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PHP check whether property exists in object or class
...t have a middle name';
To show how this would look in an if statement for more clarity on how this is working.
if($person->middleName ?? false) {
echo $person->middleName;
} else {
echo 'Person does not have a middle name';
}
Explanation
The traditional PHP way to check for someth...
What are the most-used vim commands/keypresses?
...ly use regularly:
References
vim documentation online
advanced vim tips
more useful tips and graphical cheat sheet
General
Nearly all commands can be preceded by a number for a repeat count. eg. 5dd delete 5 lines
<Esc> gets you out of any mode and back to command mode
Commands preceded...
When would you use the different git merge strategies?
...d to specify octopus merge strategy: it is used automatically if you merge more than two branches (git merge A B ...).
– Jakub Narębski
Dec 4 '09 at 18:40
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optional local variables in rails partial templates: how do I get out of the (defined? foo) mess?
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160
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Histogram using gnuplot?
...nd it is often easier to use an external programme (e.g. Octave) to do the more "complicated" calculations, save this data in a file, then use Gnuplot to produce the graph. For the above problem, check out the "hist" function is Octave using [freq,bins]=hist(data), then plot this in Gnuplot using
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The SMTP server requires a secure connection or the client was not authenticated. The server respons
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149
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How can I use Async with ForEach?
...approach over giving an async delegate to ForEach are:
Error handling is more proper. Exceptions from async void cannot be caught with catch; this approach will propagate exceptions at the await Task.WhenAll line, allowing natural exception handling.
You know that the tasks are complete at the end...
Error - trustAnchors parameter must be non-empty
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274
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Java 32-bit vs 64-bit compatibility
...s the other way around. Have rolled back an edit and edited (and put a bit more information in).
– Tom Hawtin - tackline
Apr 24 '09 at 7:15
4
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Read a file one line at a time in node.js?
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167
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