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What does “opt” mean (as in the “opt” directory)? Is it an abbreviation? [closed]
...kages; i.e. packages that you might have paid extra money for. I don't recall seeing "/opt" on Berkeley BSD UNIX. They used "/usr/local" for stuff that you installed yourself.
But of course, the true "meaning" of the different directories has always been somewhat vague. That is arguably a good t...
How can I get a collection of keys in a JavaScript dictionary? [duplicate]
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To loop through the "dictionary" (we call it object in JavaScript), use a for in loop:
for(var key in driversCounter) {
if(driversCounter.hasOwnProperty(key)) {
// key = keys, left of the ":"
// driversCounter[key] = value, ri...
Can I force a UITableView to hide the separator between empty cells? [duplicate]
... a large enough number of cells that the UITableView cannot display them all without scrolling, no separators appear in the empty space below the cells. If I have only a few cells the empty space below them includes separators.
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Is there a command to list SVN conflicts?
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To use this same command on OSX, you need to install GNU grep because the BSD grep doesn't have the perl regex flag (-P)
– G.Rassovsky
Jun 15 '15 at 12:13
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Subtract 7 days from current date
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Actually this can be done simply by: [now dateByAddingDays:-7]
– CrashOverride
Mar 5 '15 at 23:45
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Yii2 data provider default sorting
...re(['status' => 1])
->orderBy($sort->orders)
->all();
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Simplest way to do a fire and forget method in c# 4.0
I really like this question:
4 Answers
4
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SQL to find the number of distinct values in a column
I can select all the distinct values in a column in the following ways:
11 Answers
11
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python: SyntaxError: EOL while scanning string literal
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I had this problem - I eventually worked out that the reason was that I'd included \ characters in the string. If you have any of these, "escape" them with \\ and it should work fine.
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How do I count unique values inside a list
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This is like a Counter but really inefficient cause most of the counts are thrown away, and list.count() is O(n) anyway. You don't even need to convert aa to list at all. See Vidul's answer instead.
– wjandrea
Sep 2...