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Double negation (!!) in javascript - what is the purpose? [duplicate]
...alent to false in conditional statements:
false
null
undefined
The empty string "" (\ '')
The number 0
The number NaN
All other values are equivalent to true.
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Hidden features of Android development?
...g a new annotated subfolder (Eg. values-fr) that contains an XML file with strings in a different language (Eg. French). Android will choose the right folder at runtime for you.
The same resources framework lets you use alternate layouts for different hardware configurations, screen pixel densitie...
Is key-value observation (KVO) available in Swift?
...observerContext)
}
override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
guard context == &observerContext else {
super.observeValue(forKeyPath: keyPath, of: object, change:...
Have the same README both in Markdown and reStructuredText
...ndoc is not available, you should set long_description to None or an empty string.
– Cerin
May 14 '14 at 19:38
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How to set TextView textStyle such as bold, italic
... have two options:
Option 1 (only works for bold, italic and underline):
String s = "<b>Bolded text</b>, <i>italic text</i>, even <u>underlined</u>!"
TextView tv = (TextView)findViewById(R.id.THE_TEXTVIEW_ID);
tv.setText(Html.fromHtml(s));
Option 2:
Use a Spa...
Strange \n in base64 encoded string in Ruby
...ve checked Base64.strict_encode64 is not properly encoded three character string. like Base64.strict_encode64('abc') -> YWJj . the above example is not encoded correctly.
– CodeMaker
Sep 17 '19 at 11:01
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How to detect unused methods and #import in Objective-C
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Furthermore, selectors that are created based on strings at runtime are quite common.
– dreamlax
Sep 22 '09 at 6:54
1
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Can I invoke an instance method on a Ruby module without including it?
...space with all of them. A simple example if there's a Files.truncate and a Strings.truncate and I want to use both in the same class, explicitly. Creating a new class/instance each time I need a specific method or modifying the original is not a nice approach, though I'm not a Ruby dev.
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How does UTF-8 “variable-width encoding” work?
...
UTF-8 was another system for storing
your string of Unicode code points,
those magic U+ numbers, in memory
using 8 bit bytes. In UTF-8, every
code point from 0-127 is stored in a
single byte. Only code points 128 and
above are stored using 2, 3, in fact,
...
how to get first three characters of an NSString?
How can I return the first three characters of an NSString?
3 Answers
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