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How to drop columns using Rails migration
What's the syntax for dropping a database table column through a Rails migration?
20 Answers
...
Remove specific characters from a string in Python
...
Strings in Python are immutable (can't be changed). Because of this, the effect of line.replace(...) is just to create a new string, rather than changing the old one. You need to rebind (assign) it to line in order to have that variable take the new...
WITH (NOLOCK) vs SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED
...se the set transaction isolation level statement, it will apply to all the tables in the connection, so if you only want a nolock on one or two tables use that; otherwise use the other.
Both will give you dirty reads. If you are okay with that, then use them. If you can't have dirty reads, then co...
How to align 3 divs (left/center/right) inside another div?
...ide another div.
#container {
display: flex; /* establish flex container */
flex-direction: row; /* default value; can be omitted */
flex-wrap: nowrap; /* default value; can be omitted */
justify-content: space-between; /* switched from defau...
Storing integer values as constants in Enum manner in java [duplicate]
...ation protocol which you can't change, or the enums represent columns in a table, etc).
In almost all cases I suggest using an EnumMap instead. It decouples the components more completely, if that was the concern, or if the enums represent column indices or something similar, you can easily make c...
Create list of single item repeated N times
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Create List of Single Item Repeated n Times in Python
Immutable items
For immutable items, like None, bools, ints, floats, strings, tuples, or frozensets, you can do it like this:
[e] * 4
Note that this is best only used with immutable items (strings, tuples, frozensets, ) in th...
CSS Div stretch 100% page height
...
It's simple using a table:
<html>
<head>
<title>100% Height test</title>
</head>
<body>
<table style="float: left; height: 100%; width: 200px; border: 1px solid red">
<tbody>
...
Get Specific Columns Using “With()” Function in Laravel Eloquent
I have two tables, User and Post . One User can have many posts and one post belongs to only one user .
13 Answe...
What is difference between sjlj vs dwarf vs seh?
...are placed in xdata-section and there is the .pdata
(function descriptor table) instead of the stack. For win32, the chain
of handlers are on stack and need to be saved/restored by real
executed code.
GCC GNU about Exception Handling:
GCC supports two methods for exception handling (EH):...