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Swift: Testing optionals for nil
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From swift programming guide
If Statements and Forced Unwrapping
You can use an if statement to find out whether an optional contains a
value. If an optional does have a value, it evaluates to true; if it
has no...
How can I overwrite a getter method in an ActiveRecord model?
...only answers are not allowed on SO, please add some context to your answer from what's behind that link. Thanks! :)
– AJT82
Feb 17 '17 at 10:03
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How to programmatically create and read WEP/EAP WiFi configurations in Android?
... Toast toast2 = Toast.makeText(this, "Extract ReadConfigLog.txt from SD CARD", 5000);
}
else
{
result = (String)wcefClientCert.get(config);
}
out.close();
}
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How to change facet labels?
...alue])
} else {
return(as.character(value))
}
}
Answer adapted from how to change strip.text labels in ggplot with facet and margin=TRUE
edit: WARNING: if you're using this method to facet by a character column, you may be getting incorrect labels. See this bug report. fixed in recent...
What is the Java ?: operator called and what does it do?
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May I direct you to this page from Oracle which speaks of three "conditional operators" but only one "ternary operator"? If you want to make it clear which operator you mean, it's probably better to use the name that most people use. (Yes, I know I'm sh...
How do I paste multi-line bash codes into terminal and run it all at once?
...ach, and more flexible/forgiving...
If you'd like to paste multiple lines from a website/text editor/etc., into bash, regardless of whether it's commands per line or a function or entire script... simply start with a ( and end with a ) and Enter, like in the following example:
If I had the followi...
HTML if image is not found
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@NicoHaase its url from php framework, well you can always write your own url for image, i have given an example that doesnt mean you should copy and paste it or concentrate on that url, you include your url it means. To explain you have to giv...
What to put in a python module docstring? [closed]
...s (and functions too, though I'm not showing one here) is already included from those components' docstrings; the module's own docstring should describe them very summarily (if at all) and rather concentrate on a concise summary of what the module as a whole can do for you, ideally with some doctest...
How to make a phone call using intent in Android?
...phone = "+34666777888";
Intent intent = new Intent(Intent.ACTION_DIAL, Uri.fromParts("tel", phone, null));
startActivity(intent);
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MySQL - Make an existing Field Unique
...but in English Version should be the same. Just click Unique button. Also from there you can make your columns PRIMARY or DELETE.
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