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Getting time elapsed in Objective-C
...ate];
// do stuff...
NSTimeInterval timeInterval = [start timeIntervalSinceNow];
timeInterval is the difference between start and now, in seconds, with sub-millisecond precision.
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Nokogiri installation fails -libxml2 is missing
...sing. After that I ran:
yum install libxml2-devel libxslt libxslt-devel
Now Nokogiri compiles in Fedora and Nokogiri installs. D'oh!, we need the headers to compile Nokogiri from the devel libraries.
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Count number of rows within each group
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I don't know but this could be useful as well... df %>% group_by(group, variable) %>% mutate(count = n())
– Manoj Kumar
Dec 14 '16 at 17:57
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How to scroll HTML page to given anchor?
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This is a clean solution, however as of now it doesn't allow any tweaking, it does a hard scroll. There is an experimental parameter scrollIntoViewOptions that has a behavior: "smooth" option, but it is currently compatible with Firefox only.
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angular ng-repeat in reverse
...g}}</alert>
Update:
My answer was OK for old version of Angular.
Now, you should be using
ng-repeat="friend in friends | orderBy:'-'"
or
ng-repeat="friend in friends | orderBy:'+':true"
from https://stackoverflow.com/a/26635708/1782470
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Add custom messages in assert?
... << ", line " << line << "\n";
abort();
}
}
Now, you can use this
M_Assert(ptr != nullptr, "MyFunction: requires non-null argument");
And in case of failure you will get a message like this:
Assert failed: MyFunction: requires non-null argument
Expected: pt...
How to go back to previous page if back button is pressed in WebView?
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If using Android 2.2 and above (which is most devices now), the following code will get you what you want.
@Override
public void onBackPressed() {
if (webView.canGoBack()) {
webView.goBack();
} else {
super.onBackPressed();
}
}
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CORS: Cannot use wildcard in Access-Control-Allow-Origin when credentials flag is true
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Ah, now that's more convenient, however, the result's the same :( BTW, I'm using app.use(cors({credentials: true}));
– ixaxaar
Nov 2 '13 at 15:34
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How to trim a string in SQL Server before 2017?
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SQL Server now has TRIM in the 2017 version. docs.microsoft.com/en-us/sql/t-sql/functions/trim-transact-sql
– goodeye
Jun 15 '17 at 19:23
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Selecting the last value of a column
...pefully one that is not hard coded), but this is the best I could find for now.
Note that if you use the function in cell like stated earlier, it will update upon reload. Maybe there is a way to hook into onEdit() and force in cell functions to update. I just can't find it in the documentation.
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