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How to use wait and notify in Java without IllegalMonitorStateException?
...condition after they wake up to see whether they need to wait again or can start processing.
Use the same object for calling wait() and notify() method; every object has its own lock so calling wait() on object A and notify() on object B will not make any sense.
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How to get current relative directory of your Makefile?
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From the GNU Make manual (page 51): " when GNU make starts (after it has processed any -C options) it sets the variable CURDIR to the pathname of the current working directory." Not the location of where the Makefile is located - although, they might be the same.
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UITableView : viewForHeaderInSection: not called during reloadData:
...fine, until one day, with no change on my part, they didn't. That's when I started experimenting to discover what the minimal requirements are for viewForHeader to be called. And now I know. And now so do you.
– matt
Oct 2 '14 at 15:22
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Peak detection in a 2D array
... rough and ready approach, "the dumbest thing that could possibly work":
Start with five toe coordinates in roughly the place you expect.
With each one, iteratively climb to the top of the hill. i.e. given current position, move to maximum neighbouring pixel, if its value is greater than current p...
Node.js get file extension
...top at (without including that character). Also, substr() accepts negative start positions to be used as an offset from the end of the string while substring() does not.
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Fluent and Query Expression — Is there any benefit(s) of one over other?
... extension methods you can write your own.
I have found that every time I start writing a LINQ statement using the query syntax I end up having to put it in parenthesis and fall back to using fluent LINQ extension methods. Query syntax just doesn't have enough features to use by itself.
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Maven artifact and groupId naming
...ntions on groupId, artifactId, and version which proposes the groupId must start with a reversed domain name you control.
com means this project belongs to a company, and org means this project belongs to a social organization. These are alright, but for those strange domain like xxx.tv, xxx.uk, xx...
搭建高可用mongodb集群（一）——配置mongodb - 大数据 & AI - 清泛网 - 专...
...–master
输出日志如下，成功！
[initandlisten] MongoDB starting : pid=18285 port=27017 dbpath=/data/mongodbtest/master master=1
#日志显示主节点参数
[initandlisten] options: { dbpath: “/data/mongodbtest/master”, master: true }
……..
[initandlisten] waiting for ...
Android “Only the original thread that created a view hierarchy can touch its views.”
...he block. Include only the smallest amount of code possible, otherwise you start to defeat the purpose of the background thread.
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How do you properly determine the current script directory in Python?
...e debugger context. Also exec() is supposed to be considerably faster than starting a new process.
– sorin
Nov 22 '11 at 11:52
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