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Number of processors/cores in command line

... nproc is what you are looking for. More here : http://www.cyberciti.biz/faq/linux-get-number-of-cpus-core-command/ share | improve this answer | follow ...
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BLE(二)信道&数据包&协议栈格式 - 创客硬件开发 - 清泛IT社区,...

文章源自:https://www.gandalf.site/2018/11/ble_23.html 参考低功耗蓝牙(BLE)安全初探 0x1 信道BLE的物理通道即“频道,分别是‘f=2402+k*2 MHz, k=0, … ,39’,带宽为2MHz”的40个RF Channel。 其中,有3个信道是advertising channel(广播通道)...
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Rails 3 - can't install pg gem

... have it, download typing this in your terminal: ruby -e "$(curl -fsSL https://raw.github.com/Homebrew/homebrew/go/install)" share | improve this answer | follow ...
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When to use PNG or JPG in iPhone development?

...ould consider crushing the PNGs on the server before the download. http://www.cocoanetics.com/2011/10/avoiding-image-decompression-sickness/ share | improve this answer | fo...
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Location Services not working in iOS 8

... According to the Apple docs: https://developer.apple.com/documentation/corelocation/requesting_permission_to_use_location_services https://developer.apple.com/documentation/corelocation/cllocationmanager/1620562-requestwheninuseauthorization As of iOS ...
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Long vs Integer, long vs int, what to use and when?

...ent (even unclear) memory-sizes of the primitive types: Java - all clear: https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html byte, char .. 1B .. 8b short int .. 2B .. 16b int .. .. .. .. 4B .. 32b long int .. 8B .. 64b C .. just mess: https://en.wikipedia.org/wiki/C_data_...
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In-memory size of a Python structure

... "How big is this complex object in memory?" There's a great answer here: https://goshippo.com/blog/measure-real-size-any-python-object/ The punchline: import sys def get_size(obj, seen=None): """Recursively finds size of objects""" size = sys.getsizeof(obj) if seen is None: ...
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Verify if a point is Land or Water in Google Maps

...by adding pixels. function isItWatter($lat,$lng) { $GMAPStaticUrl = "https://maps.googleapis.com/maps/api/staticmap?center=".$lat.",".$lng."&size=40x40&maptype=roadmap&sensor=false&zoom=12&key=YOURAPIKEY"; //echo $GMAPStaticUrl; $chuid = curl_init(); curl_seto...
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How do you unit test a Celery task?

...import current_app def send_task(name, args=(), kwargs={}, **opts): # https://github.com/celery/celery/issues/581 task = current_app.tasks[name] return task.apply(args, kwargs, **opts) current_app.send_task = send_task ...
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What does the [Flags] Enum Attribute mean in C#?

... Combining answers https://stackoverflow.com/a/8462/1037948 (declaration via bit-shifting) and https://stackoverflow.com/a/9117/1037948 (using combinations in declaration) you can bit-shift previous values rather than using numbers. Not necess...