大约有 47,000 项符合查询结果（耗时：0.0417秒） [XML]
Ruby: How to get the first character of a string
...= "Smith"
first_name = "John"
Then you can get the initials very cleanly and readably:
puts first_name.initial # prints J
puts last_name.initial # prints S
The other method mentioned here doesn't work on Ruby 1.8 (not that you should be using 1.8 anymore anyway!--but when this answer was p...
乐高机器人®组件 · App Inventor 2 中文网
... Specifies the bottom of the range used for the BelowRange, WithinRange,
and AboveRange events.
ColorChangedEventEnabled
Specifies whether the ColorChanged event should fire when the DetectColor
property is set to True and the detected color changes
Mode
The current mode of the sensor. On...
Mongoose, Select a specific field with find
I'm trying to select only a specific field with
8 Answers
8
...
How can I check whether a option already exist in select by JQuery
How can I check whether a option already exist in select by JQuery?
8 Answers
8
...
Error when trying vagrant up
I'm using Vagrant for my environment and I've got a little issue:
23 Answers
23
...
Fastest exit strategy for a Panic Button in Crisis/Abuse Websites? [closed]
...on:
it is hard to click on it (you have to be accurate)
it takes time to select it (and a huge amount of time if you are on laptop without a mouse)
it saves you in history
it is accessible via back button / backspace.
And how about the panicking random moves of a woman who is trying to quickly c...
CSS Selector that applies to elements with two classes
Is there a way to select an element with CSS based on the value of the class attribute being set to two specific classes. For example, let's say I have 3 divs:
...
MySQL Select Date Equal to Today
I'm trying to run a mysql select statement where it looks at today's date and only returns results that signed up on that current day. I've currently tried the following, but it doesn't seem to work.
...
jQuery see if any or no checkboxes are selected
I know how to see if an individual checkbox is selected or not.
8 Answers
8
...
Postgres DB Size Command
..."pg_datbase" system table. Just apply the function to the names, as below.
select t1.datname AS db_name,
pg_size_pretty(pg_database_size(t1.datname)) as db_size
from pg_database t1
order by pg_database_size(t1.datname) desc;
If you intend the output to be consumed by a machine instead of a...