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Why use Object.prototype.hasOwnProperty.call(myObj, prop) instead of myObj.hasOwnProperty(prop)?
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109
Is there any practical difference [between my examples]?
The user may have a JavaScript ob...
Approximate cost to access various caches and main memory?
...ycles etc. The second link served the following numbers:
Core i7 Xeon 5500 Series Data Source Latency (approximate) [Pg. 22]
local L1 CACHE hit, ~4 cycles ( 2.1 - 1.2 ns )
local L2 CACHE hit, ~10 cycles ( 5.3 - 3.0 ns...
How to detect the swipe left or Right in Android?
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110
Simplest left to right swipe detector:
In your activity class add following attributes:
privat...
Search and replace in bash using regular expressions
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Use sed:
MYVAR=ho02123ware38384you443d34o3434ingtod38384day
echo "$MYVAR" | sed -e 's/[a-zA-Z]/X/g' -e 's/[0-9]/N/g'
# prints XXNNNNNXXXXNNNNNXXXNNNXNNXNNNNXXXXXXNNNNNXXX
Note that the subsequent -e's are processed in order. Also, the g fl...
How to convert a file into a dictionary?
...tors.
– Mark Tolonen
Apr 2 '13 at 2:04
2
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Check if page gets reloaded or refreshed in JavaScript
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10 Answers
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Active
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Pointers vs. values in parameters and return values
... value receivers. As something nearer an upper bound, bytes.Replace takes 10 words' worth of args (three slices and an int). You can find situations where copying even large structs turns out a performance win, but the rule of thumb is not to.
For slices, you don't need to pass a pointer to change...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...ensions to implement multitouch: Rotation Detector
Xinyue Deng dengxinyue0420@gmail.com
DRAFT (March 6, 2016): Building extensions requires the App Inventor extensions capability, which is not yet incorporated into the App Inventor release. But you can try some ofary AI2 server.
You can implem...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...ensions to implement multitouch: Rotation Detector
Xinyue Deng dengxinyue0420@gmail.com
DRAFT (March 6, 2016): Building extensions requires the App Inventor extensions capability, which is not yet incorporated into the App Inventor release. But you can try some ofary AI2 server.
You can implem...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...ensions to implement multitouch: Rotation Detector
Xinyue Deng dengxinyue0420@gmail.com
DRAFT (March 6, 2016): Building extensions requires the App Inventor extensions capability, which is not yet incorporated into the App Inventor release. But you can try some ofary AI2 server.
You can implem...