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Can't seem to discard changes in Git
...t-checkout, GIT-CHECKOUT(1)):
-f, --force
Proceed even if the index or the working tree differs from HEAD.
This is used to throw away local changes.
For instance, discard changes on the current branch and switch to a different branch:
git checkout -f master
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Explanation of JSONB introduced by PostgreSQL
...son.
If you do a lot of operations on the JSON value in PostgreSQL, or use indexing on some JSON field, you should use jsonb.
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Responsive web design is working on desktop but not on mobile device
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make sure the production index.html actually includes the tag as well as development index.html
– halafi
Mar 4 '18 at 9:56
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Strange behavior for Map, parseInt [duplicate]
...alue = parseInt(string[, radix]);
while map handler's second argument is index:
... callback is invoked with three arguments: the value of the element,
the index of the element, and the Array object being traversed.
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Programmatically Lighten or Darken a hex color (or rgb, and blend colors)
Here is a function I was working on to programmatically lighten or darken a hex color by a specific amount. Just pass in a string like "3F6D2A" for the color ( col ) and a base10 integer ( amt ) for the amount to lighten or darken. To darken, pass in a negative number (i.e. -20 ).
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Loading Backbone and Underscore using RequireJS
...d, im posting this as of Feb 2014.)
Make sure you included script in your index.html
<!-- build:js({app,.tmp}) scripts/main.js -->
<script data-main="scripts/main" src="bower_components/requirejs/require.js"></script>
<!-- endbuild -->
Then, in main.js
require.config({
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How to delete a certain row from mysql table with same column values?
... table. But if there is not.
I will give other ways:
By creating Unique index
I see id_users and id_product should be unique in your example.
ALTER IGNORE TABLE orders ADD UNIQUE INDEX unique_columns_index (id_users, id_product)
These will delete duplicate rows with same data.
But if you st...
What is a NullReferenceException, and how do I fix it?
...mbers = null;
int n = numbers[0]; // numbers is null. There is no array to index.
Array Elements
Person[] people = new Person[5];
people[0].Age = 20 // people[0] is null. The array was allocated but not
// initialized. There is no Person to set the Age for.
Jagged Arrays
long[][...
How to parse XML to R data frame
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Data in XML format are rarely organized in a way that would allow the xmlToDataFrame function to work. You're better off extracting everything in lists and then binding the lists together in a data frame:
require(XML)
data <- xmlParse("http://forecast.weather.gov/MapClick.php?lat=...
Why do C and C++ compilers allow array lengths in function signatures when they're never enforced?
...he first dimension [10] is ignored; the compiler will not prevent you from indexing off the end (notice that the formal wants 10 elements, but the actual provides only 2). However, the size of the second dimension [20] is used to determine the stride of each row, and here, the formal must match the...