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What's a reliable way to make an iOS app crash?
...see Is null pointer dereference undefined behavior in Objective-C?)
(in swift you would have to bridge to objC to do this)
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Where is Java Installed on Mac OS X?
...d on a terminal shell to figure out where is your Java 1.8 home directory
If you just want to find out the home directory of your most recent version of Java, omit the version. e.g. /usr/libexec/java_home
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How would you implement an LRU cache in Java?
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I like lots of these suggestions, but for now I think I'll stick with LinkedHashMap + Collections.synchronizedMap. If I do revisit this in the future, I'll probably work on extending ConcurrentHashMap in the same way LinkedHashMap extends HashMap.
UPDATE:
By reques...
What's the difference between deadlock and livelock?
...Assume A receives (or already has) r1, and B receives (or already has) r2. Now each try to get the resource the other has, without any timeout. A is blocked because B holds r2, and B is blocked because A holds r1. Each process is blocked and thus cannot release the resource the other wants, causing ...
How to pass parameters to ThreadStart method in Thread?
...- you are correct. All I should have said is that one should be aware that if the 'filename' changes before the thread starts the new value will be used. I shouldn't have been blabbering about the mechanics of it and I definitely shouldn't be talking about referencing.
– tymtam...
How to enter command with password for git pull?
...helper to honor XDG configuration file locations when specified.
The doc now say:
If not specified:
credentials will be searched for from ~/.git-credentials and $XDG_CONFIG_HOME/git/credentials, and
credentials will be written to ~/.git-credentials if it exists, or $XDG_CONFIG_HOME/...
How to exit pdb and allow program to continue?
...d show
something like: (pdb) .....
- switch back to pdb, then press Enter, now you are all set, pdb command
shell reappear again
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Solving a “communications link failure” with JDBC and MySQL [duplicate]
...6_SECURITY=no
use validationQuery property
use validationQuery="select now()" to make sure each query has responses
AutoReconnect
Add this code to your connection string:
&autoReconnect=true&failOverReadOnly=false&maxReconnects=10
Although non of these solutions worked for m...
ZMQ: 基本原理 - 开源 & Github - 清泛网 - 专注C++内核技术
... 为了强化这个原则，ØMQ严格地分离拓扑的建立（zmq_bind,zmq_connect）和真实消息的传递（zmq_send,zmq_rev)。 前者同底层的传输地址协同工作，比如IP地址，而后者仅仅使用处理器（文件描述符）去定位具体的拓扑： /* Topology esta...
Using Regular Expressions to Extract a Value in Java
...p and given string
Matcher m = p.matcher("Testing123Testing");
// if an occurrence if a pattern was found in a given string...
if (m.find()) {
// ...then you can use group() methods.
System.out.println(m.group(0)); // whole matched expression
System.out.println(m...