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Using multiple let-as within a if-statement in Swift
...e code inside the if-let block won't be executed.
Note: the clauses don't all have to be 'let' clauses, you can have any series of boolean checks separated by commas.
For example:
if let latitudeDouble = latitude as? Double, importantThing == true {
// latitudeDouble is non-optional in here ...
What is the difference between a cer, pvk, and pfx file?
...authority certificates, and private keys. Its contents can be cryptographically protected (with passwords) to keep private keys private and preserve the integrity of root certificates.
Windows uses .pvk for a private key file. I'm not sure what standard (if any) Windows follows for these. Hopefully...
Most concise way to convert a Set to a List
...
... and thereby radically defying the Java code conventions: oracle.com/technetwork/java/javase/documentation/… ! :) :)
– Håvard Geithus
Feb 1 '14 at 0:49
...
Deleting all pending tasks in celery / rabbitmq
How can I delete all pending tasks without knowing the task_id for each task?
9 Answers
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How can you diff two pipelines in Bash?
...dev/fd/63 to get a filename that the command can open and read from to actually read from an already-open file descriptor that bash set up before exec'ing the command. (i.e. bash uses pipe(2) before fork, and then dup2 to redirect from the output of quux to an input file descriptor for diff, on fd ...
Getting back old copy paste behaviour in tmux, with mouse
...ss you re-map it). : starts command mode and set -g sets the parameter globally.
When mouse mode is turned off, the standard copy/paste functions provided by your operating system work as expected.
Something else you might want to do is 'maximise' the current pane, so you can copy multiple lines e...
How to display unique records from a has_many through relationship?
...ugh => :orders, :select => "DISTINCT products.*). In the first case, ALL records are fetched and rails removes the duplicates for you. In the later case, only non-duplicate records are fetched from the db so it might offer better performance if you have a large result set.
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Get current AUTO_INCREMENT value for any table
...
You can get all of the table data by using this query:
SHOW TABLE STATUS FROM `DatabaseName` WHERE `name` LIKE 'TableName' ;
You can get exactly this information by using this query:
SELECT `AUTO_INCREMENT`
FROM INFORMATION_SCHEMA.T...
How can I change the EditText text without triggering the Text Watcher?
... after update
et.addTextChangedListener(this);
}
}
Usage:
et_text.addTextChangedListener(new MyTextWatcher(et_text));
You may feel a little bit lag when entering text rapidly if you are using editText.setText() instead of editable.replace().
...
How to add a custom button state
...e correctly, and will fail silently; at least this is what happens to me.
Allow me to report here the whole solution, with some more details:
First, create file "res/values/attrs.xml":
<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable name="food">
...