"   Except, the app crashes when trying to open it in browser.  LogCat (just right after selecting "Open in browser")  01-22 18:03:36.354: E/AndroidRuntime(16064): FATAL EXCEPTION: main 01-22 18:03:36.354: E/AndroidRuntime(16064): Process: com.stackexchange.marvin, PID: 16064 01-22 18:03:36.354: E/AndroidRuntime(16064): java.lang.NullPointerException: Attempt to invoke interface method 'int java.util.List.size()' on a null object reference 01-22 18:03:36.354: E/AndroidRuntime(16064):    at com.stackexchange.marvin.utils.Helpers.getNonMarvinViewIntent(Helpers.java:452) 01-22 18:03:36.354: E/AndroidRuntime(16064):    at com.stackexchange.marvin.ui.question.QuestionDialog$1.onClick(QuestionDialog.java:39) 01-22 18:03:36.354: E/AndroidRuntime(16064):    at com.android.internal.app.AlertController$AlertParams$3.onItemClick(AlertController.java:1108) 01-22 18:03:36.354: E/AndroidRuntime(16064):    at android.widget.AdapterView.performItemClick(AdapterView.java:310) 01-22 18:03:36.354: E/AndroidRuntime(16064):    at android.widget.AbsListView.performItemClick(AbsListView.java:1145) 01-22 18:03:36.354: E/AndroidRuntime(16064):    at android.widget.AbsListView$PerformClick.run(AbsListView.java:3066) 01-22 18:03:36.354: E/AndroidRuntime(16064):    at android.widget.AbsListView$3.run(AbsListView.java:3903) 01-22 18:03:36.354: E/AndroidRuntime(16064):    at android.os.Handler.handleCallback(Handler.java:739) 01-22 18:03:36.354: E/AndroidRuntime(16064):    at android.os.Handler.dispatchMessage(Handler.java:95) 01-22 18:03:36.354: E/AndroidRuntime(16064):    at android.os.Looper.loop(Looper.java:148) 01-22 18:03:36.354: E/AndroidRuntime(16064):    at android.app.ActivityThread.main(ActivityThread.java:5417) 01-22 18:03:36.354: E/AndroidRuntime(16064):    at java.lang.reflect.Method.invoke(Native Method) 01-22 18:03:36.354: E/AndroidRuntime(16064):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 01-22 18:03:36.354: E/AndroidRuntime(16064):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)   I suspect it's related to , but not sure.  Specs:   Device model: Nexus 5 Android version: Android 6.0.1 SE app version: 1.0.82 (beta) Installed browser: Chrome 47.0.2526.83 (latest at current writing) Which equals operator (== vs ===) should be used in JavaScript comparisons? I'm using  to go through JavaScript, and it's returning many suggestions to replace == (two equals signs) with === (three equals signs) when doing things like comparing idSele_UNVEHtype.value.length == 0 inside of an if statement.  Is there a performance benefit to replacing == with ===?   Any performance improvement would be welcomed as many comparison operators exist.  If no type conversion takes place, would there be a performance gain over ==? I am new to ubuntu and i would like some help. I have a laptop with windows 7 installed but i would love to have ubuntu too because it's a great OS. So i would like to install ubuntu on an external usb hard drive (320 - 500 GB) and i have some questions about that :   Do i need a usb external hard drive which will be compatible with ubuntu - linux ? or i can do it with any hard drive  If i make a partition on it for ubuntu staff will i be able to use it and save other staff in the usb hard drive (movies,songs,documents etc) ? If i have ubuntu installed on the usb hard drive will i be able to boot ubuntu from any pc ? Are my changes going to be saved normally or my settings will be lost after shut down ?   Waiting for your answers, if something is not explain well tell me to try explain it better . Thank you! System.ListException: Before Insert or Upsert list must not have two identically equal elements - Deep Dive I had the following exception thrown at me when trying to process more than one selected records via a custom button in the list view.    