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Trending in Stackoverflow

See what the Stackoverflow community is most excited about today.

Date: 2018-01-02

  1. How do I delete (unset) an exported environment variable?

    tags: linux, environment-variables, unset

    967 votes, 3 answers and 547486 views

    \r\n Before installing gnuplot I set the environment variable GNUPLOT_DRIVER_DIR = /home/gnuplot/build/src.\n\nDuring the installation something went wrong; now I want to remove the GNUPLOT_DRIVER_DIR ...\r\n

  2. How can Python iterate over dictionaries with 'for' loops using only the dict keys?

    tags: python, python-2.7, dictionary, key, iteration

    1657 votes, 12 answers and 2233477 views

    \r\n I am a bit puzzled by the following code:\n\nd = {'x': 1, 'y': 2, 'z': 3} \nfor key in d:\n print key, 'corresponds to', d[key]\r\nWhat I don't understand is the key portion. How does Python recognize ...\r\n

  3. How can you validate an email address in JavaScript?

    tags: javascript, regex, validation, email, email-validation

    2814 votes, 65 answers and 1906030 views

    \r\n How can an email address be validated in JavaScript?\r\n

  4. SQL query to select dates between two dates

    tags: sql, sql-server, tsql, datetime, sql-server-2005

    184 votes, 19 answers and 1195748 views

    \r\n I have a start_date and end_date. I want to get the list of dates in between these two dates. Can anyone help me pointing the mistake in my query.\n\nselect Date,TotalAllowance \nfrom Calculation \nwhere ...\r\n

  5. Create an empty list in python with certain size

    tags: python, list

    216 votes, 8 answers and 527814 views

    \r\n I want to create an empty list (or whatever is the best way) that can hold 10 elements.\n\nAfter that I want to assign values in that list, for example this is supposed to display 0 to 9:\n\ns1 = list();\n...\r\n

  6. Python date string to date object

    tags: python, date

    206 votes, 7 answers and 224447 views

    \r\n How do I convert a string to a date object in python? \n\nThe string would be: "24052010" (corresponding to the format: "%d%m%Y")\n\nI don't want a datetime.datetime object, but rather a datetime.date\r\n

  7. How to store custom objects in NSUserDefaults

    tags: iphone, objective-c, encoding, nsuserdefaults

    238 votes, 7 answers and 119026 views

    \r\n Alright, so I've been doing some poking around, and I realize my problem, but I don't know how to fix it. I have made a custom class to hold some data. I make objects for this class, and I need to ...\r\n

  8. getWidth() and getHeight() of View returns 0

    tags: java, android, android-layout, getter

    330 votes, 8 answers and 216966 views

    \r\n I am creating all of the elements in my android project dynamically. I am trying to get the width and height of a button so that I can rotate that button around. I am just trying to learn how to work ...\r\n

  9. What are the uses of the exec command in shell scripts?

    tags: shell, unix, exec

    182 votes, 2 answers and 204064 views

    \r\n Can anyone explain what are the uses of the exec command in shell scripting with simple examples?\r\n

  10. Disable link using css

    tags: html, css

    666 votes, 15 answers and 865988 views

    \r\n Is there any way to disable a link using CSS?\n\nI have a class called current-page and want links with this class to be disabled so that no action occurs when they are clicked.\r\n