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在 App Inventor 2 中使用图像 · App Inventor 2 中文网
...sive sizing
In summary: What MIT App Inventor Programmers Should Do
Synopsis: App Inventor works best if you use images whose size matches the size you want them to appear on your screen. If you import larger images into your app, your app may run out of system memory.
1. Out of memo...
How do I print a list of “Build Settings” in Xcode project?
...er
APPLE_INTERNAL_DIR /AppleInternal
APPLE_INTERNAL_DOCUMENTATION_DIR /AppleInternal/Documentation
APPLE_INTERNAL_LIBRARY_DIR /AppleInternal/Library
APPLE_INTERNAL_TOOLS /AppleInternal/Developer/Tools
APPLY_RULES_IN_COPY_FILES ...
Using git repository as a database backend
I'm doing a project that deals with structured document database. I have a tree of categories (~1000 categories, up to ~50 categories on each level), each category contains several thousands (up to, say, ~10000) of structured documents. Each document is several kilobytes of data in some structured f...
Is it possible to disable floating headers in UITableView with UITableViewStylePlain?
...ages etc. and I'd prefer it if they didn't float but stayed static as they do when the style is set to UITableViewStyleGrouped .
...
How to set top-left alignment for UILabel for iOS application?
...
It's fairly easy to do. Create a UILabel sublcass with a verticalAlignment property and override textRectForBounds:limitedToNumberOfLines to return the correct bounds for a top, middle or bottom vertical alignment. Here's the code:
SOLabel.h
#...
Why does pycharm propose to change method to static
...arm release (3.1.3 community edition) proposes to convert the methods that don't work with the current object's state to static.
...
iPad/iPhone hover problem causes the user to double click a link
...the mouse over events are translated in clicks...so for instance i have to do two clicks instead of one..(the first hover, than the actual click)
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How to redirect 'print' output to a file using python?
...
The most obvious way to do this would be to print to a file object:
with open('out.txt', 'w') as f:
print >> f, 'Filename:', filename # Python 2.x
print('Filename:', filename, file=f) # Python 3.x
However, redirecting stdout a...
what is the best way to convert a json formatted key value pair to ruby hash with symbol as key?
...pass in the symbolize_names option. See here: http://flori.github.com/json/doc/index.html (look under parse)
eg:
>> s ="{\"akey\":\"one\",\"bkey\":\"two\"}"
>> JSON.parse(s,:symbolize_names => true)
=> {:akey=>"one", :bkey=>"two"}
...
How to make an AJAX call without jQuery?
...anilla" JavaScript:
<script type="text/javascript">
function loadXMLDoc() {
var xmlhttp = new XMLHttpRequest();
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == XMLHttpRequest.DONE) { // XMLHttpRequest.DONE == 4
if (xmlhttp.status == 200) {
...