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Bash array with spaces in elements
...ling the elements in the array, you call the indexes, which takes the full string thats wrapped in quotes.
It must be wrapped in quotes!
#!/bin/bash
Unix[0]='Debian'
Unix[1]='Red Hat'
Unix[2]='Ubuntu'
Unix[3]='Suse'
for i in $(echo ${!Unix[@]});
do echo ${Unix[$i]};
done
Then you'll get:
D...
Collection was modified; enumeration operation may not execute
...have a class (_dictionary obj below) that contains a generic Dictionary<string,int> named MarkerFrequencies, but doing this didn't instantly solve the crash: lock (_dictionary.MarkerFrequencies) { foreach (KeyValuePair<string, int> pair in _dictionary.MarkerFrequencies) {...} }
...
Why are the Level.FINE logging messages not showing?
...design does get to you, if one has been writing loggers that simply dumped strings into a file, console etc.
– Vineet Reynolds
Jun 11 '11 at 12:19
...
How to deal with “java.lang.OutOfMemoryError: Java heap space” error?
... the Java class that has a runnable main (that is "public static void main(String[] args)"), then choose Run As - Run Configuration. Then "Arguments" is the tab right after the Main (you see the tabs Main, Arguments, JRE, Classpath, Source, Environment, Common).
– CuongHuyTo
...
Aggregate / summarize multiple variables per group (e.g. sum, mean)
...reshape2 package for this task:
require(reshape2)
df_melt <- melt(df1, id = c("date", "year", "month"))
dcast(df_melt, year + month ~ variable, sum)
# year month x1 x2
1 2000 1 -80.83405 -224.9540159
2 2000 2 -223.76331 -288.2418017
3 2000 3 -188.83930 -481.560...
Getting the class name from a static method in Java
...ard-code in knowledge of MyClass like that, then you might as well just do String name = "MyClass"; !
– John Topley
Jun 1 '09 at 20:45
111
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variable === undefined vs. typeof variable === “undefined”
...
For undeclared variables, typeof foo will return the string literal "undefined", whereas the identity check foo === undefined would trigger the error "foo is not defined".
For local variables (which you know are declared somewhere), no such error would occur, hence the identit...
What is meant by the term “hook” in programming?
...but was unable to find a good answer. Would someone be able to give me an idea of what this term generally means and perhaps a small example to illustrate the definition?
...
How do you sign a Certificate Signing Request with your Certification Authority?
...tinguished_name = ca_distinguished_name
x509_extensions = ca_extensions
string_mask = utf8only
####################################################################
[ ca_distinguished_name ]
countryName = Country Name (2 letter code)
countryName_default = US
stateOrProvinceName ...
How to set an iframe src attribute from a variable in AngularJS
...ction AppCtrl($scope, $sce) {
// ...
$scope.setProject = function (id) {
$scope.currentProject = $scope.projects[id];
$scope.currentProjectUrl = $sce.trustAsResourceUrl($scope.currentProject.url);
}
}
In the Template:
<iframe ng-src="{{currentProjectUrl}}"> <!--co...