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How to get distinct values from an array of objects in JavaScript?
...ury. Instead, try this:
var flags = [], output = [], l = array.length, i;
for( i=0; i<l; i++) {
if( flags[array[i].age]) continue;
flags[array[i].age] = true;
output.push(array[i].age);
}
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How to get the pure text without HTML element using JavaScript?
...d, and figured the OP needed a little handholding. it still is good enough for any application for which the HTML source is already known not to contain unbalanced angle brackets.
– jcomeau_ictx
Aug 29 '16 at 23:39
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Android List Preferences: have summary as selected value?
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The simplest way to do this is just to have Android do it for you. Assuming you want the summary to match the selected value, you can simply set the summary of the ListPreference to "%s" using either XML or the setSummary method in Java. For example:
<ListPreference
androi...
How to create JSON string in C#
...ssume you would just use a stringbuilder to build the JSON string and them format your response as JSON?
14 Answers
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hadoop No FileSystem for scheme: file
... breaking things.
Why this happened to us
Different JARs (hadoop-commons for LocalFileSystem, hadoop-hdfs for DistributedFileSystem) each contain a different file called org.apache.hadoop.fs.FileSystem in their META-INFO/services directory. This file lists the canonical classnames of the filesyste...
Xcode Debugger: view value of variable
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This was perfect for finding computed properties' values too. Thanks!
– Paula Hasstenteufel
May 31 '17 at 12:14
add a...
How to filter object array based on attributes?
...nd >= with a string and number
// will coerce the string to a number before comparing.)
var newArray = obj.homes.filter(function (el) {
return el.price <= 1000 &&
el.sqft >= 500 &&
el.num_of_beds >= 2 &&
el.num_of_baths >= 1.5...
Logging levels - Logback - rule-of-thumb to assign log levels
...ntervention.
info: things we want to see at high volume in case we need to forensically analyze an issue. System lifecycle events (system start, stop) go here. "Session" lifecycle events (login, logout, etc.) go here. Significant boundary events should be considered as well (e.g. database calls, ...
Textarea onchange detection
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You will need to use onkeyup and onchange for this. The onchange will prevent context-menu pasting, and the onkeyup will fire for every keystroke.
See my answer on How to impose maxlength on textArea for a code sample.
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Where are Docker images stored on the host machine?
...the /var/lib/docker directory vary depending on the driver Docker is using for storage.
By default this will be aufs but can fall back to overlay, overlay2, btrfs, devicemapper or zfs depending on your kernel support. In most places this will be aufs but the RedHats went with devicemapper.
You ca...