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WPF Data Binding and Validation Rules Best Practices
... I am using data binding to allow editing of some custom CLR objects. I am now wanting to put some input validation in when the user clicks save. However, all the WPF books I have read don't really devote any space to this issue. I see that you can create custom ValidationRules, but I am wondering i...
what is the preferred way to mutate a React state?
...ldn't you be wrapping the function body in parenthesis? As it stands right now in your example, the braces after the fat arrow would start a block, not an object. Something like this: this.setState((state) => ({ list: state.list.push(newObj) }))
– kumarharsh
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How can I run a directive after the dom has finished rendering?
...ealised I hadn't passed $timeout into the directive. Doh. Everything works now, cheers.
– Jannis
Sep 19 '12 at 2:44
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How to sum a variable by group
... soon for example, since some data.table users have 250GB of RAM and GNU R now supports length > 2^31.
– Matt Dowle
Sep 9 '13 at 10:05
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How to set time delay in javascript
...ally does that?
I will explain in brief.
To understand that you have to know about event queue in javascript. There is a event queue implemented in browser. Whenever an event get triggered in js, all of these events (like click etc.. ) are added to this queue. When your browser has nothing to ex...
What approaches are available to dummy design-time data in WPF?
...hould really be edited into the answer, especially since the first link is now dead.
– Lauraducky
Dec 13 '17 at 0:42
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What's better at freeing memory with PHP: unset() or $var = null
...pdate , is actually a language construct), but it would be interesting to know if one is better than the other. I have been using unset() for most of my coding, but I've recently looked through a few respectable classes found off the net that use $var = null instead.
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Get ffmpeg information in friendly way
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Now is possible to use -progress - to print friendly info formatted by key=value.
ffmpeg -i video.mp4 .......-s 1920x1080 -progress - -y out.mp4
speed=5.75x
frame=697
fps=167.7
stream_0_0_q=39.0
bitrate=2337.0kbits/s
total...
How to change node.js's console font color?
...ter escape. Escape sequences dealing only with colors and styles are also known as ANSI escape code and are standardized, so therefore they (should) work on any platform.
Wikipedia has a nice comparison of how different terminals display colors
https://en.wikipedia.org/wiki/ANSI_escape_code#Colors...
Eclipse “Error: Could not find or load main class”
...standard libraries like the JRE System Library.
Try to run your main class now. The "class could not be found / load" error should be gone. Try adding your external libs/jars one after each other.
Reason behind this: The compiler had issues linking the libraries to the project. It failed and produ...