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Echo tab characters in bash script
...t as well for the example you're asking about; you just need to put double quotes around the argument:
echo "[$res]"
as kmkaplan wrote (two and a half years ago, I just noticed!). The problem with your original commands:
res=' 'x # res = "\t\tx"
echo '['$res']' # expect [\t\tx]
isn'...
Count how many files in directory PHP
... Although useful it wasn't very easy to read when i asked the question. Saying that though, I have improved my knowledge of php. I have no upvoted this.
– Bradly Spicer
Nov 4 '13 at 16:11
...
How to play an android notification sound
...title controller already set. What does it mean?
– Deqing
May 11 '14 at 11:20
...
Unstaged changes left after git reset --hard
... @NLwino, git rm .gitattributes removes .gitattributes from the index. git add -A adds all (including the removal of .gitattributes) to the index, which should then only be the removal of .gitattributes, if that was really the problem. git reset --hard resets all uncommitted changes, whic...
Create dynamic URLs in Flask with url_for()
...f the route','parameters (if required)')
It can be used as:
@app.route('/index')
@app.route('/')
def index():
return 'you are in the index page'
Now if you have a link the index page:you can use this:
<a href={{ url_for('index') }}>Index</a>
You can do a lot o stuff with it, f...
Converting any string into camel case
...camelize(str) {
return str.replace(/(?:^\w|[A-Z]|\b\w)/g, function(word, index) {
return index === 0 ? word.toLowerCase() : word.toUpperCase();
}).replace(/\s+/g, '');
}
camelize("EquipmentClass name");
camelize("Equipment className");
camelize("equipment class name");
camelize("Equipment C...
How to reset a single table in rails?
...
To reset the index/primary key in SQLite just type:
$ rails console
> ActiveRecord::Base.connection.execute("DELETE from sqlite_sequence where name = 'yourtablename'")
...
Why use multiple columns as primary keys (composite primary key)
..." link is particularly stupid, the info is self-serving and false. 2) The index on the columns that make the row unique cannot be avoided. A "surrogate" ID with an index is always an additional column and an additional index. Rather silly because it is redundant. And slower.
–...
Why is SELECT * considered harmful?
...st and weren't needed when the original consumers coded their data access.
Indexing issues. Consider a scenario where you want to tune a query to a high level of performance. If you were to use *, and it returned more columns than you actually needed, the server would often have to perform more ex...
What is a handle in C++?
...
A handle can be anything from an integer index to a pointer to a resource in kernel space. The idea is that they provide an abstraction of a resource, so you don't need to know much about the resource itself to use it.
For instance, the HWND in the Win32 API is a h...