qt gives me an error when I try to put a wildcard in my select query. I need to compare a variable with a query result but putting in wildcards doesnt seem to work.please help!
Text{
id: searchresults
text: ""
font.pixelSize: 45
color: "black"
opacity: 1
x: 10
function findHerb(value) {
var db = getDB();
db.transaction(
function(tx) {
var rec = tx.executeSql('SELECT name FROM Herbs WHERE name LIKE "?%"', [value]);
var r = "";
for(var i=0; i<rec.rows.length; i++) {
r+= rec.rows.item(i).name + "\n"
}
text = r;
}
)
}
}
This is kind of a hacky suggestion as it obviously doesn't address why your exact approach isn't working correctly. But my guess is that the % is somehow causing an issue when it expands the parameters into the statement.
Try something like this...
var likeVal = value + "%";
var rec = tx.executeSql('SELECT name FROM Herbs WHERE name LIKE "?"', [likeVal]);
Also, my other guess is that the args are parameterized for you with quotes already and you are making it double quote. Here is another possibility:
var rec = tx.executeSql('SELECT name FROM Herbs WHERE name LIKE ?%', [likeVal]);
Related
I have to write by.cssContainingText() in chrome console .This is regarding protractor.
Inside the implement of by.cssContainingText(cssSelector, searchText), it does two steps:
run querySelectorAll(cssSelector) to get a element list
iterate the element list to find which one's text match the searchText
Following is implement code of cssContainingText(), you also can find it at github
functions.findByCssContainingText = function(cssSelector, searchText, using) {
using = using || document;
if (searchText.indexOf('__REGEXP__') === 0) {
var match = searchText.split('__REGEXP__')[1].match(/\/(.*)\/(.*)?/);
searchText = new RegExp(match[1], match[2] || '');
}
var elements = using.querySelectorAll(cssSelector);
var matches = [];
for (var i = 0; i < elements.length; ++i) {
var element = elements[i];
var elementText = element.textContent || element.innerText || '';
var elementMatches = searchText instanceof RegExp ?
searchText.test(elementText) :
elementText.indexOf(searchText) > -1;
if (elementMatches) {
matches.push(element);
}
}
return matches;
};
It's more complex to write equivalent in browser's console, but you can do as following:
Open stackoverflow site: https://stackoverflow.com/
execute following example code in browser console
expand the return result in console
mouse over on each item of return result in console, then you can notice the mouse will over on the corresponding element on page as following screenshot
Example code:
Array.from(document.querySelectorAll('li > a')).filter((it)=>{return (it.textContent || it.innerText || '').contains('Users')})
Screenshot of example:
This isn't a good way to approach it lets see the syntax
<ul>
<li class="pet">Dog</li>
<li class="pet">Cat</li>
</ul>
// Returns the li for the dog, but not cat.
var dog = element(by.cssContainingText('.pet', 'Dog'));
inside the bracket the first argument is the .classname and the second argument is the actual text .Better write it in script and check it .it'll work
I want to ask why my Text Area produce the text 'undefined'
mdm.Database.MySQL.connect("localhost", "3306", true, "root", "adaptasi");
mdm.Database.MySQL.runQuery("SELECT morfo FROM materi");
TextIsi1.text = mdm.Database.MySQL.getData();
I use mdm for my flash (swf) project that connect with database.
Returns
An Array
Description
Returns the full query data to a 2 dimensional array. The first dimension contains the row number and the second dimension contains the field number.
Notes
A Query must first be executed with mdm.Database.MySQL.runQuery()
Example Code
//Prompts the data in Row 1, Field 4:
mdm.Database.MySQL.runQuery("SELECT * FROM mytable")
var dataSet:Array = mdm.Database.MySQL.getData();
mdm.Dialogs.prompt(dataSet[0][3])
//This example will display the entire contents of the specified table in a dialog prompt
var tableName:String = "myTable";
mdm.Database.MySQL.runQuery("SELECT * FROM "+tableName)
var dataSet:Array = mdm.Database.MySQL.getData();
var myText = ""
for (i=0; i<dataSet.length; i++) {
for (n=0; n<dataSet[0].length; n++) {
myText += "FIELD"+(n+1)+" = "+dataSet[i][n]+", ";
}
myText += "\n";
}
mdm.Dialogs.prompt(myText);
from documentation
your code should be something like:
TextIsi1.text = mdm.Database.MySQL.getData()[0][0];
I am trying to take a string which has shape option information and create the shape on my Google Map application.
The string is made by splitting an array that was built from a local text document.
