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How do I rename a column in a database table using SQL?
...S), you can do it with regular ALTER TABLE statement:
=> SELECT * FROM Test1;
id | foo | bar
----+-----+-----
2 | 1 | 2
=> ALTER TABLE Test1 RENAME COLUMN foo TO baz;
ALTER TABLE
=> SELECT * FROM Test1;
id | baz | bar
----+-----+-----
2 | 1 | 2
...
Why does isNaN(“ ”) (string with spaces) equal false?
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JavaScript interprets an empty string as a 0, which then fails the isNAN test. You can use parseInt on the string first which won't convert the empty string to 0. The result should then fail isNAN.
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How remove word wrap from textarea?
...glish source is here) that says IE 4.0 and Netscape 2.0 support it. I also tested it in FF 3.0.7 where it works as supposed. Things have changed here, SELFHTML is now a wiki and the english source link is dead.
EDIT2: If you want to be sure every browser supports it, you can use CSS to change wrap ...
How to impose maxlength on textArea in HTML using JavaScript
...');
for(var i = 0, l = txts.length; i < l; i++) {
if(/^[0-9]+$/.test(txts[i].getAttribute("maxlength"))) {
var func = function() {
var len = parseInt(this.getAttribute("maxlength"), 10);
if(this.value.length > len) {
alert('Maximum length exceeded: ...
How to run a PowerShell script
...
Type:
powershell -executionpolicy bypass -File .\Test.ps1
NOTE: Here Test.ps1 is the PowerShell script.
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byte[] to hex string [duplicate]
... of each of the methods listed here for the hell of it. I based the speed testing code off this.
The result is that BitConverter+String.Replace seems to be faster than most other simple ways. But the speed can be improved with algorithms like Nathan Moinvaziri's ByteArrayToHexString or Kurt's ToH...
How do I remove the “extended attributes” on a file in Mac OS X?
I have an AppleScript script that runs a stress test. Part of the test is to open, save, and close certain files. Somehow, the files have picked up some "extended attributes" that prohibit the files from being saved. That causes the stress test to fail.
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Check/Uncheck checkbox with JavaScript (jQuery or vanilla)?
...h Jquery 1.11.2 in Firefox with locally hosted files. .attr does. I've not tested more fully. Here's the code: ``` personContent.find("[data-name='" + pass.name + "']").children('input').attr('checked', true); ```
– Andrew Downes
Mar 27 '15 at 10:27
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What is a 'semantic predicate' in ANTLR?
...ignore spaces
WhiteSpace
: (' ' | '\t' | '\r' | '\n') {skip();}
;
Testing
The grammar can be tested with the following class:
import org.antlr.runtime.*;
public class Main {
public static void main(String[] args) throws Exception {
ANTLRStringStream in = new ANTLRStringStream...
How to convert R Markdown to PDF?
...umid you might have missed the up-to-date part (well, if you are not using testing).
– daroczig
Nov 23 '12 at 8:34
Yea...