大约有 30,000 项符合查询结果（耗时：0.0510秒） [XML]
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
...
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.
share
|
improve this answer
|
follow
...
TSQL Pivot without aggregate function
... = that value..
In this case, you could also self join 5 times on customerid, filter by dbColumnName per table reference. It may work out better.
share
|
improve this answer
|
...
How do I cast a string to integer and have 0 in case of error in the cast with PostgreSQL?
...
I was just wrestling with a similar problem myself, but didn't want the overhead of a function. I came up with the following query:
SELECT myfield::integer FROM mytable WHERE myfield ~ E'^\\d+$';
Postgres shortcuts its conditionals, so you shouldn't get any non-integers hitting ...
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
...
How can I count text lines inside an DOM element? Can I?
I'm wondering if there's a way to count lines inside a div for example. Say we have a div like so:
16 Answers
...
How do I create a namespace package in Python?
...
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...
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...
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)
...
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
share
|
improve this answer
...