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Postgresql query between date ranges
...
With dates (and times) many things become simpler if you use >= start AND < end.
For example:
SELECT
user_id
FROM
user_logs
WHERE
login_date >= '2014-02-01'
AND login_date < '2014-03-01'
In this case you still need to calculate the start date of the month you nee...
How to set environment variables in Python?
...van's reference above, Such changes to the environment affect subprocesses started with os.system(), popen() or fork() and execv(). In other words, keep in mind that this approach won't modify the way your program is running, only the way your program's children run. True, your program can set and...
Selenium wait until document is ready
...ait if you like, I find them ugly):
def wait_for(condition_function):
start_time = time.time()
while time.time() < start_time + 3:
if condition_function():
return True
else:
time.sleep(0.1)
raise Exception('Timeout waiting for {}'.format(condit...
When to use self over $this?
...
This answer would be even better if you started with a general rule rather than an exception. It's a matter of style, not of technical expertise. This is the best example I've ever seen of the difference between self:: and $this->, but it's a shame to hide that ...
ASP.NET MVC: No parameterless constructor defined for this object
...have to create a parameterless one... I can understand that like: once you start defined a constructor, the system does not take the risk to create 'default objects' because it does not know if it makes sense... something like that.
– H_He
Jul 28 '14 at 11:52
...
How to check if a python module exists without importing it
...is not None
This also works with relative imports but you must supply the starting
package, so you could also do:
import importlib
spam_spec = importlib.util.find_spec("..spam", package="eggs.bar")
found = spam_spec is not None
spam_spec.name == "eggs.spam"
While I'm sure there exists a reason for...
How to set caret(cursor) position in contenteditable element (div)?
...cument.createRange()
var sel = window.getSelection()
range.setStart(el.childNodes[2], 5)
range.collapse(true)
sel.removeAllRanges()
sel.addRange(range)
}
<div id="editable" contenteditable="true">
text text text<br>text text text<br>text text text&l...
Permission denied on accessing host directory in Docker
...ere the host uid/gid may change per developer, my preferred solution is to start the container with an entrypoint running as root, fix the uid/gid of the user inside the container to match the host volume uid/gid, and then use gosu to drop from root to the container user to run the application insid...
Relational Database Design Patterns? [closed]
...n Color With UML provides an "archetype" driven process of entity modeling starting from the premise that there are 4 core archetypes of any object/data model
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What is the purpose of the Visual Studio Hosting Process?
...erver and ASP.NET. Hosting allows one to configure the CLR before it gets started. One primary use of this is configuring the primary AppDomain and setting up custom security policies. Which is exactly what the hosting process is doing.
A good example of a custom CLR host is available in this qu...