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JavaScript Regular Expression Email Validation [duplicate]
This code is always alerting out "null" , which means that the string does not match the expression.
17 Answers
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Convert dictionary to list collection in C#
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Alternatively:
var keys = new List<string>(dicNumber.Keys);
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C# “as” cast vs classic cast [duplicate]
...eter, then you have two choices:
First, using a normal cast:
if(myObj is string)
{
string value = (string)myObj;
... do something
}
else if(myObj is MyClass)
{
MyClass = (MyClass)myObj;
}
This requires that you check the type of the object using is so that you don't try to cast it t...
Output array to CSV in Ruby
... "of", "CSV", "data"]
csv << ["another", "row"]
# ...
end
To a string:
require 'csv'
csv_string = CSV.generate do |csv|
csv << ["row", "of", "CSV", "data"]
csv << ["another", "row"]
# ...
end
Here's the current documentation on CSV: http://ruby-doc.org/stdlib/libdoc/...
Is it valid to define functions in JSON results?
... "basic types" supported are:
Number (integer, real, or floating
point)
String (double-quoted Unicode
with backslash escaping)
Boolean
(true and false)
Array (an ordered
sequence of values, comma-separated
and enclosed in square brackets)
Object (collection of key:value
pairs, comma-separated and...
Doctrine - How to print out the real sql, not just the prepared statement?
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Does not work when parameters are date strings like '2019-01-01'
– Darius.V
Jul 22 '19 at 15:16
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How to find elements by class
... because then stylelistrow2 will match. Better comment is "why not use string.find() instead of re?"
– FlipMcF
Mar 5 '15 at 11:52
2
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Add file extension to files with bash
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just as a note "${f%.jpg}" is bash shell string manipulation. ` ${string%substring}` Deletes shortest match of $substring from back of $string.
– Jichao
Aug 28 '15 at 19:36
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How to append text to a text file in C++?
...n't exist and also adds bit of error checks.
static void appendLineToFile(string filepath, string line)
{
std::ofstream file;
//can't enable exception now because of gcc bug that raises ios_base::failure with useless message
//file.exceptions(file.exceptions() | std::ios::failbit);
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Split delimited strings in a column and insert as new rows [duplicate]
...ble(textConnection("1|a,b,c\n2|a,c\n3|b,d\n4|e,f"), header = F, sep = "|", stringsAsFactors = F)
df
## V1 V2
## 1 1 a,b,c
## 2 2 a,c
## 3 3 b,d
## 4 4 e,f
s <- strsplit(df$V2, split = ",")
data.frame(V1 = rep(df$V1, sapply(s, length)), V2 = unlist(s))
## V1 V2
## 1 1 a
## 2 ...