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Rails detect if request was AJAX
...rb(main):005:0> /asfd/ =~ 'haystack'
=> nil
It's based on this:
# File actionpack/lib/action_dispatch/http/request.rb, line 220
def xml_http_request?
@env['HTTP_X_REQUESTED_WITH'] =~ /XMLHttpRequest/
end
so
env['HTTP_X_REQUESTED_WITH'] =~ /XMLHttpRequest/ => 0
The docs:
http:/...
How do I install package.json dependencies in the current directory using npm
...here. These will be placed in ./node_modules relative to your package.json file (it's actually slightly more complex than this, so check the npm docs here).
You are free to move the node_modules dir to the parent dir of your app if you want, because node's 'require' mechanism understands this. Howe...
How can I create a “Please Wait, Loading…” animation using jQuery?
... of a spinning circle from Ajaxload - stick that somewhere in your website file heirarchy. Then you just need to add an HTML element with the correct code, and remove it when you're done. This is fairly simple:
function showLoadingImage() {
$('#yourParentElement').append('<div id="loading-im...
Is it possible to reopen a closed branch in Mercurial?
...l && hg update branch_name
Now make a small change to one of the file and then commit it
hg commit -m "minor change"
then push it
hg push -b .
Now you should be able to work normally.
share
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C/C++中的段错误（Segmentation fault） - C/C++ - 清泛网 - 专注C/C++及内核技术
... b 8 --用b(break)设置断点
Breakpoint 1 at 0x80483b7: file segerr.c, line 8.
(gdb) p i --用p(print)打印变量i的值[看到没，这里i的值是0哦]
$1 = 0
(gdb) r --用r(run)运行，直到断点处
Starting program: /home/falco...
Difference between len() and .__len__()?
..._()
'an inch'
>>> len(bah())
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: 'str' object cannot be interpreted as an integer
When you see a call to the len built-in, you're sure that, if the program continues after that rather than raising ...
How do I handle the window close event in Tkinter?
...())
# create a menu bar with an Exit command
menubar = tkinter.Menu(root)
filemenu = tkinter.Menu(menubar, tearoff=0)
filemenu.add_command(label="Exit", command=root.destroy)
menubar.add_cascade(label="File", menu=filemenu)
root.config(menu=menubar)
# create a Text widget with a Scrollbar attached...
vertical alignment of text element in SVG
Let's say I have the SVG file:
5 Answers
5
...
How to run cron once, daily at 10pm
...ing from terminal -type:
zee$ crontab -e
what you will add to crontab file:
0 22 * * 0 some-user /opt/somescript/to/run.sh
What it means:
[
+ user => 'some-user',
+ minute => ‘0’, <<= on top of the hour.
+ hour => '22', <<= at 10 PM....
How to post JSON to PHP with curl
...the $_POST-array isn't populated is correct. However, you can use
$data = file_get_contents("php://input");
to just retrieve the http body and handle it yourself. See PHP input/output streams.
From a protocol perspective this is actually more correct, since you're not really processing http mult...