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Default filter in Django admin
... in Django admin, the filter is by default set to 'All' but I want to set it to pending by default.
15 Answers
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How to subtract X days from a date using Java calendar?
... to subtract 5 days from the current time of the calendar, you can achieve it by calling:
Calendar calendar = Calendar.getInstance(); // this would default to now
calendar.add(Calendar.DAY_OF_MONTH, -5).
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Why do python lists have pop() but not push()
...ast element (that indexed at -1) and list.append semantic is consistent with that use?
10 Answers
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Use LINQ to get items in one List, that are not in another List
...ut could introduce performance issues, and especially if the data set is quite large. If this doesn't satisfy your performance requirements, you may need to evaluate other options. Since the stated requirement is for a solution in LINQ, however, those options aren't explored here. As always, evaluat...
object==null or null==object?
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This is probably a habit learned from C, to avoid this sort of typo (single = instead of a double ==):
if (object = null) {
The convention of putting the constant on the left side of == isn't really useful in Java since Java requires that the e...
How can I read a text file without locking it?
I have a windows service writes its log in a text file in a simple format.
7 Answers
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Is there an MD5 Fixed Point where md5(x) == x?
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Since an MD5 sum is 128 bits long, any fixed point would necessarily also have to be 128 bits long. Assuming that the MD5 sum of any string is uniformly distributed over all possible sums, then the probability that any given 128-bit string is a fixe...
Is there any particular difference between intval and casting to int - `(int) X`?
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@moose that page states $i++ is incorrect in red. But it should be slower!!
– Shiplu Mokaddim
Feb 26 '12 at 1:09
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Arduino Sketch upload issue - avrdude: stk500_recv(): programmer is not responding
I have an Arduino Duemilanove with an ATmega328 . I am working on Ubuntu 12.04 (Precise Pangolin), and the Arduino IDE's version is 1.0. Recently, I tried to upload a few of the sample sketches onto it, such as the Blink one. However, none of my attempts are working and they result in the same e...
How to match “anything up until this sequence of characters” in a regular expression?
...e most popular ones that can be considered "complete".
/.+?(?=abc)/
How it works
The .+? part is the un-greedy version of .+ (one or more of
anything). When we use .+, the engine will basically match everything.
Then, if there is something else in the regex it will go back in steps
tr...