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Why does NULL = NULL evaluate to false in SQL server

...ran and C. J. Date said: “It is this writer’s opinion than NULLs, at least as currently defined and implemented in SQL, are far more trouble than they are worth and should be avoided; they display very strange and inconsistent behavior and can be a rich source of error and confusion. (...
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How can I delete all unversioned/ignored files/folders in my working copy?

...an extra double quote at the end. I'd just add it, but edits have to be at least six characters apparently. – Ian Miller Feb 8 '17 at 15:52 add a comment  |...
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Sublime Text 2 keyboard shortcut to open file in specified browser (e.g. Chrome)

...ave configured for build, maybe its F7 or Ctrl+B on a Windows machine) At least this should give you a push in the right direction. Edit: Another thing I end up doing a lot in Sublime Text 2 is if you right click inside a document, one of the items in the context menu is Copy File Path, which put...
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Why doesn't JUnit provide assertNotEquals methods?

...eat case when adding a method would diminish the complexity of the API, at least for me: Symmetry helps ruling the bigger space. My guess is that the reason for the omission may be that there are too few people calling for the method. Yet, I remember a time when even assertFalse did not exist; hence...
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Schrödingers MySQL table: exists, yet it does not

... The fix turns out to be easy; at least what I worked out, worked for me. Create a table "zzz" on another MySQL instance, where zzz is the problem table name. (i.e. if the table is called schrodinger, substitute that for zzz whever written.) It does not...
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What is the best way to implement a “timer”? [duplicate]

...ple would be great! For this question, "best" is defined as most reliable (least number of misfires) and precise. If I specify an interval of 15 seconds, I want the target method invoked every 15 seconds, not every 10 - 20 seconds. On the other hand, I don't need nanosecond accuracy. In this example...
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How would you go about parsing Markdown? [closed]

... If Perl isn't your thing, there are Markdown implementations in at least 10 other languages. They probably don't all have 100% compatibility, but tend to be pretty close. share | improve th...
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Fragment onResume() & onPause() is not called on backstack

...d()/remove() while performing transaction, so this answer is misleading at least for the recent versions of Android. – Dmide Nov 25 '14 at 14:37 ...
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Android: Storing username and password?

...rooted phones it is possible to access the preferences file of an app. The least you can do is obfuscate the password. – Jayesh Dec 18 '09 at 18:15 51 ...
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Optional Parameters in Go?

... Just FYI, the original author of this idiom, at at least the first publisher referenced, is Commander Rob Pike, whom I consider authoritative enough for Go philosophy. Link - commandcenter.blogspot.bg/2014/01/…. Also search for "Simple is complicated". ...