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How to install multiple python packages at once using pip
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Do you have to specify the version #? In other words, if you just put Django on one line, would it automatically install the latest version?
– Jon Grah
Sep 15 '19 at 5:07
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How to make the first option of selected with jQuery
...ent option 2 then child option 3 I do not want that to "stick". In other words the user then selects parent #1, then re-selects parent #2. When that happens I want the child menu to reset to the first option (which is "Any" in my case). All the other solutions here fail on Firefox v19 and Chrome...
Does PHP have threading?
...g isn't like using a new database, close attention should be paid to every word in the manual and examples shipped with pthreads.
Lastly, from the PHP manual:
pthreads was, and is, an experiment with pretty good results. Any of its limitations or features may change at any time; that is the nat...
Replace a character at a specific index in a string?
...har[])valueField.get(text);
//The 13rd character is the "s" of the word "Test"
value[12]='x';
//We display the string which should be "This is a text"
System.out.println(text);
} catch (NoSuchFieldException | SecurityException e) {
e.printStackTrace();
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Check if bash variable equals 0 [duplicate]
...e brackets are smarter about preserving unset/null variables as a separate word in the expression.
– glenn jackman
Oct 26 '12 at 14:44
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Should I use px or rem value units in my CSS? [closed]
... the px unit so that its size matches that of a reference pixel. In other words, this rescaling is exactly why 1 CSS pixel equals 2 physical Retina display pixels.
That said, up until 2010 (and the mobile zoom situation notwithstanding), the px almost always did equal one physical pixel, because a...
Math - mapping numbers
...ply by the ratio and add the starting value of your second range. In other words,
R = (20 - 10) / (6 - 2)
y = (x - 2) * R + 10
This evenly spreads the numbers from the first range in the second range.
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How to select option in drop down using Capybara
...ect, from, options).find(:option, value, options).select_option
In other words, it finds the <select> you're interested in, then finds the <option> within that, then calls select_option on the <option> node.
You've already pretty much done the first two things, I'd just rearrang...
How do I create a dynamic key to be added to a JavaScript object variable [duplicate]
...e case the object involved happens to be an array is unimportant, in other words.
When setting property values using [ ], the story is the same except for the special behavior around maintaining the length property. If you set a property with a numeric key on an array instance:
myArray[200] = 5;
th...
Remove Primary Key in MySQL
...ed your direct question. Just a side note: Maybe this is just some awkward wording on your part, but you seem to be under the impression that you have three primary keys, one on each field. This is not the case. By definition, you can only have one primary key. What you have here is a primary key th...