Class Code  global class MerchandiseInventoryClass {      webservice static void ConverttoInventory(String[] merchandise_id)    {        //Convert Merchandise collection into Inventory Collection...         Merchandise__c[] merchandise_collection = [SELECT ID,Author__c,Book_Title__c,Edition__c,Publisher__c,Total_Merchandise_QtyTotal_Qty__c,Status__c FROM Merchandise__c WHERE ID = :merchandise_id];          Inventory__c i = new Inventory__c(); //Line 1        List&lt;Inventory__c&gt; newInventory = new List&lt;Inventory__c&gt;();        for(Merchandise__c m : merchandise_collection )        {            if(m.Status__c !='Fully Converted')            {            i.Author__c = m.Author__c ;            i.Book_Title__c = m.Book_Title__c;            i.Edition__c = m.Edition__c;            i.Publisher__c = m.Publisher__c;            i.Qty_Available__c = m.Total_Merchandise_QtyTotal_Qty__c;            i.Merchandise__c = m.Id;            m.Uninventoried_Qty__c = 0;            m.Status__c = 'Fully Converted';            newInventory.add(i);            }        }        insert newInventory;        update merchandise_collection;    }  }   By moving the Line 1 to within the for loop solved the issue for me.  Thanks to this post (refer the Best Answer in that post)    What puzzles me is that WHY i have to instantiate "i" for every iteration within the loop.  Why the list collection ("newInventory") is complaining that are duplicate elements and why should it even confuse in the first place when I am performing an "insert" even ? Windows 7, file properties, date modified, how do you show seconds? Anyone know a way to immediately show the seconds of a file's date modified property in the GUI? So if you create a file, any file in any directory, right-click and choose Properties, the date modified (if it's recent) will say something like "dd/mm/yyy hh:mm, one minute ago" - reminder this is in Windows 7. Windows XP did it normally. Then they changed something.  If you wait a while, eventually you'll see the seconds, I'm not sure how long a while is, but this is incredibly annoying if you want to troubleshoot something that relies on the seconds of timestamps... is there a setting? registry key I can change perhaps?  I'm literally using Chrome, pasting in the path of the directory to be able to see the seconds quickly (as a workaround) but would be nice to be able to use Win7. Let $R$ be a commutative ring with identity, and $S$ a multiplicative subset of $R$ not containing $0$. Which step in my reasoning is wrong?   Every element of $S$ is a unit in $S^{-1}R$. Every element of $S$ that's a zero divisor in $R$ is a zero divisor in $S^{-1}R$. But zero divisors can't be units. Therefore it's not possible to localize $R$ at $S$. How to control your iPad with your Mac remotely? I would like to know, is there a way to control your iPad with your Mac remotely (be able to see and manipulate iPad's desktop on your Mac)? I know that with the TeamViewer or other programs you can control your Mac with your iPad but not vice versa. Is $\mathbf{Q}(\sqrt{2}, \sqrt{3}) = \mathbf{Q}(\sqrt{2}+\sqrt{3})$? Is $\mathbf{Q}(\sqrt{2}, \sqrt{3}) = \mathbf{Q}(\sqrt{2}+\sqrt{3})$ ?    $$\mathbf{Q}(\sqrt{2},\sqrt{3})=\{a+b\sqrt{2}+c\sqrt{3}+d\sqrt{6} \mid a,b,c,d\in\mathbf{Q}\}$$   $$\mathbf{Q}(\sqrt{2}+\sqrt{3}) = \lbrace a+b(\sqrt{2}+\sqrt{3}) \mid a,b \in \mathbf{Q} \rbrace  $$  So if an element is in $\mathbf Q(\sqrt{2},\sqrt{3})$, then it is in $\mathbf{Q}(\sqrt{2}+\sqrt{3})$, because $\sqrt{6} = \sqrt{2}\sqrt{3}$.  How to conclude from there?