Undo git pull, how to bring repos to old state
Is there any way to revert or undo git pull so that my source/repos will come to old state that was before doing git pull ? I want to do this because it merged some files which I didn't want to do so,...
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- 5 Dec at 17:42
What should be in my .gitignore for an Android Studio project?
What files should be in my `.gitignore` for an Android Studio project? I've seen several examples that all include `.iml` but IntelliJ docs say that `.iml` must be included in your source control.
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- 19 May at 14:42
What is the difference between the remap, noremap, nnoremap and vnoremap mapping commands in Vim?
What is the difference between the `remap`, `noremap`, `nnoremap` and `vnoremap` mapping commands in Vim?
How can I pass arguments to a batch file?
I need to pass an ID and a password to a batch file at the time of running rather than hardcoding them into the file. Here's what the command line looks like: ``` test.cmd admin P@55w0rd > test-log....
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- 30 Jan at 10:3
How and when to use ‘async’ and ‘await’
From my understanding one of the main things that [async and await](https://learn.microsoft.com/en-us/dotnet/csharp/async) do is to make code easy to write and read - but is using them equal to spawni...
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- 28 Sep at 20:12
How can I declare and use Boolean variables in a shell script?
I tried to declare a Boolean variable in a shell script using the following syntax: ``` variable=$false variable=$true ``` Is this correct? Also, if I wanted to update that variable would I use th...
How can I create a two dimensional array in JavaScript?
I have been reading online and some places say it isn't possible, some say it is and then give an example and others refute the example, etc. 1. How do I declare a 2 dimensional array in JavaScript...
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- 20 Apr at 02:52
How can I remove duplicate rows?
I need to remove duplicate rows from a fairly large SQL Server table (i.e. 300,000+ rows). The rows, of course, will not be perfect duplicates because of the existence of the `RowID` identity field. ...
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- 16 Aug at 15:54
How to copy a dictionary and only edit the copy
I set `dict2 = dict1`. When I edit `dict2`, the original `dict1` also changes. Why? ``` >>> dict1 = {"key1": "value1", "key2": "value2"} >>> dict2 = dict1 >>> dict2["key2"] = "WHY?!" >>> dict1 {'key2'...
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- 10 Apr at 10:46
Asynchronous vs synchronous execution. What is the difference?
What is the difference between asynchronous and synchronous execution?
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- 25 Sep at 04:49
Multiline string literal in C#
Is there an easy way to create a multiline string literal in C#? Here's what I have now: ``` string query = "SELECT foo, bar" + " FROM table" + " WHERE id = 42"; ``` I know PHP has ``` <<<BLOCK ...
Which MySQL data type to use for storing boolean values
Since MySQL doesn't seem to have any 'boolean' data type, which data type do you 'abuse' for storing true/false information in MySQL? Especially in the context of writing and reading from/to a PHP sc...
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- 4 May at 19:39
How to drop rows of Pandas DataFrame whose value in a certain column is NaN
I have this `DataFrame` and want only the records whose `EPS` column is not `NaN`: ``` >>> df STK_ID EPS cash STK_ID RPT_Date 601166 20111231 601166 NaN NaN ...
Trim string in JavaScript
How do I remove all whitespace from the start and end of the string?
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- 13 Jun at 01:47
Convert JS object to JSON string
If I defined an object in JS with: ``` var j={"name":"binchen"}; ``` How can I convert the object to JSON? The output string should be: ``` '{"name":"binchen"}' ```
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- 16 Oct at 15:42
What does "static" mean in C?
I've seen the word `static` used in different places in C code; is this like a static function/class in C# (where the implementation is shared across objects)?
How do I determine the size of my array in C?
How do I determine the size of my array in C? That is, the number of elements the array can hold?
pg_config executable not found
I am having trouble installing psycopg2. I get the following error when I try to `pip install psycopg2`: ``` Error: pg_config executable not found. Please add the directory containing pg_config to t...
Altering a column: null to not null
I have a table that has several nullable integer columns. This is undesirable for several reasons, so I am looking to update all nulls to 0 and then set these columns to `NOT NULL`. Aside from changi...
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- 15 Dec at 07:23
"Notice: Undefined variable", "Notice: Undefined index", "Warning: Undefined array key", and "Notice: Undefined offset" using PHP
I'm running a PHP script and continue to receive errors like: > Notice: Undefined variable: my_variable_name in C:\wamp\www\mypath\index.php on line 10Notice: Undefined index: my_index C:\wamp\www\myp...
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- 24 Feb at 13:1
jQuery document.createElement equivalent?
I'm refactoring some old JavaScript code and there's a lot of DOM manipulation going on. ``` var d = document; var odv = d.createElement("div"); odv.style.display = "none"; this.OuterDiv = odv; var ...
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- 22 Jan at 20:18
Git merge hotfix branch into feature branch
Let’s say we have the following situation in Git: 1. A created repository: mkdir GitTest2 cd GitTest2 git init 2. Some modifications in the master take place and get committed: echo "On Master" > fi...
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- 15 Apr at 07:41
Difference between JOIN and INNER JOIN
Both these joins will give me the same results: ``` SELECT * FROM table JOIN otherTable ON table.ID = otherTable.FK ``` vs ``` SELECT * FROM table INNER JOIN otherTable ON table.ID = otherTable.FK...
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- 19 Apr at 13:43
Getting key with maximum value in dictionary?
I have a dictionary where keys are strings, and values are integers. ``` stats = {'a': 1, 'b': 3000, 'c': 0} ``` How do I get the key with the maximum value? In this case, it is `'b'`. --- Is ther...
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- 9 Apr at 09:53
How can I list the tables in a SQLite database file that was opened with ATTACH?
What SQL can be used to list the tables, and the rows within those tables in an SQLite database file - once I have attached it with the `ATTACH` command on the SQLite 3 command line tool?