random - prevent repetition of the numbers by not use of Collection Shuffle [Java] -

-

i used random function in code dont know how prevent repetition.also read questions subject dont want use "shuffle".

thanks , clues.

set doesn't allow duplicates

set set = new hashset();  while (set.size() < 20) {     set.add(r.nextint(100)); }

Comments

Post a Comment

Popular posts from this blog

asp.net mvc - Cannot display error message on Editor or EditorFor -

-
in mvc application, can display error messages inputs i.e. textboxfor , dropdownlist , etc. however, using same approach, cannot show validation error kendo().editor() or kendo().editorfor() . tried validationmessage beside validationmessagefor , not make sense. might problem be? view: <script type="text/javascript"> $(function () { //for using kendo validation: $("form").kendovalidator(); }); </script> //validation works textboxfor, dropdownlist, etc.: @html.labelfor(m => m.summary) @html.textboxfor(m => m.summary, new { maxlength = 50, @class = "k-textbox"}) @html.validationmessagefor(m => m.summary) //validation not work editor or editorfor: @html.labelfor(m => m.description, new { maxlength = 1000, @class = "editor-label" }) @(html.kendo().editor() //@(html.kendo().editorfor(m=>m.description) //also tried .name("description") .htmlattributes(new { @class...
Read more

python - No exponential form of the z-axis in matplotlib-3D-plots -

-
Image
i have similar problem described in how prevent numbers being changed exponential form in python matplotlib figure : i don't want (in special case) weird scientific formatting of axis. problem different have problem @ z -axis. 2-d plots can use ax.get_yaxis().get_major_formatter().set_useoffset(false) . , there no function ax.get_zaxis() what use format z -axis same way? edit: example: from mpl_toolkits.mplot3d import axes3d import numpy np import sys import matplotlib import matplotlib.pyplot pyplot def func(xi, ti): res = 10e3 + np.cos(ti) * np.sin(xi) return res if __name__ == '__main__': timespacing = 20 timestart = 0 timeend = 1 time = np.linspace(timestart, timeend, timespacing) widthspacing = 50 widthstart = 0 widthend = 3 width = np.linspace(widthstart, widthend, widthspacing) reslist = [] matplotlib.rcparams['legend.fontsize'] = 10 fig = pyplot.figure() ax = fig.gca(projection = '3d...
Read more

php - Using str_replace to translate a MySQL Table in html -

-
i have website contains pricelist of cs:go items. now, how did this: mysql db w/ prices --> select db x ( item name ) --> echo table ( works fine ) now want translation of item names. how planned it: mysql db --> $result= ( signature character ) --> $translate = str_replace (signature character $result) however, there's issue code or str_replace think. $translate returns $result no filtering. <?php require 'lang.php'; $servername = "localhost"; $username = ""; $dbname = ""; $password = ""; // create connection $conn = new mysqli($servername, $username, $password, $dbname); // check connection if ($conn->connect_error) { die("connection failed: " . $conn->connect_error); } // filter name $sql = "select name, price utf name 'k%'"; $result = $conn->query($sql); // translate $tr = str_replace('k','karambit','$result'); // ech...
Read more