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Subtract two variables in Bash
...xpr $FIRSTV - $SECONDV`
Be aware of the exit status:
The exit status is 0 if EXPRESSION is neither null nor 0, 1 if EXPRESSION is null or 0.
Keep this in mind when using the expression in a bash script in combination with set -e which will exit immediately if a command exits with a non-zero stat...
Why can't I overload constructors in PHP?
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edited Jun 5 '13 at 0:45
answered Feb 1 '10 at 7:15
A...
Java String remove all non numeric characters
Trying to remove all letters and characters that are not 0-9 and a period. I'm using Character.isDigit() but it also removes decimal, how can I also keep the decimal?
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How to add local jar files to a Maven project?
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edited May 10 '19 at 7:54
Gerold Broser
10.3k44 gold badges3232 silver badges7878 bronze badges
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Getting a slice of keys from a map
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209
For example,
package main
func main() {
mymap := make(map[int]string)
keys := make([]...
How to populate/instantiate a C# array with a single value?
...cally populated with the default value of the type (e.g. false for bool, 0 for int, etc.).
25 Answers
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How to enter in a Docker container already running with a new TTY
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1106
With docker 1.3, there is a new command docker exec. This allows you to enter a running contain...
How to change Hash values?
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edited May 1 '09 at 18:25
answered May 1 '09 at 18:20
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sed in-place flag that works both on Mac (BSD) and Linux
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edited Sep 19 '19 at 20:28
GabLeRoux
11.8k1111 gold badges5353 silver badges6969 bronze badges
answe...
How to create a DataTable in C# and how to add rows?
...);
DataRow _ravi = dt.NewRow();
_ravi["Name"] = "ravi";
_ravi["Marks"] = "500";
dt.Rows.Add(_ravi);
To see the structure, or rather I'd rephrase it as schema, you can export it to an XML file by doing the following.
To export only the schema/structure, do:
dt.WriteXMLSchema("dtSchemaOrStructure....