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Build tree array from flat array in javascript
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As mentioned by @Sander, @Halcyon`s answer assumes a pre-sorted array, the following does not. (It does however assume you have loaded underscore.js - though it could be written in vanilla javascript):
Code
// Example usage
var arr...
Duplicate ID, tag null, or parent id with another fragment for com.google.android.gms.maps.MapFragme
...;
SupportMapFragment mapFragment = (SupportMapFragment) fm.findFragmentByTag("mapFragment");
if (mapFragment == null) {
mapFragment = new SupportMapFragment();
FragmentTransaction ft = fm.beginTransaction();
ft.add(R.id.mapFragmentContainer, mapFragment, "mapFragment"...
Array vs. Object efficiency in JavaScript
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@Moshe And thereby all discussion about performance in Javascript should be done. :P
– deceze♦
Jun 25 '13 at 11:18
10
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Finding duplicate values in MySQL
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Do a SELECT with a GROUP BY clause. Let's say name is the column you want to find duplicates in:
SELECT name, COUNT(*) c FROM table GROUP BY name HAVING c > 1;
This will return a result with the name value in the first column, and a count of ho...
How do I update an entity using spring-data-jpa?
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Identity of entities is defined by their primary keys. Since firstname and lastname are not parts of the primary key, you cannot tell JPA to treat Users with the same firstnames and lastnames as equal if they have different userIds.
So, if you want to upda...
What does “for” attribute do in HTML tag?
... for use with checkboxes and buttons, since it means you can check the box by clicking on the associated text instead of having to hit the box itself.
Read more about this element in MDN.
share
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i...
Ordering by the order of values in a SQL IN() clause
I am wondering if there is away (possibly a better way) to order by the order of the values in an IN() clause.
13 Answers
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Can I query MongoDB ObjectId by date?
... I am using nodejs with mongodbnative. Fixed the "not defined error" by including var ObjectId = require('mongodb').ObjectID;
– peter
Mar 18 '13 at 6:35
1
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Typing Enter/Return key using Python and Selenium?
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JAVA
driver.findElement(By.id("Value")).sendKeys(Keys.RETURN);
OR,
driver.findElement(By.id("Value")).sendKeys(Keys.ENTER);
PYTHON
from selenium.webdriver.common.keys import Keys
driver.find_element_by_name("Value").send_keys(Keys.RETURN)
OR,
dr...
What's the difference between an id and a class?
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.Biology {
color: red;
}
Or you can give rules to a Specific Student, by calling his unique ID:
"Jonathan Sampson is to wear a green shirt tomorrow."
#JonathanSampson {
color: green;
}
In this case, Jonathan Sampson is receiving two commands: one as a student in the Biology class, and...