55
votes
25
answers
2.4K
views
How to evaluate a math expression given in string form?
I'm trying to write a Java routine to evaluate math expressions from String values like: "5+3" "10-40" "(
54
votes
6
answers
2.5K
views
How to find the length of a string in R
How to find the length of a string (number of characters in a string) without splitting it in R? I know how to
54
votes
12
answers
1.9K
views
How can two strings be concatenated?
How can I concatenate (merge, combine) two values? For example I have: tmp = cbind("GAD", "AB") tmp # [,
63
votes
6
answers
444
views
How to concat string + i?
for i=1:N f(i) = 'f'+i; end gives an error in MatLab. What's the correct syntax to initial
52
votes
8
answers
1.3K
views
How to search for a string in cell array in MATLAB?
Let's say I have the cell array strs = {'HA' 'KU' 'LA' 'MA' &ap
54
votes
22
answers
3K
views
Extract substring in Bash
Given a filename in the form someletters_12345_moreleters.ext, I want to extract the 5 digits and put them int
58
votes
21
answers
906
views
How to convert a string to lower case in Bash?
Is there a way in bash to convert a string into a lower case string? For example, if I have: a="Hi all" I
51
votes
26
answers
2K
views
How to check if a string contains a substring in Bash
I have a string in Bash: string="My string" How can I test if it contains another string? if [ $string ?? &ap
51
votes
30
answers
1.5K
views
How to concatenate string variables in Bash
In PHP, strings are concatenated together as follows: $foo = "Hello"; $foo .= " World"; Here, $foo becomes
63
votes
17
answers
3K
views
Using LINQ to concatenate strings
What is the most efficient way to write the old-school: StringBuilder sb = new StringBuilder(); if (strings.C
69
votes
13
answers
3.2K
views
How to read values from the querystring with ASP.NET Core?
I'm building one RESTful API using ASP.NET Core MVC and I want to use querystring parameters to specify f
48
votes
7
answers
2.3K
views
Convert UTF-8 encoded NSData to NSString
I have UTF-8 encoded NSData from windows server and I want to convert it to NSString for iPhone. Since data co
55
votes
30
answers
1K
views
How do I test if a string is empty in Objective-C?
How do I test if an NSString is empty in Objective-C?
57
votes
14
answers
491
views
61
votes
14
answers
1.3K
views
Constants in Objective-C
I'm developing a Cocoa application, and I'm using constant NSStrings as ways to store key names for
63
votes
23
answers
2.2K
views
How do I check if a string contains another string in Objective-C?
How can I check if a string (NSString) contains another smaller string? I was hoping for something like: NSS
61
votes
21
answers
2.2K
views
Multiline strings in VB.NET
Is there a way to have multiline strings in VB.NET like Python a = """ multi line string """ or PHP? $a =
54
votes
12
answers
1.4K
views
Is String.Format as efficient as StringBuilder
Suppose I have a stringbuilder in C# that does this: StringBuilder sb = new StringBuilder(); string cat = "ca
59
votes
12
answers
1.9K
views
How do you get a string from a MemoryStream?
If I am given a MemoryStream that I know has been populated with a String, how do I get a String back out?
62
votes
17
answers
2.7K
views
Converting string to byte array in C#
I'm converting something from VB into C#. Having a problem with the syntax of this statement: if ((searc
