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iOS开发过程中的各种tips - 更多技术 - 清泛网 - 专注C/C++及内核技术
...ion {
if (keyboardShown) {
return;
}
NSDictionary *info = [notification userInfo];
NSValue *aValue = [info objectForKey:UIKeyboardFrameBeginUserInfoKey];
CGSize keyboardSize = [aValue CGRectValue].size;
CGRect viewFrame = scrollView.frame;
viewFrame.size...
Build and Version Numbering for Java Projects (ant, cvs, hudson)
... subversion revision number, time, user who ran the build, and some system information, stuff them into a .properties file that gets included in the application jar, and read that jar at runtime.
The ant code looks like this:
<!-- software revision number -->
<property name="version" valu...
How to estimate how much memory a Pandas' DataFrame will need?
...gt; df.memory_usage(deep=True).sum()
(gives results in bytes)
462432
df.info()
Prints dataframe info to stdout. Technically these are kibibytes (KiB), not kilobytes - as the docstring says, "Memory usage is shown in human-readable units (base-2 representation)." So to get bytes would multiply by...
Do AJAX requests retain PHP Session info?
...r page request. They are both HTTP requests, and they both contain cookie information in the header in the same way.
From the client side, the same cookies will always be sent to the server whether it's a regular request or an AJAX request. The Javascript code does not need to do anything special...
What does passport.session() middleware do?
...d deserializeUser methods. The express middleware will restore the session info, but that's not necessarily related to how passport is managing the user info. That has to be done after the session is rehydrated by express.
– Josh C.
Feb 26 '14 at 20:57
...
Render HTML to PDF in Django site
...ger):
def __handle_exception(self, exception_root, exception_id, exec_info ):
type, value, traceback = exec_info
raise JasperServerClientError(exception_root, exception_id), None, traceback
# 01: REPORT-METADATA
# get resource description to generate the report
d...
How to create index on JSON field in Postgres?
...
Found:
CREATE TABLE publishers(id INT, info JSON);
CREATE INDEX ON publishers((info->>'name'));
As stated in the comments, the subtle difference here is ->> instead of ->. The former one returns the value as text, the latter as a JSON object.
...
jQuery Call to WebService returns “No Transport” error
...
A bit more info here: blueonionsoftware.com/…
– Andrew Arnott
Jun 22 '11 at 1:19
14
...
Where are Docker images stored on the host machine?
...s.
/var/lib/docker/repositories-aufs is a JSON file containing local image information. This can be viewed with the command docker images.
In the case of devicemapper:
/var/lib/docker/devicemapper/devicemapper/data stores the images
/var/lib/docker/devicemapper/devicemapper/metadata the metadata...
Is git's semi-secret empty tree object reliable, and why is there not a symbolic name for it?
...-02-13, Git v1.5.5-rc0 -- merge), and the function now known as oid_object_info() was taught the empty tree in c4d9986f5f ("sha1_object_info: examine cached_object store too", 2011-02-07, Git v1.7.4.1).
Note, you will see that SHA1 pop up on some GitHub repo when the author wants its first co...