大约有 43,000 项符合查询结果（耗时：0.0565秒） [XML]
Rails 3 check if attribute changed
...ns an array of the attributes changed for that object.
Both @user.changed and attrs are arrays so I can get the intersection (see ary & other ary method). The result of the intersection is an array. By calling any? on the array, I get true if there is at least one intersection.
Also very usefu...
How to delete a character from a string using Python
...
Given that the questioner is brand new to python, it might be worth noting that while in version 2.X python the "/" operator returns an integer (truncated towards zero), in version 3.X python you should use "//" instead. Also, the line from __future__ impo...
How to convert a string Date to long millseconds
...rs posted in 2016 also use the then long outdated classes SimpleDateFormat and Date is a bit more of a mystery to me. java.time, the modern Java date and time API also known as JSR-310, is so much nicer to work with. You can use it on Android through the ThreeTenABP, see this question: How to use Th...
Selecting all text in HTML text input when clicked
...ke that more general, you could use this.id as the argument for the click handler. Better yet, you could eliminate the getElementById entirely and pass this as an argument.
– Asad Saeeduddin
Dec 14 '12 at 23:05
...
C/C++ NaN constant (literal)?
...
@MikeSeymour Not by the language standard but as far as I know it should work if the compiler claims to be IEEE compliant.
– Pixelchemist
May 22 '13 at 12:23
...
Variable interpolation in the shell
...
What is the difference between using ${} and double quotes? Should I prefer one over the other?
– user31389
Mar 10 '18 at 10:49
3
...
Find element's index in pandas Series
... answer. How can I get the index of certain element of a Series in python pandas? (first occurrence would suffice)
10 Answe...
What is the best alternative IDE to Visual Studio [closed]
...I've only ever used Visual Studio for .NET development, I would like to expand my horizons and see what else there is on offer as an alternative to it. So what in your opinion is the best alternative to Visual Studio? Is there a viable alternative?
...
Postgresql not creating db with “createdb” as superuser, yet not outputting errors [duplicate]
...
createdb is a command line utility which you can run from bash and not from psql.
To create a database from psql, use the create database statement like so:
create database [databasename];
Note: be sure to always end your SQL statements wi...
Permission denied for relation
I tried to run simple sql command:
10 Answers
10
...