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Example for boost shared_mutex (multiple reads/one write)?

I have a multithreaded app that has to read some data often, and occasionally that data is updated. Right now a mutex keeps access to that data safe, but it's expensive because I would like multiple threads to be able to read simultaneously, and only lock them out when an update is needed (the updat...
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How can I get query string values in JavaScript?

...&myparam=2. There is not a specification, however, most of the current approaches follow the generation of an array. myparam = ["1", "2"] So, this is the approach to manage it: let urlParams = {}; (window.onpopstate = function () { let match, pl = /\+/g, // Regex for replacing ...
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Benefits of header-only libraries

...ep for the user - compiling your library before using it. Of course, this applies on a case-by-case basis. For example, header-only libraries sometimes increase code size & compilation times. share | ...
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Restart node upon changing a file

...lly: npm install supervisor -g and after migrating to the root of your application use the following supervisor app.js share | improve this answer | follow ...
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Custom Cell Row Height setting in storyboard is not responding

...etting inside the "size inspector" of the cell in question. When I run the app on my iPhone the cell has the default size set from the "row size" in the table view. ...
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Serving gzipped CSS and JavaScript from Amazon CloudFront via S3

...s.type = "text/css"; scriptStyles.href = sr_css_file; head.appendChild(scriptStyles); //alert('adding css to header:'+sr_css_file); } }()); </script> gzipcheck.js.jgz is just sr_gzipEnabled = true; This tests to make sure the browser can handle the gzipped code...
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Strange out of memory issue while loading an image to a Bitmap object

... my button to launch the image preview (load an image off the SD card) the application returns from the activity back to the listview activity to the result handler to relaunch my new activity which is nothing more than an image widget. ...
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Principles for Modeling CouchDB Documents

...ow you to request the post's unified output document this way: /db/_design/app/_list/posts/unified??start_key=["123412804910820"]&end_key=["123412804910820", {}, {}]&include_docs=true Your _list function (in this case named "unified") would take the results of the view map/reduce (in this ca...
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JavaScript Chart Library

...rd-based browsers, rendered as VML in IE There are pros and cons of both approaches but for a charting library I would recommend the later because it is well integrated with DOM, allowing to manipulate charts elements with the DOM, and most importantly setting DOM events. By contrast Canvas charti...
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What is the best way to unit test Objective-C code?

...st Objective-C code? I would like a framework that integrates nicely with Apple Xcode. 17 Answers ...