
Cut, cut – Reference – kdb+ and q documentation - kdb+ and q documentation
Cut is a q operator that cuts a list or table into subarrays. cut is a q keyword that cuts a list or table into a matrix into a specified number of columns.
Splitting a list of strings using cut - KDB - Stack Overflow
2018年4月12日 · Use _ to cut the string. or. For the following list: q)a: ("ua@1100@1";"sba@2220@2";"r@4444@a") I want following output : …
How do I remove the first or last n characters from a value in q ...
2017年7月18日 · I've looked into the underscore for drop/cut, but this only seems to remove the first or last n entries, not characters. Any ideas? Depends on what you're using drop cut on. …
kdb+ - Remove part of string KDB - Stack Overflow
Is there a way to remove the "." and everything before it? You can use 0: for this - it's often the best approach for lists of strings, and works particularly well for longer lists compared to using …
How do I split a list? - kdbfaq
2011年5月13日 · We can also split a list into lists of varying length by passing a list of indexes as the left argument to the _ (cut) operator: To split a list of some type other than char using a …
linux内核调试(七)使用kdb/kgdb调试内核 - 知乎
为了更加方便内核调试,社区开发了内核级的调试模块kdb和kgdb,通过它们可以实现对内核的在线调试。 其中kdb可以在本机独立运行,当需要执行调试工作时,可通过sysrq命令或按键等 …
kdb+中文教程 | kdb+ Tutorial in Chinese
kdb+/q号称是世界上最快的内存数据库,它使用统一的数据库处理实时数据和历史数据,同时具备CEP (复杂事件处理)引擎、内存数据库、磁盘数据库等功能。 与一般数据库或大数据平台相 …
KDB+ 教程
在本教程中,您将学习如何使用KDB+教程Kdb+是KxSystemsInc推出的高性能面向列的数据库。 kdb+旨在捕获、分析、比较和存储数据−一切都在高速和大量数据的情况下进行。 本教程首先 …
KDB+ 概述 | KDB+ 教程
kdb+于2003年推出,是新一代的kdb数据库,旨在捕获、分析、比较和存储数据。 kdb+系统包含以下两个组件 −. kdb+ 和 q 都是用 k 编程语言 编写的(与 q 相同,但可读性较差)。 Kdb+/q …
vs – Reference – kdb+ and q documentation - kdb+ and q documentation
Where x is a char atom or string, and y is a string, returns a list of strings: y cut using x as the delimiter. Where x is the empty symbol `, and y is a string or bytestream, returns as a list of …
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