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mongodb: insert if not exists
...u want to do an "upsert". MongoDB has built-in support for this. Pass an extra parameter to your update() call: {upsert:true}. For example:
key = {'key':'value'}
data = {'key2':'value2', 'key3':'value3'};
coll.update(key, data, upsert=True); #In python upsert must be passed as a keyword argumen...
Can I change the checkbox size using CSS?
...xt size
You can control the aspect, the color, the size of the checkbox
No extra HTML needed !
Only 3 lines of CSS needed (the last one is just to give you ideas)
Edit:
As pointed out in the comment, the checkbox won't be accessible by key navigation. You should probably add tabindex=0 as a proper...
pythonic way to do something N times without an index variable?
...lds an improvement of approximately 30% over the standard for loop and an extra 19% over Martelli's.
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SQL keys, MUL vs PRI vs UNI
...------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+---------+------+-----+---------+-------+
| foo | int(11) | YES | | NULL | |
+-------+---------+------+-----+---------+-------+
1 row in set (0.00 sec)
A table with one column and an index o...
How do I size a UITextView to its content?
...PostText.contentSize.height;
self.mainPostText.frame = _f;
It fixes the "extra line" problem on 6+.
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How to print to console when using Qt
...t useful:
#include <QTextStream>
QTextStream out(stdout);
foreach(QString x, strings)
out << x << endl;
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The simplest way to comma-delimit a list?
...
Java 8 and later
Using StringJoiner class :
StringJoiner joiner = new StringJoiner(",");
for (Item item : list) {
joiner.add(item.toString());
}
return joiner.toString();
Using Stream, and Collectors:
return list.stream().
map(Object...
Best practice for Django project working directory structure
...s.py
templatetags/
__init__.py
templatetag_extras.py
gulpfile.js
manage.py
requirements.txt
I think this:
settings.py
settings_dev.py
settings_production.py
is better than this:
settings/__init__.py
settings/base.py
settings/d...
Optimising Android application before release [closed]
...g
recycle complex java objects such as XmlPullParserFactory/BitmapFactory/StringBuilder/Matcher etc.
For more battery tricks see Coding for Life - Battery Life, That Is.
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What does multicore assembly language look like?
...few tweaks to make it work on gem5, so you can experiment with performance characteristics as well.
I haven't tested it on real hardware, so and I'm not sure how portable this is. The following Raspberry Pi bibliography might be of interest:
https://github.com/bztsrc/raspi3-tutorial/tree/a3f069b7...