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Can I use CASE statement in a JOIN condition?
...return the value of an assignment or test for equality, neither of which make sense in the context of a CASE/THEN clause. (If BOOLEAN was a datatype then the test for equality would make sense.)
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How would you access Object properties from within an object method? [closed]
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Greg HurlmanGreg Hurlman
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How to make input type= file Should accept only pdf and xls
...sily be removed via some code inspector. So in either case you need to check the file type on the server side (your second question).
Example:
<input type="file" name="upload" accept="application/pdf,application/vnd.ms-excel" />
To your third question "And when I click the files (PDF/XLS) ...
Use email address as primary key?
...ins.
If you store information about users in multiple tables, the foreign keys to the users table will be the e-mail address. That means that you store the e-mail address multiple times.
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Intellij IDEA. Hide .iml files
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Check “Ignored files and folders” in File Types settings:
File | Settings | Editor | File Types for Windows and Linux
IntelliJ IDEA | Preferences | Editor | File Types for OS X
Then add *.iml;*.idea; in the text bo...
How can I check if a key exists in a dictionary? [duplicate]
Let's say I have an associative array like so: {'key1': 22, 'key2': 42} .
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How to determine equality for two JavaScript objects?
...e equal. However, is there a way to tell if two objects are equal, much like the hash code value in Java?
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Is “else if” faster than “switch() case”? [duplicate]
...h.
If a switch contains more than five items, it's implemented using a lookup table or a hash list. This means that all items get the same access time, compared to a list of if:s where the last item takes much more time to reach as it has to evaluate every previous condition first.
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How to check if running as root in a bash script
I'm writing a script that requires root level permissions, and I want to make it so that if the script is not run as root, it simply echoes "Please run as root." and exits.
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How to lock compiled Java classes to prevent decompilation?
How do I lock compiled Java classes to prevent decompilation?
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