大约有 47,000 项符合查询结果（耗时：0.0722秒） [XML]
Accessing last x characters of a string in Bash
I found out that with ${string:0:3} one can access the first 3 characters of a string. Is there a equivalently easy method to access the last three characters?
...
MySQL get the date n days ago as a timestamp
In MySQL, how would I get a timestamp from, say 30 days ago?
3 Answers
3
...
str.startswith with a list of strings to test for
I'm trying to avoid using so many if statements and comparisons and simply use a list, but not sure how to use it with str.startswith :
...
SQL query to get all values a enum can have
Postgresql got enum support some time ago.
4 Answers
4
...
Position an element relative to its container
I'm trying to create a horizontal 100% stacked bar graph using HTML and CSS. I'd like to create the bars using DIVs with background colors and percentage widths depending on the values I want to graph. I also want to have a grid lines to mark an arbitrary position along the graph.
...
What's the opposite of head? I want all but the first N lines of a file
Given a text file of unknown length, how can I read, for example all but the first 2 lines of the file? I know tail will give me the last N lines, but I don't know what N is ahead of time.
...
Git fast forward VS no fast forward merge
Git merge allow us to perform fast forward and no fast fast forward branch merging. Any ideas when to use fast forward merge and when to use no fast forward merge?
...
What does the 'L' in front a string mean in C++?
Although it seems to work without the L , what is the purpose of the prefix? The way it is used doesn't even make sense to a hardcore C programmer.
...
jQuery Multiple ID selectors
Here's a snippet of the start of my code:
6 Answers
6
...
Semicolons superfluous at the end of a line in shell scripts?
I have a shell script which contains the following:
5 Answers
5
...