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Create RegExps on the fly using string variables
... so the regex I'd need is /\b[term]\B/, but when constructing it I need to call new RegExp("\\b"+ term + "\\B"). Small but important difference, and hard to spot since using it as a regex directly does work as expected.
– Byson
Jan 6 '15 at 14:17
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or (HTML5)
...TML5Doctor post on nav with a section on how it's different from menu (basically, use it in actual apps). Looks like you want nav.
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Using bitwise OR 0 to floor a number
...rst learned about it). It's faster if for no other reason because it's not calling a function on the Math object, a function that could at anytime be replaced as in Math.floor = function(...).
– gman
May 8 '17 at 4:03
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Remove duplicated rows
...moval, either from specific columns/variables (as in this question) or considering all columns/variables. dplyr is part of the tidyverse.
Data and package
library(dplyr)
dat <- data.frame(a = rep(c(1,2),4), b = rep(LETTERS[1:4],2))
Remove rows duplicated in a specific column (e.g., columna)
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How do I create a namespace package in Python?
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There's a standard module, called pkgutil, with which you
can 'append' modules to a given namespace.
With the directory structure you've provided:
Package-1/namespace/__init__.py
Package-1/namespace/module1/__init__.py
Package-2/namespace/__init__.py...
Using the last-child selector
...ode:
$(function(){
$("#nav li:last-child").css("border-bottom","1px solid #b5b5b5")
})
You can find more info about here : http://api.jquery.com/css/#css2
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Django-DB-Migrations: cannot ALTER TABLE because it has pending trigger events
...and PostgreSQL), RunPython operations do not have any transactions automatically added besides the transactions created for each migration. Thus, on PostgreSQL, for example, you should avoid combining schema changes and RunPython operations in the same migration or you may hit errors like Operationa...
Convert data.frame column format from character to factor
...sn't work if length(col_names)==1. In that case, df[,col_names] is automatically demoted to a vector instead of a list of length 1, and then lapply tries to operate over each entry rather than the column as a whole. This can be prevented by using df[,col_names,drop=FALSE].
– P ...
Java Persistence / JPA: @Column vs @Basic
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that 'non-lazy', calls EAGER. LOL
– solvator
Feb 21 '14 at 5:16
7
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How to un-escape a backslash-escaped string?
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Basically for Python3 you want print(b"Hello,\nworld!".decode('unicode_escape'))
– ChristopheD
Apr 7 '15 at 8:35
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