The string appears as:
Circle{center: new google.maps.LatLng(38.041872419557094, -87.6046371459961),radius:5197.017394363823,fillColor: '#000000',strokeWeight: 1,strokeColor: '#000000',map:map};
The function I have to take such string and make the shape appears as:
function loadDrawings(evt)
{
var f = evt.target.files[0];
if (!f)
{
alert("Failed to load file");
}
else if (!f.type.match('text.*'))
{
alert(f.name + " is not a valid text file.");
}
else
{
var r = new FileReader();
r.onload = function (e)
{
var contents = e.target.result;
var drawings = [];
var drawing;
var drawingType;
var shape;
var shapeOptions;
drawings = contents.split(";");
for (i = 0; i < drawings.length - 1; i++) {
drawing = drawings[i].toString();
drawingType = drawing.substr(0, drawing.indexOf('{'));
if (drawingType == "Circle")
{
shapeOptions = drawing.substr(6); //UNIQUE TO CIRCLE
shape = new google.maps.Circle(shapeOptions);
shape.setMap(map);
}
};
}
r.readAsText(f);
}
}
My issue is shapeOptions as a string does not work in the above syntax for creating the Circle. However, if I take the contents of the string, which is:
{center: new google.maps.LatLng(38.041872419557094, -87.6046371459961),radius:5197.017394363823,fillColor: '#000000',strokeWeight: 1,strokeColor: '#000000',map:map}
And directly enter it, the shape appears.
Do I need a certain variable type for my shapeOptions for this to work? I know that the new google.maps. requires (), but I have had no luck creating a variable from my string. Am I missing something here?
Much appreciation for any help!
Your shapeOptions string is a JavaScript object literal, so you can eval() it to get the object:
shapeOptions = eval( '(' + drawing.substr(6) + ')' );
Since it has map:map in it, you don't need the subsequent setMap() call.
Also, you're missing a var for the i variable. I don't really recommend the coding style where all the var statements go at the top of a function. I find it error-prone; it's too easy to omit a var without noticing it. (I know some famous JavaScript experts insist that var at the top is the only way to do it, but they fail to see the tradeoffs involved.)
You don't need the .toString() on drawings[i]. It's already a string.
You have two different brace styles. Best to pick one and stick with it. For JavaScript, putting the { on a line by itself is not recommended, because this code will not do what you expect:
return // hoping to return an object literal - but it doesn't!
{
a: 'b',
c: 'd'
}
Whereas this code does work correctly:
return {
a: 'b',
c: 'd'
}
Since you are using FileReader, I think it's safe to assume you also have .forEach() available.
You can replace the code that uses .indexOf() and the hard coded length with a regular expression.
Putting all that together, you might end up with code like this:
var r = new FileReader();
r.onload = function( e ) {
e.target.result.split(";").forEach( function( drawing ) {
var match = drawing.match( /^(\w+)({.*})$/ );
if( ! match ) return; // unrecognized
var type = match[0], options = eval( match[1] );
switch( type ) {
case "Circle":
new google.maps.Circle( options );
break;
}
});
}
r.readAsText( f );
But you may be able to take it a step further. So far we're looking at a Circle (line breaks added for readability):
Circle{
center: new google.maps.LatLng(
38.041872419557094,
-87.6046371459961
),
radius:5197.017394363823,
fillColor: '#000000',
strokeWeight: 1,
strokeColor: '#000000',
map:map
}
With only a simple change, that could be executed as JavaScript directly. You just need the 'new google.maps.' at the beginning and () around the object literal:
new google.maps.Circle({
center: new google.maps.LatLng(
38.041872419557094,
-87.6046371459961
),
radius:5197.017394363823,
fillColor: '#000000',
strokeWeight: 1,
strokeColor: '#000000',
map:map
})
I assume you will have other drawing types as well? Will they all map directly to google.maps.* objects like Circle does? If so, you could simply do:
var r = new FileReader();
r.onload = function( e ) {
e.target.result.split(";").forEach( function( drawing ) {
eval( drawing.replace(
/^(\w+)({.*})$/,
'new google.maps.$1(\$2)'
) );
});
}
r.readAsText( f );
Hello everyone this is my little Frankenstein code, don't make fun of it, it works!
So you would pass in the table name and a data as an Associative array which are objects.
I'm pretty sure this is not good code as I was and still am learning ActionScript. So what can I change or how would you guys make it better?
