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Difference between JSONObject and JSONArray
...en dealing with JSON that begins with curly braces. A JSON object is typically used to contain key/value pairs related to one item.
For example: {"name": "item1", "description":"a JSON object"}
Of course, JSON arrays and objects may be nested inside one another. One common example of this is an A...
What are the differences between the BLOB and TEXT datatypes in MySQL?
...nstead of using blob or text ? because in memory calculating, varchar is really simple, for example create table website( website_name varchar(30) ) and then we fill the website_name "stackoverflow" so the memory needed is 13byte
– nencor
Jul 24 '12 at 9:36
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Reasons that the passed Intent would be NULL in onStartCommand
...of function.
Edit: Ok, I found it in the documentation of START_STICKY of all places! "if there are not any pending start commands to be delivered to the service, it will be called with a null intent object, so you must take care to check for this."
http://developer.android.com/reference/android/a...
Usage of @see in JavaDoc?
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* Works like {@link #methodB}, but ...
*/
When the fact that methodA calls methodB is an implementation detail and there is no real relation from the outside, you don't need a link here.
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Bash conditionals: how to “and” expressions? (if [ ! -z $VAR && -e $VAR ])
...te easily handle empty strings. If that's what you want then you don't actually need the -z non-empty check:
pax> VAR=xyzzy
pax> if [[ -e $VAR ]] ; then echo yes ; fi
pax> VAR=/tmp
pax> if [[ -e $VAR ]] ; then echo yes ; fi
yes
In other words, just use:
if [[ -e "$var" ]] ; then
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Floating elements within a div, floats outside of div. Why?
...t, and poorly implemented piece of technology. In fact, this reasoning actually explains a lot of html/css quirks you've no doubt encountered since you made this post.
– Slight
Apr 23 '15 at 16:01
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Returning redirect as response to XHR request
...rect (aka a 302 response plus a Location: header) the redirect is automatically followed by the browser. The response to the second request (assuming it also isn't another redirect) is what is exposed to your program.
In fact, you don't have the ability to detect whether a 302 response has occurred...
Cleanest way to write retry logic?
Occasionally I have a need to retry an operation several times before giving up. My code is like:
29 Answers
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How to convert a file into a dictionary?
...t by normal execution flow or by an exception) there file will be automatically closed. You can read more about context-managers in Python here: effbot.org/zone/python-with-statement.htm
– Vlad H
Jan 26 '11 at 11:49
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Significant new inventions in computing since 1980
... +1 for the most obvious but also the most easily forgotten because we all take it for granted :)
– PolyThinker
Jan 11 '09 at 15:22
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