大约有 44,000 项符合查询结果（耗时：0.0490秒） [XML]
Error handling in C code
...
I like the error as return-value way. If you're designing the api and you want to make use of your library as painless as possible think about these additions:
store all possible error-states in one typedef'ed enum and use it in your lib. Don't just return ints...
`elif` in list comprehension conditionals
Can we use elif in list comprehension?
6 Answers
6
...
Pandas conditional creation of a series/dataframe column
...
If you only have two choices to select from:
df['color'] = np.where(df['Set']=='Z', 'green', 'red')
For example,
import pandas as pd
import numpy as np
df = pd.DataFrame({'Type':list('ABBC'), 'Set':list('ZZXY')})
df['col...
Detecting when a div's height changes using jQuery
...a plugin, actually it is a simple function written as a jQuery plugin.. so if you want.. strip off the plugin specfic code and use the core functions.
Note: This code doesn't use polling
check out this simple demo http://jsfiddle.net/aD49d/
$(function () {
var prevHeight = $('#test').height(...
Easy way to test a URL for 404 in PHP?
...
If you are using PHP's curl bindings, you can check the error code using curl_getinfo as such:
$handle = curl_init($url);
curl_setopt($handle, CURLOPT_RETURNTRANSFER, TRUE);
/* Get the HTML or whatever is linked in $url. *...
Checking if a SQL Server login already exists
I need to check if a specific login already exists on the SQL Server, and if it doesn't, then I need to add it.
10 Answers
...
How to check if a number is between two values?
In JavaScript, I'm telling the browser to do something if the window size is greater than 500px. I do it like so:
7 Answers...
Ternary operator (?:) in Bash
...
ternary operator ? : is just short form of if/else
case "$b" in
5) a=$c ;;
*) a=$d ;;
esac
Or
[[ $b = 5 ]] && a="$c" || a="$d"
share
|
improve this an...
When is finally run if you throw an exception from the catch block?
...lock is executed)
editing this 7 years later - one important note is that if e is not caught by a try/catch block further up the call stack or handled by a global exception handler, then the finally block may never execute at all.
...
How to tell if node.js is installed or not
...ind further instructions. What does one really need to do? I wanted to see if it was actually working. So I executed a script called hello.js. It went as such:
...