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What is the difference between Left, Right, Outer and Inner Joins?
...they have one".
This might be a general student list, or could be used to identify students with no locker. Returns 100 rows
RIGHT OUTER JOIN would be "show me all lockers, and the students assigned to them if there are any".
This could be used to identify lockers that have no students assigned, ...
Do SVG docs support custom data- attributes?
...red in XML attributes whose names start with data- such as <p data-myid="123456"> . Is this part of the SVG spec too?
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How can I pipe stderr, and not stdout?
... preserved as stderr, but you won't see any lines in stderr containing the string "something".
This has the unique advantage of not reversing or discarding stdout and stderr, nor smushing them together, nor using any temporary files.
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How to implode array with key and value without foreach in PHP
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Beware of the string encoding!If you are not building an URL maybe you do not want it on your array key&value
– Matteo
Sep 10 '14 at 12:51
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Convert UTC Epoch to local date
...ust it to the proper epoch, but the only method that seems useful is toUTCString() and strings don’t help me. If I pass that string into a new date, it should notice that it’s UTC, but it doesn’t.
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How to delete all files and folders in a directory?
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note that Empty exists in C# already, for string. If I saw something else named Empty I would be surprised if it modified the object (or filesystem) instead of giving me a bool that says if it is empty or not. Because of that, I would go with the name Clean.
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How to remove/change JQuery UI Autocomplete Helper text?
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I tried this and it puts the string "null" in the same place. The solution is to change to: noResults: '', and you will get no message at all.
– Patrick
Jan 11 '13 at 17:55
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How to find the last field using 'cut'
...,baz,qux
last=${data##*,}
See BashFAQ #100 for an introduction to native string manipulation in bash.
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How do you test to see if a double is equal to NaN?
... the following code.
public class Not_a_Number {
public static void main(String[] args) {
// TODO Auto-generated method stub
String message = "0.0/0.0 is NaN.\nsimilarly Math.sqrt(-1) is NaN.";
String dottedLine = "------------------------------------------------";
D...
Loop through all the files with a specific extension
... shell options. By default, a non-matching pattern is treated as a literal string. You can set nullglob to have it treated as an empty sequence, or set failglob to have it treated as an error. (If you set both, failglob takes precedence.)
– chepner
Jul 7 '17 at...