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How to force a web browser NOT to cache images

...(date, place, title, description, links, etc.) and save it. On that form I allow the administrator to upload an image related to the event. On the HTML page displaying the form, I am also showing a preview of the picture uploaded (HTML img tag). ...
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How to use GROUP_CONCAT in a CONCAT in MySQL

...what you need. Update Splitting in two steps. First we get a table having all values(comma separated) against a unique[Name,id]. Then from obtained table we get all names and values as a single value against each unique id See this explained here SQL Fiddle Demo (scroll down as it has two result se...
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C# 4 default parameter values: How to assign a default DateTime/object value? [duplicate]

...You can call it with a named parameter like this: test(dt: new DateTime(2010, 03, 01)); And with the default parameter like this: test(); share | improve this answer | f...
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Generate random numbers with a given (numerical) distribution

...> choices(population, weights) 4 The optional keyword-only argument k allows one to request more than one sample at once. This is valuable because there's some preparatory work that random.choices has to do every time it's called, prior to generating any samples; by generating many samples at o...
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MySQL: determine which database is selected?

After calling mysql_select_db to grab a database, is there any way to later output the name of the database that is currently selected? This seems very basic but I couldn't find anything on php.net or stackoverflow (all results are for "no database selected"). ...
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Java 8 forEach with index [duplicate]

... way to build a forEach method in Java 8 that iterates with an index? Ideally I'd like something like this: 3 Answers ...
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How to install latest version of git on CentOS 7.x/6.x

... You can use WANDisco's CentOS repository to install Git 2.x: for CentOS 6, for CentOS 7 Install WANDisco repo package: yum install http://opensource.wandisco.com/centos/6/git/x86_64/wandisco-git-release-6-1.noarch.rpm - or - yum install http://opensource.wandisco.com/ce...
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Build the full path filename in Python

... | edited Jun 22 '17 at 10:01 Afshin Mehrabani 26.5k2222 gold badges117117 silver badges177177 bronze badges ...
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Download data url file

... just drag their zip directly into the browser and it'll let them download all the files within. They can also create new zip files by dragging individual files in. ...
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Declare a block method parameter without using a typedef

... MacmadeMacmade 47.4k1111 gold badges101101 silver badges120120 bronze badges 9 ...