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annotate m-toolbox/html_help/help/ug/plist_create_content.html @ 33:5e7477b94d94 database-connection-manager

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Add known repositories list to LTPDAPreferences
author Daniele Nicolodi <nicolodi@science.unitn.it>
date Mon, 05 Dec 2011 16:20:06 +0100
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1 <p>
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2 Parameters can be grouped together into parameter lists (<tt>plist</tt>).
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3 </p>
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4
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5 <ul>
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6 <li><a href="plist_create.html#direct">Creating parameter lists directly</a></li>
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7 <li><a href="plist_create.html#append">Appending parameters to a parameter list</a></li>
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8 <li><a href="plist_create.html#find">Finding parameters in a parameter list</a></li>
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9 <li><a href="plist_create.html#remove">Removing parameters from a parameter list</a></li>
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10 <li><a href="plist_create.html#set">Setting parameters in a parameter list</a></li>
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11 <li><a href="plist_create.html#combine">Combining multiple parameter lists</a></li>
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12 </ul>
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13
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14
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15 <!-- From parameters -->
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16 <hr>
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17 <h3><a name="params"></a>Creating parameter lists from parameters.</h3>
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18
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19
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20 <!-- Direct -->
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21 <hr>
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22 <h3><a name="direct"></a>Creating parameter lists directly.</h3>
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23 <p>
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24 You can also create parameter lists directly using the following constructor format:</p>
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25 <div class="fragment"><pre>
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26 pl = plist(<span class="string">'a'</span>, 1, <span class="string">'b'</span>, <span class="string">'hello'</span>)
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27 </pre></div>
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28 will result in the following output
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29 <div class="fragment"><pre>
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30 ----------- plist 01 -----------
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31 n params: 2
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32 ---- param 1 ----
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33 key: A
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34 val: 1
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35 -----------------
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36 ---- param 2 ----
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37 key: B
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38 val: 'hello'
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39 -----------------
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40 description:
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41 UUID: 9cc7d1f1-6ca3-477b-a6cc-2629d52579e6
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42 --------------------------------
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43 </pre></div>
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44
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45 <!-- Append -->
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46 <hr>
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47 <h3><a name="append"></a>Appending parameters to a parameter list.</h3>
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48 <p>
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49 Additional parameters can be appended to an existing parameter list using the <tt>append</tt>
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50 method:</p>
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51 <div class="fragment"><pre>
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52 pl = append(pl, <span class="string">'c'</span>, 3) <span class="comment">% append a third parameter</span>
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53 </pre></div>
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54 will result in the following output
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55 <div class="fragment"><pre>
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56 ----------- plist 01 -----------
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57 n params: 3
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58 ---- param 1 ----
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59 key: A
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60 val: 1
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61 -----------------
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62 ---- param 2 ----
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63 key: B
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64 val: 'hello'
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65 -----------------
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66 ---- param 3 ----
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67 key: C
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68 val: 3
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69 -----------------
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70 --------------------------------
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71 </pre></div>
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72
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73
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74 <!-- Access -->
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75 <hr>
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76 <h3><a name="find"></a>Finding parameters in a parameter list.</h3>
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77 <p>
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78 Accessing the contents of a <tt>plist</tt> can be achieved in two ways:
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79 </p>
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80 <div class="fragment"><pre>
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81 p1 = pl.params(1); <span class="comment">% get the first parameter</span>
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82 val = find(pl, <span class="string">'b'</span>); <span class="comment">% get the second parameter</span>
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83 </pre></div>
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84 <p>
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85 If the parameter name ('key') is known, then you can use the <tt>find</tt> method to
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86 directly retrieve the value of that parameter.
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87 </p>
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88
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89 <!-- Remove -->
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90 <hr>
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91 <h3><a name="remove"></a>Removing parameters from a parameter list.</h3>
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92 <p>
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93 You can also remove parameters from a parameter list:
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94 <div class="fragment"><pre>
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95 pl = remove(pl, 2) <span class="comment">% Remove the 2nd parameter in the list</span>
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96 pl = remove(pl, <span class="string">'a'</span>) <span class="comment">% Remove the parameter with the key 'a'</span>
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97 </pre></div>
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98 </p>
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99
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100 <!-- Set -->
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101 <hr>
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102 <h3><a name="set"></a>Setting parameters in a parameter list.</h3>
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103 <p>
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104 You can also set parameters contained in a parameter list:
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105 <div class="fragment"><pre>
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106 pl = plist(<span class="string">'a'</span>, 1, <span class="string">'b'</span>, <span class="string">'hello'</span>)
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107 pl = pset(pl, <span class="string">'a'</span>, 5, <span class="string">'b'</span>, <span class="string">'ola'</span>); <span class="comment">% Change the values of the parameter with the keys 'a' and 'b'</span>
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108 </pre></div>
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109 </p>
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110
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111
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112 <!-- Combine -->
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113 <hr>
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114 <h3><a name="combine"></a>Combining multiple parameter lists.</h3>
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115
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116 <p>
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117 Parameter lists can be combined:
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118 <div class="fragment"><pre>
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119 pl = combine(pl1, pl2)
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120 </pre></div>
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121 If <tt>pl1</tt> and <tt>pl2</tt> contain a parameter with the same key name, the output <tt>plist</tt> contains a parameter with that name but with the value from the first parameter list input.
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122 </p>
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123