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What is a smart pointer and when should I use one?
...ointer exception.
OLD ANSWER
A smart pointer is a class that wraps a 'raw' (or 'bare') C++ pointer, to manage the lifetime of the object being pointed to. There is no single smart pointer type, but all of them try to abstract a raw pointer in a practical way.
Smart pointers should be preferred...
Storing a Map using JPA
...
@ElementCollection(fetch = FetchType.LAZY)
@CollectionTable(name = "raw_events_custom", joinColumns = @JoinColumn(name = "raw_event_id"))
@MapKeyColumn(name = "field_key", length = 50)
@Column(name = "field_val", length = 100)
@BatchSize(size = 20)
private Map<String, String>...
How to write string literals in python without having to escape them?
...
Raw string literals:
>>> r'abc\dev\t'
'abc\\dev\\t'
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Java: Difference between PrintStream and PrintWriter
...ns between PrintStream and PrintWriter are that a PrintWriter cannot write raw bytes and the two classes wrap different types of destinations.
– Ted Hopp
May 9 '13 at 3:47
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In Java, is there a way to write a string literal without having to escape quotes?
...
Update Dec. 2018 (12 months later):
Raw string literals (which are on the amber list) won't make it to JDK 12.
See the criticisms here.
There might be in a future version of Java (10 or more).
See JEPS 8196004 from January 2018: ("JEP" is the "JDK Enhancement ...
How to avoid “cannot load such file — utils/popen” from homebrew on OSX
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Uninstall homebrew:
ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/uninstall)"
Then reinstall
ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
Warning: This script will remove: /Library/Caches/Hom...
How to fix “Headers already sent” error in PHP
...eader / header_remove
session_start / session_regenerate_id
setcookie / setrawcookie
Output can be:
Unintentional:
Whitespace before <?php or after ?>
The UTF-8 Byte Order Mark specifically
Previous error messages or notices
Intentional:
print, echo and other functions producing ...
Uri to default sound notification?
...tomSoundUri = Uri.parse("android.resource://" + getPackageName() + "/" + R.raw.twirl);
Source of notification sound (I renamed to "twirl" and placed in
res->raw folder)
https://notificationsounds.com/message-tones/twirl-470
Notification builder:
NotificationCompat.Builder mBuilder =
...
Brew doctor says: “Warning: /usr/local/include isn't writable.”
...
For High Sierra:
/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
Then, try your brew commands.
Issue #3285
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Convert Python dictionary to JSON array
...sr/lib/python2.7/json/decoder.py", line 365, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "/usr/lib/python2.7/json/decoder.py", line 381, in raw_decode
obj, end = self.scan_once(s, idx)
UnicodeDecodeError: 'utf8' codec can't decode byte 0xff in position 0: invalid start...