dollar-sign Questions
3
Solved
Being completely new to PL/pgSQL, what is the meaning of double dollar signs in this function:
CREATE OR REPLACE FUNCTION check_phone_number(text)
RETURNS boolean AS $$
BEGIN
IF NOT $1 ~ e'^\\+\\d...
Truett asked 27/8, 2012 at 14:46
3
Solved
I am trying to write a $ sign in a Text
Text("Refer and Win 10 000 $")
I get an error
What is the correct way to write this?
Immix asked 8/6, 2018 at 18:0
2
Solved
I use django-money, then I have price field with MoneyField() in Product model as shown below:
# "app/models.py"
from django.db import models
from djmoney.models.fields import MoneyField...
Svend asked 11/7, 2018 at 6:10
2
Solved
IntelliJ shows a warning "Unresolved function or method $()" when mouse over the $ sign despite the file is in the same directory as js file. So I can't take advantage of intellisense when typing $...
Lissome asked 4/5, 2016 at 22:2
5
Solved
How can I extract all words in a string that start with the $ sign? For example in the string
This $string is an $example
I want to extract the words $string and $example.
I tried with this reg...
Ettieettinger asked 10/7, 2012 at 15:30
5
Solved
I've been learning Python, and I keep running into the $ character in online documentation. Usually it goes something like this:
$ python ez_setup.py (Yeah, I've been trying to install setup tools...
Cachet asked 14/11, 2013 at 19:13
10
Solved
I have a vector of different column names and I want to be able to loop over each of them to extract that column from a data.frame. For example, consider the data set mtcars and some variable names...
Lafountain asked 14/8, 2013 at 2:27
2
Solved
Given the following bar chart:
import numpy as np
import matplotlib.pyplot as plt
import pandas as pd
df = pd.DataFrame({'A': ['A', 'B'], 'B': [1000,2000]})
fig, ax = plt.subplots(1, 1, figsize=(...
Ascription asked 1/7, 2016 at 19:1
2
I'm trying to run a post build command in CMake 3.1.1 via:
ADD_CUSTOM_COMMAND(
TARGET mytarget
POST_BUILD
COMMAND for i in `ls *` \; do echo \$i \; done \;
However, the $i variable is evalua...
Portraiture asked 11/4, 2015 at 23:48
1
Solved
What is the meaning of the dollar character/symbol prefix before property names in Vue.js?
For example: this.$emit('clicked', 'demo')
Trescott asked 4/7, 2019 at 6:22
2
Solved
I've recently encountered these two variables in some Velocity code:
$!variable1
!$variable2
I was surprised by the similarity of these so I became suspicious about the correctness of the code a...
Fluter asked 31/8, 2018 at 8:56
6
Solved
I was working with the developer tools of google chrome on a page without jQuery (or any other library that uses the $ sign as a shortcut).
When I inspected $ by the console (by just typing it in a...
Fireback asked 2/8, 2012 at 13:29
5
Solved
Been playing with Ruby on Rails for awhile and decided to take a look through the actual source. Grabbed the repo from GitHub and started looking around. Came across some code that I am not sure wh...
Syncretism asked 13/12, 2009 at 15:53
1
Solved
$ is allowed in a custom operator, but if you try to use $$, <$> or for instance ~$% as operator name you will receive the following error:
error FS0035: This construct is deprecated: '$' ...
Pelvis asked 23/12, 2016 at 19:23
1
Solved
I can't figure out how to display dollar signs in tick labels that are not numbers, but strings.
Here's an example of what I mean:
import matplotlib.pyplot as plt
import numpy as np
categories ...
Monobasic asked 27/10, 2016 at 20:54
4
Solved
In Bash, there appear to be several variables which hold special, consistently-meaning values. For instance,
./myprogram &; echo $!
will return the PID of the process which backgrounded myprog...
Limelight asked 2/3, 2011 at 3:42
3
Solved
I have this sample code to create a new data frame 'new_data' from the existing data frame 'my_data'.
new_data = NULL
n = 10 #this number correspond to the number of rows in my_data
conditions = c...
Laxative asked 12/9, 2012 at 13:29
2
When you are writing slightly more complex functions I notice that $ is used a lot but I don't have a clue what it does?
Hypoderm asked 22/10, 2013 at 14:51
2
Solved
I find a piece of code like this
int a = 100;
string str = $"{a:0.00}";
Console.WriteLine(str);
the result is "100.00"
The $ have the same function of string.Format, and I want to know which v...
Macedonia asked 28/2, 2016 at 4:48
2
Solved
I have the following list
test_list=list(list(a=1,b=2),list(a=3,b=4))
and I want to extract all elements with list element name a.
I can do this via
sapply(test_list,`[[`,"a")
which gives me...
Ummersen asked 31/12, 2015 at 10:21
1
Solved
Consider a directory containing (only) the 3 files obtained by:
echo "foobar" > test1.txt
echo "\$foobar" > test2.txt
echo "\$\$foobar" > test3.txt
(and thus containing respectively foo...
Abutilon asked 23/11, 2015 at 14:44
1
I am aware that the issue involving the dollar sign "$" in regex (here: either in PHP and JavaScript) has been discussed numerous times before: Yes, I know that I need to add a backslash "\" in fro...
Nationwide asked 30/9, 2015 at 17:0
6
Solved
A quick question, is there an operator in Haskell that works like the dollar sign but gives precedence to the left hand side. I.E. instead of
f (x 1)
being written as
f $ x 1
I'd like to write i...
Quartziferous asked 3/11, 2010 at 18:8
1
Solved
CREATE OR REPLACE FUNCTION increment(i integer) RETURNS integer AS $$
BEGIN
RETURN i + 1;
END;
$$ LANGUAGE plpgsql;
The above code is taken from the Postgresql website. However I do not unders...
Uird asked 8/7, 2015 at 6:47
2
Solved
Websocket snippet has a statement that has dollar sign inside closed parens like this,
any ($ fst client)
Since haskellers use $ sign instead of parens, why do we need parens here?
Why is...
Unsearchable asked 17/4, 2015 at 18:4
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