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Get keys from HashMap in Java
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A HashMap contains more than one key. You can use keySet() to get the set of all keys.
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() ) {
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Allow user to select camera or gallery for image
...r both original intents and create the final list of possible Intents with one new Intent for each retrieved activity like this:
List<Intent> yourIntentsList = new ArrayList<Intent>();
List<ResolveInfo> listCam = packageManager.queryIntentActivities(camIntent, 0);
for (ResolveInf...
Rename multiple files based on pattern in Unix
...re are several ways, but using rename will probably be the easiest.
Using one version of rename:
rename 's/^fgh/jkl/' fgh*
Using another version of rename (same as Judy2K's answer):
rename fgh jkl fgh*
You should check your platform's man page to see which of the above applies.
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Understanding Spliterator, Collector and Stream in Java 8
...lit off part of the collection, e.g. because you're parallelizing and want one thread to work on one part of the collection, one thread to work on another part, etc.
You should essentially never be saving values of type Stream to a variable, either. Stream is sort of like an Iterator, in that it's...
Validation failed for one or more entities. See 'EntityValidationErrors' property for more details [
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To be honest I don't know how to check the content of the validation errors. Visual Studio shows me that it's an array with 8 objects, so 8 validation errors.
Actually you should see the errors if you drill into that array in Visu...
What do “branch”, “tag” and “trunk” mean in Subversion repositories?
...tags, once created, are immutable (at least to "ordinary" users). This is done via the hook scripts, which enforce the immutability by preventing further changes if tag is a parent node of the changed object.
Subversion also has added features, since version 1.5, relating to "branch merge tracking"...
How to use null in switch
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cleaner way than using one extra if else
– Vivek Agrawal
Nov 15 '19 at 10:28
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How can I get selector from jQuery object
...on">Button test</button>
</div>
<ul>
<li>Item one
<ul>
<li id="sub2" >Sub one</li>
<li id="sub2" class="subitem otherclass">Sub two</li>
</ul>
</li>
</ul>
</body>
</html>
For example, if ...
Can I run multiple versions of Google Chrome on the same machine? (Mac or Windows)
...er suggests there’s no way to run multiple versions of Google Chrome on one machine.
11 Answers
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How to “properly” print a list?
...element of mylist, creating a new list of strings that is then joined into one string with str.join(). Then, the % string formatting operator substitutes the string in instead of %s in "[%s]".
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