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Using the Swift if let with logical AND operator &&
We know that we can use an if let statement as a shorthand to check for an optional nil then unwrap.
6 Answers
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Getting the client's timezone offset in JavaScript
...t);
The time-zone offset is the difference, in minutes, between UTC and local time. Note that this means that the offset is positive if the local timezone is behind UTC and negative if it is ahead. For example, if your time zone is UTC+10 (Australian Eastern Standard Time), -600 will be retu...
What is :: (double colon) in Python when subscripting sequences?
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it means 'nothing for the first argument, nothing for the second, and jump by three'. It gets every third item of the sequence sliced.
Extended slices is what you want. New in Python 2.3
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How to generate gcc debug symbol outside the build target?
...a .debug extension in a .debug directory. This way I can tar the libraries and executables in one tar file and the .debug directories in another. If I want to add the debug info later on I simply extract the debug tar file and voila I have symbolic debug information.
This is the bash script:
#!/bi...
Literal suffix for byte in .NET?
...re a byte variable in a short way like floats or doubles? I mean like 5f and 5d . Sure I could write byte x = 5 , but that's a bit inconsequential if you use var for local variables.
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How to count duplicate value in an array in javascript
...eturns the value of counts[x] if it is set, otherwise 0. Then just add one and set it again in the object and the count is done.
– Constantinius
Feb 7 '17 at 11:52
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How can I suppress all output from a command using Bash?
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The following sends standard output to the null device (bit bucket).
scriptname >/dev/null
And if you also want error messages to be sent there, use one of (the first may not work in all shells):
scriptname &>/dev/null
scriptname >...
Versioning SQL Server database
....html. I choose not to put schema dumps in under version control as alumb and others suggest because I want an easy way to upgrade my production database.
For a web application where I'll have a single production database instance, I use two techniques:
Database Upgrade Scripts
A sequence databa...
How to add spacing between UITableViewCell
...I have a problem when selected cell. I have set the border for contentView and whenever I selected cell the border will be smaller. How can I fix it?
– Bad_Developer
Mar 24 '17 at 11:09
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How and when to use ‘async’ and ‘await’
From my understanding one of the main things that async and await do is to make code easy to write and read - but is using them equal to spawning background threads to perform long duration logic?
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