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In absence of preprocessor macros, is there a way to define practical scheme specific flags at proje
... project level. The simplest example is the DEBUG=1 macro that is defined by default for all Xcode projects in the default scheme for the Run build. One could query #ifdef DEBUG ... and make decisions in the code accordingly, even compiling out non-necessary code.
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How to get progress from XMLHttpRequest
Is it possible to get the progress of an XMLHttpRequest (bytes uploaded, bytes downloaded)?
8 Answers
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Instantiating a generic class in Java [duplicate]
...da useless to me, just a convoluted way of passing Foo.class to the object by declaring another class
– newacct
Jul 27 '09 at 2:19
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How to define several include path in Makefile
... imageUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454...
C# Regex for Guid
...false positives which have a wrong closing delimiter.
This can be avoided by regex conditionals which are broadly supported.
Conditionals are supported by the JGsoft engine, Perl, PCRE, Python, and the .NET framework.
Ruby supports them starting with version 2.0. Languages such as Delphi, PHP, an...
Why do we need a pure virtual destructor in C++?
...assignment but not much else)
...it's easiest to make the class abstract by making the destructor pure virtual and providing a definition (method body) for it.
For our hypothetical ABC:
You guarantee that it cannot be instantiated (even internal to the class itself, this is why private construct...
How to theme the ENTIRE Xcode IDE to light-on-dark?
...ded.
You can also change the debug console to have a different background by going into preferences ⌘., then go to Fonts & Colors, then select the Console. Now you can edit its background:
Just be sure to edit the font colors of the various input and outputs texts if you choose black. By d...
How do I remove a file from the FileList
... Common input element APIs. It appears you can delete the entire file list by setting the value property of the input object to an empty string, like:
document.getElementById('multifile').value = "";
BTW, the article Using files from web applications might also be of interest.
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PHP passing $_GET in linux command prompt
...ate the $_SERVER['QUERY_STRING'], but you can easily affect the same thing by referencing $_SERVER['argv'][1].
– Eric L.
Jul 31 '13 at 14:31
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Is there a REAL performance difference between INT and VARCHAR primary keys?
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You make a good point that you can avoid some number of joined queries by using what's called a natural key instead of a surrogate key. Only you can assess if the benefit of this is significant in your application.
That is, you can measure the queries in your application that are the most im...