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How to listen for changes to a MongoDB collection?
...tricks. The key here is the oplog.
When you run MongoDB in a Replica Set, all of the MongoDB actions are logged to an operations log (known as the oplog). The oplog is basically just a running list of the modifications made to the data. Replicas Sets function by listening to changes on this oplog a...
Should MySQL have its timezone set to UTC?
...of the servers you work with then you can have everything set to UTC internally and never worry about timezones and DST.
Here are some notes I collected of how to work with timezones as a form of cheatsheet for myself and others which might influence what timezone the person will choose for his/he...
How to change JFrame icon [duplicate]
...nswers how to use the image if it's a resource. :D
– php_coder_3809625
Aug 16 '16 at 13:50
Example for the filepath: T...
Calculate business days
...case the whole interval is within a week, in the second case the interval falls in two weeks.
if ($the_first_day_of_week <= $the_last_day_of_week) {
if ($the_first_day_of_week <= 6 && 6 <= $the_last_day_of_week) $no_remaining_days--;
if ($the_first_day_of_week &l...
Fat models and skinny controllers sounds like creating God models [closed]
...ontrollers approach, esp. the Rails camp. As a result the routers is basically just figuring out what method to call on what controller and all the controller method does is call the corresponding method on the model and then bring up the view. So I've two concerns here which I don't understand:
...
What is the difference between application server and web server?
...m, that means App Server can do whatever Web Server is capable of. Additionally App Server have components and features to support Application level services such as Connection Pooling, Object Pooling, Transaction Support, Messaging services etc.
As web servers are well suited for static content and...
一分钟读懂低功耗蓝牙(BLE) MTU交换数据包 - 创客硬件开发 - 清泛IT社区，...
...: 0xf4767e
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How to customise file type to syntax associations in Sublime Text?
...h v2.x and v3.x) there is a menu command:
View -> Syntax -> Open all with current extension as ...
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querySelector and querySelectorAll vs getElementsByClassName and getElementById in JavaScript
...w what exactly is the difference between querySelector and querySelectorAll against getElementsByClassName and getElementById ?
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Download file from web in Python 3
...download_and_keep_on_memory(URL('http://statics.591.com.tw/tools/showPhone.php?info_data=rLsGZe4U%2FbphHOimi2PT%2FhxTPqI&type=rLEFMu4XrrpgEw'),
headers, # You may need this. Otherwise, some websites will send the 404 error to you.
...