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Determine if a function exists in bash
Currently I'm doing some unit tests which are executed from bash. Unit tests are initialized, executed and cleaned up in a bash script. This script usualy contains an init(), execute() and cleanup() functions. But they are not mandatory. I'd like to test if they are or are not defined.
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Does C++ support 'finally' blocks? (And what's this 'RAII' I keep hearing about?)
Does C++ support ' finally ' blocks?
16 Answers
16
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What does [nyae] mean in Zsh?
I run the following command unsuccessfully
3 Answers
3
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How to read a .xlsx file using the pandas Library in iPython?
I want to read a .xlsx file using the Pandas Library of python and port the data to a postgreSQL table.
6 Answers
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Ruby Array find_first object?
Am I missing something in the Array documentation? I have an array which contains up to one object satisfying a certain criterion. I'd like to efficiently find that object. The best idea I have from the docs is this:
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How to update a plot in matplotlib?
I'm having issues with redrawing the figure here. I allow the user to specify the units in the time scale (x-axis) and then I recalculate and call this function plots() . I want the plot to simply update, not append another plot to the figure.
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FixedThreadPool vs CachedThreadPool: the lesser of two evils
I have a program that spawns threads (~5-150) which perform a bunch of tasks. Originally, I used a FixedThreadPool because this similar question suggested they were better suited for longer lived tasks and with my very limited knowledge of multithreading, I considered the average life of the thr...
TypeScript type signatures for functions with variable argument counts
I'm having trouble defining interfaces with function members that accept variable amounts of arguments. Take the following object literal as an example:
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How do I access the command history from IDLE?
On bash or Window's Command Prompt, we can press the up arrow on keyboard to get the last command, and edit it, and press ENTER again to see the result.
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bpftrace教程【官方】 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...trace的完整参考，见bpftrace完整参考。
该教程贡献者是Brendan Gregg, Netflix (2018), 基于他的DTrace教程系列 DTrace Tutorial。
1. 列出所有探针
bpftrace -l 'tracepoint:syscalls:sys_enter_*'
"bpftrace -l" 列出所有探测点，并且可以添加搜索项。...