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updating table rows in postgres using subquery
...ress_id;
This syntax is not standard SQL, but it is much more convenient for this type of query than standard SQL. I believe Oracle (at least) accepts something similar.
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Find the index of a dict within a list, by matching the dict's value
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tom_index = next((index for (index, d) in enumerate(lst) if d["name"] == "Tom"), None)
# 1
If you need to fetch repeatedly from name, you should index them by name (using a dictionary), this way get operations would be O(1) time. An idea:
def bui...
In Flux architecture, how do you manage Store lifecycle?
I'm reading about Flux but the example Todo app is too simplistic for me to understand some key points.
3 Answers
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SQL RANK() versus ROW_NUMBER()
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ROW_NUMBER : Returns a unique number for each row starting with 1. For rows that have duplicate values,numbers are arbitarily assigned.
Rank : Assigns a unique number for each row starting with 1,except for rows that have duplicate values,in which case the same...
How may I reference the script tag that loaded the currently-executing script?
... custom attribute to the script tag
id attribute may cause weird behaviour for scripts in some browsers for some edge cases
3. Select the script using a data-* attribute
Giving the script a data-* attribute will let you easily select it from within.
<script data-name="myscript">
var me = ...
PHP Session Fixation / Hijacking
...s is where an attacker explicitly sets the session identifier of a session for a user. Typically in PHP it's done by giving them a url like http://www.example.com/index...?session_name=sessionid. Once the attacker gives the url to the client, the attack is the same as a session hijacking attack.
T...
How to delete an object by id with entity framework
It seems to me that I have to retrieve an object before I delete it with entity framework like below
9 Answers
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How can I update window.location.hash without jumping the document?
... @DavidCook - We could also use history.replaceState (which, for hash changes, might make more sense) to avoid the need for a popstate event listener.
– Jack
Sep 6 '14 at 0:38
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Hibernate JPA Sequence (non-Id)
Is it possible to use a DB sequence for some column that is not the identifier/is not part of a composite identifier ?
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What is a JavaBean exactly?
...ass -- a class is a JavaBean if it follows the standards.
There is a term for it because the standard allows libraries to programmatically do things with class instances you define in a predefined way. For example, if a library wants to stream any object you pass into it, it knows it can because yo...