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Count the number occurrences of a character in a string
...ences of substring sub in the range [start, end]. Optional arguments start and end are interpreted as in slice notation.
>>> sentence = 'Mary had a little lamb'
>>> sentence.count('a')
4
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Get keys from HashMap in Java
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team1.put("foo", 1);
team1.put("bar", 2);
will store 1 with key "foo" and 2 with key "bar". To iterate over all the keys:
for ( String key : team1.keySet() ) {
System.out.println( key );
}
will print "foo" and "bar".
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Remove duplicate elements from array in Ruby
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array = array.uniq
uniq removes all duplicate elements and retains all unique elements in the array.
This is one of many beauties of the Ruby language.
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Named placeholders in string formatting
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You can set a custom VariableResolver and throw an Exception if the key isn't present in the map.
– Mene
Apr 21 '16 at 14:21
7
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How to reset a timer in C#?
...asses that I am aware of, System.Threading.Timer , System.Timers.Timer , and System.Windows.Forms.Timer , but none of these have a .Reset() function which would reset the current elapsed time to 0.
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Add spaces before Capital Letters
... work fine (I even voted up Martin Browns answer), but they are expensive (and personally I find any pattern longer than a couple of characters prohibitively obtuse)
This function
string AddSpacesToSentence(string text, bool preserveAcronyms)
{
if (string.IsNullOrWhiteSpace(text))
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How to convert a normal Git repository to a bare one?
...y that it is now a bare repository.
To do this, execute the following commands:
cd repo
mv .git ../repo.git # renaming just for clarity
cd ..
rm -fr repo
cd repo.git
git config --bool core.bare true
Note that this is different from doing a git clone --bare to a new location (see below).
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Bash variable scope
...he while loop.
Now this child process has its own copy of the environment and can't pass any
variables back to its parent (as in any unix process).
Therefore you'll need to restructure so that you're not piping into the loop.
Alternatively you could run in a function, for example, and echo the val...
How do I create some kind of table of content in GitHub wiki?
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@LB--: If you edit a GitHub wiki page and change the "editing style" dropdown to "MediaWiki", you can just use the MediaWiki __TOC__ directly. Clearly the underlying autogeneration logic is there. But the functionality doesn't seem to be exposed in their Markdown...
AppSettings get value from .config file
...embly reference to
System.Configuration
Go to your Solution Explorer and right click on References and select Add reference. Select the Assemblies tab and search for Configuration.
Here is an example of my App.config:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
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