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Why not use java.util.logging?
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Disclaimer: I am the founder of log4j, SLF4J and logback projects.
There are objective reasons for preferring SLF4J. For one, SLF4J allows the end-user the liberty to choose the underlying logging framework. In addition, savvier users tend to prefer logback which offe...
mailto link multiple body lines
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Thanks, this worked well for me and seems much simpler than other solutions floating around on the internet.
– bryn
Feb 9 '13 at 9:02
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Position of least significant bit that is set
...hed. My favourite solution for your problem (from that site) is «multiply and lookup»:
unsigned int v; // find the number of trailing zeros in 32-bit v
int r; // result goes here
static const int MultiplyDeBruijnBitPosition[32] =
{
0, 1, 28, 2, 29, 14, 24, 3, 30, 22, 20, 15, 25, 17...
Slicing of a NumPy 2d array, or how do I extract an mxm submatrix from an nxn array (n>m)?
...ce a NumPy nxn array. I want to extract an arbitrary selection of m rows and columns of that array (i.e. without any pattern in the numbers of rows/columns), making it a new, mxm array. For this example let us say the array is 4x4 and I want to extract a 2x2 array from it.
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Delete all tags from a Git repository
...sophy where you pipe everything. On Windows use git bash with the same command.
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Rename a dictionary key
...ay to rename a dictionary key, without reassigning its value to a new name and removing the old name key; and without iterating through dict key/value?
In case of OrderedDict, do the same, while keeping that key's position.
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Awk学习笔记 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...ile scriptfile
从脚本文件中读取awk命令。
-mf nnn and -mr nnn
对nnn值设置内在限制，-mf选项限制分配给nnn的最大块数目；-mr选项限制记录的最大数目。这两个功能是Bell实验室版awk的扩展功能，在标准awk中不适用。
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How do I get a PHP class constructor to call its parent's parent's constructor?
I need to have a class constructor in PHP call its parent's parent's (grandparent?) constructor without calling the parent constructor.
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Appending a vector to a vector [duplicate]
Assuming I have 2 standard vectors:
4 Answers
4
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Split data frame string column into multiple columns
... stringr::str_split_fixed
library(stringr)
str_split_fixed(before$type, "_and_", 2)
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