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Capture characters from standard input without waiting for enter to be pressed
... comes up so infrequently for me. But in C or C++, what is the best way to read a character from standard input without waiting for a newline (press enter).
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乐高机器人®组件 · App Inventor 2 中文网
...gle or rotation speed based on current mode,
or -1 if the value cannot be read from sensor.
EV3马达
A component that provides both high- and low-level interfaces to
control the motors on LEGO MINDSTORMS EV3.
属性
BluetoothClient
Specifies the BluetoothClient component that should b...
When to use volatile with multi threading?
If there are two threads accessing a global variable then many tutorials say make the variable volatile to prevent the compiler caching the variable in a register and it thus not getting updated correctly.
However two threads both accessing a shared variable is something which calls for protection v...
Split string into an array in Bash
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IFS=', ' read -r -a array <<< "$string"
Note that the characters in $IFS are treated individually as separators so that in this case fields may be separated by either a comma or a space rather than the sequence of the two c...
Volatile vs Static in Java
...value for all objects and volatile means one copy of the value for all threads?
8 Answers
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How to calculate md5 hash of a file using javascript
...plementations of the MD5 algorithm, older browsers are generally unable to read files from the local filesystem.
I wrote that in 2009. So what about new browsers?
With a browser that supports the FileAPI, you *can * read the contents of a file - the user has to have selected it, either with an <...
When and why are database joins expensive?
...e the rows are materialised.
Materialising the result involves bulk disk reads which are the most expensive aspect of the exercise by an order of magnitude. Performing a join, by contrast, logically requires retrieval of only the keys. In practice, not even the key values are fetched: the key hash...
How to write a simple database engine [closed]
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If you're good at reading code, studying SQLite will teach you a whole boatload about database design. It's small, so it's easier to wrap your head around. But it's also professionally written.
http://sqlite.org/
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How can I access the MySQL command line with XAMPP for Windows?
... mysql), else it would not see mysql.exe (yes, I had done the cd command already).
– dotNET
Nov 29 '19 at 18:46
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Typedef function pointer?
...n given above.
The difficulty lies in the pointer to functions syntax and readability in C and C++, and the typedef can improve the readability of such declarations. However, the syntax is appropriate, since functions - unlike other simpler types - may have a return value and parameters, thus the s...