public function save(table:String,data:Object):void
{
var conn:SQLConnection = new SQLConnection();
var folder:File = File.applicationStorageDirectory;
var dbFile:File = folder.resolvePath("task.db");
conn.open(dbFile);
var stat:SQLStatement=new SQLStatement();
stat.sqlConnection=conn;
//make fields and values
var fields:String="";
var values:String="";
for(var sRole:String in data)
{
fields=fields+sRole+",:";
stat.parameters[":"+sRole]=data[sRole];
}
//trim off white space
var s:String=new String(fields);
var cleanString:String=s.slice( 0, -2 );
//over here we add : infront of the values I forget why
var find:RegExp=/:/g;
var mymyField:String=new String(cleanString.replace(find,""));
cleanString=":"+cleanString;
var SQLFields:String=mymyField;
var SQLValues:String=cleanString;
stat.text="INSERT INTO "+table+" ("+SQLFields+")VALUES("+SQLValues+")";
stat.execute();
}
The part where you build your query is quite a horror, to be honest. Half the code removes junk you added just a few lines before. This makes it hard to read and understand. Which is a sign of poor code quality. The following is far shorter and simpler:
//make fields and values
var fields:Array = [];
for(var field:String in data) {
fields.push(field);
stat.parameters[":"+field]=data[fieldName];
}
var sqlFields:String = fields.join(",");
var sqlValues:String = ":"+fields.join(",:");
stat.text="INSERT INTO "+table+" ("+sqlFields+")VALUES("+sqlValues+")";
stat.execute();
Someone once told me that a stupid idea that works isn't stupid. As programmer's our first goal is (often) to solve business issues; and as long as our code does that then we are successful. You don't need to apologize for code that works.
In terms of what I would do to change your snippet; I might just encapsulate it a bit more. Can the folder, dbFile, and db file name (task.db) be added either as properties to your class or arguments to the method?
Can you separate out the creation of the SQL Statement from the connection handling from your data parsing?
Some remarks,
As said before you can factorise out all the db connection so you can reuse the function without rewriting it if you need to change the db name.
Don't use new String() you can avoid it
it's not usefull to clean white space between your field :a, :b is the same as :a,:b
Some convention don't begin your local var name with an uppercase, and it's not usefull to reassign them to another var
If i don't get wrong after your //make fields and values can be rewritten for example as :
//make fields and values
var fields:String = "";
var values:String = "";
var fieldSeparator:String = "";
for(var sRole:String in data)
{
fields += fieldSeparator + sRole;
var paramName:String = ":" + sRole;
values += fieldSeparator + paramName;
stat.parameters[paramName] = data[sRole];
fieldSeparator = ",";
}
stat.text = "INSERT INTO " + table +" (" + fields + ") VALUES (" + values + ")";
stat.execute();
I've got a JS array which is writing to a text file on the server using StreamWriter. This is the line that does it:
sw.WriteLine(Request.Form["seatsArray"]);
At the moment one line is being written out with the entire contents of the array on it. I want a new line to be written after every 5 commas. Example array:
BN,ST,A1,303,601,BN,ST,A2,303,621,BN,WC,A3,303,641,
Should output:
BN,ST,A1,303,601,
BN,ST,A2,303,621,
BN,WC,A3,303,641,
I know I could use a string replace but I only know how to make this output a new line after every comma, and not after a specified amount of commas.
How can I get this to happen?
Thanks!
Well, here's the simplest answer I can think of:
string[] bits = Request.Form["seatsArray"].Split(',');
for (int i = 0; i < bits.Length; i++)
{
sw.Write(bits[i]);
sw.Write(",");
if (i % 5 == 4)
{
sw.WriteLine();
}
}
It's not terribly elegant, but it'll get the job done, I believe.
You may want this afterwards to finish off the current line, if necessary:
if (bits[i].Length % 5 != 0)
{
sw.WriteLine();
}
I'm sure there are cleverer ways... but this is simple.
One question: are the values always three characters long? Because if so, you're basically just breaking the string up every 20 characters...
Something like:
var input = "BN,ST,A1,303,601,BN,ST,A2,303,621,BN,WC,A3,303,641,";
var splitted = input.Split(',');
var cols = 5;
var rows = splitted.Length / cols;
var arr = new string[rows, cols];
for (int row = 0; row < rows; row++)
for (int col = 0; col < cols; col++)
arr[row, col] = splitted[row * cols + col];
I will try find a more elegant solution. Properly with some functional-style over it.
Update: Just find out it is not actually what you needs. With this you get a 2D array with 3 rows and 5 columns.
This however will give you 3 lines. They do not have a ending ','. Do you want that? Do you always want to print it out? Or do you want to have access to the different lines?:
var splitted = input.Split(new [] { ','}, StringSplitOptions.RemoveEmptyEntries);
var lines = from item in splitted.Select((part, i) => new { part, i })
group item by item.i / 5 into g
select string.Join(",", g.Select(a => a.part));
Or by this rather large code. But I have often needed a "Chunk" method so it may be reusable. I do not know whether there is a build-in "Chunk" method - couldn't find it.
public static class LinqExtensions
{
public static IEnumerable<IList<T>> Chunks<T>(this IEnumerable<T> xs, int size)
{
int i = 0;
var curr = new List<T>();
foreach (var x in xs)
{
curr.Add(x);
if (++i % size == 0)
{
yield return curr;
curr = new List<T>();
}
}
}
}
Usage:
var lines = input.Split(',').Chunks(5).Select(list => string.Join(",", list));