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Xcode debugging - displaying images
... Awesome suggestion @mackworth. Thanks.
– arango_86
Jul 30 '18 at 10:15
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Sending a message to nil in Objective-C
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What it means is that the runtime doesn't produce an error when objc_msgSend is called on the nil pointer; instead it returns some (often useful) value. Messages that might have a side effect do nothing.
It's useful because most of the default values are more appropriate than an error. For e...
How to call Android contacts list?
...cation manifest.
<uses-permission android:name="android.permission.READ_CONTACTS"/>
2. Calling the Contact Picker
Within your Activity, create an Intent that asks the system to find an Activity that can perform a PICK action from the items in the Contacts URI.
Intent intent = new Intent(I...
Replacement for “rename” in dplyr
...me() function that works just like plyr::rename().
df <- rename(df, new_name = old_name)
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How do you move a commit to the staging area in git?
...dows. Tilde and carot are explained at schacon.github.io/git/git-rev-parse#_specifying_revisions
– ahains
Jun 4 '15 at 18:52
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How to test if a string is JSON or not?
... useful data or an error message string produced by the PHP function mysql_error() . How can I test whether this data is a JSON string or the error message.
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What is the convention for word separator in Java package names?
...ample, com.example.deepspace, not com.example.deepSpace or com.example.deep_space.
— Google Java Style Guide: 5.2 Rules by identifier type: 5.2.1 Package names.
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Escaping ampersand character in SQL string
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Instead of
node_name = 'Geometric Vectors \& Matrices'
use
node_name = 'Geometric Vectors ' || chr(38) || ' Matrices'
38 is the ascii code for ampersand, and in this form it will be interpreted as a string, nothing else. I tried ...
Is there a way to filter network requests using Google Chrome developer tools?
... response headers with value
# Ex: set-cookie-value:AISJHD98ashfa93q2rj_94w-asd-yolololo
status-code:
-status-code:
# Match HTTP status code
# Ex: status-code:200, -status-code:302
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How do I access this object property with an illegal name?
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<?php
$x = new StdClass();
$x->{'todo-list'} = 'fred';
var_dump($x);
So, $object->{'todo-list'} is the sub-object. If you can set it like that, then you can also read it the same way:
echo $x->{'todo-list'};
Another possibility:
$todolist = 'todo-list';
echo $x->$todolis...