conditional-statements

问题 I have the following code: <Import Project="C:\Program%20Files%20(x86)\MSBuild\ExtensionPack\4.0.13.0\x64\MSBuild.ExtensionPack.tasks" /> <PropertyGroup> <Workspace></Workspace> <SolutionName></SolutionName> <TargetEnv></TargetEnv> <DeployPath></DeployPath> <TargetBranch></TargetBranch> <BuildNumber></BuildNumber> <Revision></Revision> </PropertyGroup> <Target Name="assinfo"> <Choose> <When Condition=" '$(TargetEnv)'=='development' "> <PropertyGroup> <Revision>1</Revision> </PropertyGroup> <

问题 I came across this interesting paragraph in the Boost thread documentation today: void wait(boost::unique_lock<boost::mutex>& lock) ... Effects: Atomically call lock.unlock() and blocks the current thread. The thread will unblock when notified by a call to this->notify_one() or this->notify_all(), or spuriously . When the thread is unblocked (for whatever reason), the lock is reacquired by invoking lock.lock() before the call to wait returns. The lock is also reacquired by invoking lock.lock(

问题 I'm trying to say to Bash , wait for a Process Start / Begin. I'm trying by this way for example: notepad=`pidof notepad.exe` until [ $notepad > 0 ] do taskset -p 03 $notepad renice -n 5 -p $notepad sleep 5 renice -n 0 -p $notepad done well i have the follow questions: why this generate a file called “0″ (the file are empty) i dont wanna make a new file , just wait for the PID to check execution. This is a Loop , but if the 2 commands are execute correclty , 1 time how i can continue to done

问题 I am having trouble figuring out the proper implementation using logical/conditional operators. I have a very specific requirement for an application and I thought at first it was working correctly, but when placed on the Marketplace I come to find out my implementation is not working at all. If my application is in trial mode and the count of saved occurrences is > 100 the I need to perform an action. If the application is in Trial mode and the count of saved occurrences is <= 100, or the

问题 How to write SQL queries to support JSON where conditions matching for operators ? , ?|, ?&. id : 12, name: 'Harry Pottor', type: ['Fiction', 'Horror', 'Adventure' ] In Yii, when I write query for JSON array check with ?& operator gives me error. This query run successfully in pgAdmin SELECT id, name FROM books WHERE type ?& array['Fiction', 'Horror'] $commandSql = $connection->createCommand($sql); But ? mark operator gets replaced with $1 i.e. going for bind value. How to do this type of

问题 I need to check whether a given property exists in a JObject, to use with my ng-show directive for my Angular app. I tried accessing the property using the square brackets syntax: <li ng-show="@Model["punkt1"] != null">@Model.punkt1</li> This is an example of a JSON response: { "value": null, "editor": { "name": "Infobox", "alias": "infobox", "view": "/App_Plugins/MyGridEditor/infobox.html", "render": "/App_Plugins/MyGridEditor/infobox.cshtml", "icon": "icon-grid", "config": {} }, "active":

问题 I am new to programming, and one reoccuring pattern I notice is the frequent negation I have to use with while loops, for example while (!isEmpty()) Wouldn't it be better performance wise if there was a "until" loop, e.g. do something until a condition is true? I do realize negation happens on registers and is very fast, but still it looks like it can be avoided. Or maybe there is something about assembly language that makes it preferable to use the currently established approach, even if it

问题 tI have a Player model in my rails app. 2 columns I am evaluating are highestLevel and highestScore. This is a stats tracking for a single player across multiple profiles, so there is the possibility that either of these values coming in could be lower than the current value in the db. Therefore I only wish it update a particular column IF the incoming posted value is greater than the one in the DB. Reading up on some of the built in validation options, I was not able to get any to work as I

问题 I want to determine the AND clause based on the value of the current row. So for example, my job table has 4 date columns: offer_date, accepted_date, start_date, reported_date. I want to check against an exchange rate based on the date. I know the reported_date is never null, but it's my last resort, so I have a priority order for which to join against the exchange_rate table. I'm not quite sure how to do this with a CASE statement, if that's even the right approach. SELECT * FROM job j INNER

问题 I want to take cordinates from the URL and send them to a google map, in order to set the map center in that coordinates. I set a condition. If coordinates has not value it works, but if it has not the map doesn´t set center. This is my code. function getUrlVars() { var vars = [], hash; var hashes = window.location.href.slice(window.location.href.indexOf('?') + 1).split('&'); for(var i = 0; i < hashes.length; i++) { hash = hashes[i].split('='); vars.push(hash[0]); vars[hash[0]] = hash[1]; }