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Will ConfigurationManager.AppSettings[“blah”] throw an exception if “blah” doesn't exist?
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From the MSDN documentation for NameValueCollection.Item Property (String):
Caution
This property returns null in the following cases: 1) if the specified key is not found; and 2) if the specified key is found and its associated value is null. This pro...
Get “Internal error in the expression evaluator” on “Add watch” function when trying to debug WCF se
...mpatibility mode, without globally disabling it (e.g. per-project). More information here: https://devblogs.microsoft.com/devops/switching-to-managed-compatibility-mode-in-visual-studio-2013/
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Exit a Script On Error
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Are you looking for exit?
This is the best bash guide around.
http://tldp.org/LDP/abs/html/
In context:
if jarsigner -verbose -keystore $keyst -keystore $pass $jar_file $kalias
then
echo $jar_file signed sucessfully
else
echo ERRO...
How to use the ProGuard in Android Studio?
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You can configure your build.gradle file for proguard implementation. It can be at module level or the project level.
buildTypes {
debug {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
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JRuby on Rails vs. Ruby on Rails, what's difference?
... looking to try out JRuby and JRuby on Rails. I'm having trouble finding information on what's difference between JRuby on Rails and Ruby on Rails.
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How can I build multiple submit buttons django form?
I have form with one input for email and two submit buttons to subscribe and unsubscribe from newsletter:
5 Answers
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How to trim leading and trailing white spaces of a string?
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For example,
package main
import (
"fmt"
"strings"
)
func main() {
s := "\t Hello, World\n "
fmt.Printf("%d %q\n", len(s), s)
t := strings.TrimSpace(s)
fmt.Printf("%d %q\n", len(t), t)
}
Output:
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Extract elements of list at odd positions
... will be:
2, 4, 6
Explanation
The [1::2] at the end is just a notation for list slicing. Usually it is in the following form:
some_list[start:stop:step]
If we omitted start, the default (0) would be used. So the first element (at position 0, because the indexes are 0-based) would be selected....
Symfony 2: How do I check if a user is not logged in inside a template?
...stead. See Symfony2 doc : symfony.com/doc/current/book/…. Also available for Silex : silex.sensiolabs.org/doc/providers/…
– Ronan
Oct 1 '13 at 10:04
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What does ON [PRIMARY] mean?
...e SQL you've given creates your table ON the PRIMARY file group.
See MSDN for the full syntax.
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